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Ho-Hyun Son 39 Articles
Bonding of the silane containing multi-mode universal adhesive for lithium disilicate ceramics
Hyun-Young Lee, Geum-Jun Han, Juhea Chang, Ho-Hyun Son
Restor Dent Endod 2017;42(2):95-104.   Published online January 25, 2017
DOI: https://doi.org/10.5395/rde.2017.42.2.95
AbstractAbstract PDFPubReaderePub
Objectives

This study evaluated the influence of a multi-mode universal adhesive (MUA) containing silane (Single Bond Universal, 3M EPSE) on the bonding of resin cement to lithium disilicate.

Materials and Methods

Thirty IPS e.max CAD specimens (Ivoclar Vivadent) were fabricated. The surfaces were treated as follows: Group A, adhesive that did not contain silane (ANS, Porcelain Bonding Resin, Bisco); Group B, silane (S) and ANS; Group C, hydrofluoric acid (HF), S, and ANS; Group D, MUA; Group E, HF and MUA. Dual-cure resin cement (NX3, Kerr) was applied and composite resin cylinders of 0.8 mm in diameter were placed on it before light polymerization. Bonded specimens were stored in water for 24 hours or underwent a 10,000 thermocycling process prior to microshear bond strength testing. The data were analyzed using multivariate analysis of variance (p < 0.05).

Results

Bond strength varied significantly among the groups (p < 0.05), except for Groups A and D. Group C showed the highest initial bond strength (27.1 ± 6.9 MPa), followed by Group E, Group B, Group D, and Group A. Thermocycling significantly reduced bond strength in Groups B, C, and E (p < 0.05). Bond strength in Group C was the highest regardless of the storage conditions (p < 0.05).

Conclusions

Surface treatment of lithium disilicate using HF and silane increased the bond strength of resin cement. However, after thermocycling, the silane in MUA did not help achieve durable bond strength between lithium disilicate and resin cement, even when HF was applied.

Citations

Citations to this article as recorded by  
  • The influence of different factors on the bond strength of lithium disilicate-reinforced glass–ceramics to Resin: a machine learning analysis
    Jiawen Liu, Suqing Tu, Mingjuan Wang, Du Chen, Chen Chen, Haifeng Xie
    BMC Oral Health.2025;[Epub]     CrossRef
  • Effect of universal adhesives and self-etch ceramic primers on bond strength to glass-ceramics: A systematic review and meta-analysis of in vitro studies
    Renally Bezerra Wanderley Lima, Isis de Araújo Ferreira Muniz, Débora e Silva Campos, Fabián Murillo-Gómez, Ana Karina Maciel de Andrade, Rosângela Marques Duarte, Grace Mendonça de Souza
    The Journal of Prosthetic Dentistry.2024; 131(3): 392.     CrossRef
  • Effect of the difference water amounts and hydrolysis times of silane coupling agent on the shear bond strength between lithium disilicate glass ceramic and composite resin
    Pimchanok OSOTPRASIT, Sasipin LAUVAHUTANON, Yosnarong SIRIMETHAWONG, Patcharanun CHAIAMORNSUP, Pornpot JIANGKONGKHO
    Dental Materials Journal.2024; 43(3): 375.     CrossRef
  • Is additional silane application necessary for a new silane‐containing universal adhesive to bond to glass ceramics?
    Priscila Luciane da Silva, Hélio Radke Bittencourt, Luiz Henrique Burnett, Ana Maria Spohr
    Journal of Esthetic and Restorative Dentistry.2024; 36(10): 1452.     CrossRef
  • The Effect of Various Lasers on the Bond Strength Between Orthodontic Brackets and Dental Ceramics: A Systematic Review and Meta-Analysis
    Seyed Ali Mosaddad, Jaafar Abduo, Mehrnaz Zakizade, Hamid Tebyaniyan, Ahmed Hussain
    Photobiomodulation, Photomedicine, and Laser Surgery.2024; 42(1): 20.     CrossRef
  • Long-Term Bonding Performance of One-Bottle vs. Two-Bottle Bonding Agents to Lithium Disilicate Ceramics
    Masao Irie, Masahiro Okada, Yukinori Maruo, Goro Nishigawa, Takuya Matsumoto
    Polymers.2024; 16(16): 2266.     CrossRef
  • Bond strength to different CAD/CAM lithium disilicate reinforced ceramics
    Mona Alhomuod, Jin‐Ho Phark, Sillas Duarte
    Journal of Esthetic and Restorative Dentistry.2023; 35(1): 129.     CrossRef
  • Surface Treatment Effect on Shear Bond Strength between Lithium Disilicate Glass-Ceramic and Resin Cement
    Siripan Simasetha, Awiruth Klaisiri, Tool Sriamporn, Kraisorn Sappayatosok, Niyom Thamrongananskul
    European Journal of Dentistry.2022; 16(02): 373.     CrossRef
  • Bonding of Clear Aligner Composite Attachments to Ceramic Materials: An In Vitro Study
    Bashair A. Alsaud, Maher S. Hajjaj, Ahmad I. Masoud, Ensanya A. Abou Neel, Dalia A. Abuelenain, Amal I. Linjawi
    Materials.2022; 15(12): 4145.     CrossRef
  • Bonding of different resin luting materials to composite, polymer-infiltrated and feldspathic ceramic CAD/CAM blocks
    Burcu Dikici, Esra Can Say
    Journal of Adhesion Science and Technology.2022; 36(14): 1572.     CrossRef
  • Influence of mechanical and chemical pre-treatments on the repair of a hybrid ceramic
    Sascha Niklas Jung, Stefan Rüttermann
    Dental Materials.2022; 38(7): 1140.     CrossRef
  • Effect of Silane-Containing Universal Adhesives on the Bonding Strength of Lithium Disilicate
    Yu-Ri Kim, Jae-Hoon Kim, Sung-Ae Son, Jeong-Kil Park
    Materials.2021; 14(14): 3976.     CrossRef
  • Ceramics in dentistry: which material is appropriate for the anterior or posterior Dentition? Part 1: materials science
    Loo Chien Win, Peter Sands, Stephen J Bonsor, FJ Trevor Burke
    Dental Update.2021; 48(8): 680.     CrossRef
  • The effect of different ceramic surface treatments on the repair bond strength of resin composite to lithium disilicate ceramic
    Nanako UEDA, Tomohiro TAKAGAKI, Toru NIKAIDO, Rena TAKAHASHI, Masaomi IKEDA, Junji TAGAMI
    Dental Materials Journal.2021; 40(5): 1073.     CrossRef
  • Bonding Strength of Universal Adhesives to Indirect Substrates: A Meta‐Analysis of in Vitro Studies
    Carlos Enrique Cuevas‐Suárez, Wellington Luiz de Oliveira da Rosa, Rafael Pino Vitti, Adriana Fernandes da Silva, Evandro Piva
    Journal of Prosthodontics.2020; 29(4): 298.     CrossRef
  • Effect of different surface treatments and multimode adhesive application on the Weibull characteristics, wettability, surface topography and adhesion to CAD/CAM lithium disilicate ceramic
    Karina Barbosa Souza, Dayanne Monielle Duarte Moura, Sarah Emille Gomes da Silva, Gabriela Monteiro de Araújo, Rafael de Almeida Spinelli Pinto, Fabíola Pessôa Pereira Leite, Mutlu Özcan, Rodrigo Othávio de Assunção e Souza
    Journal of Applied Oral Science.2020;[Epub]     CrossRef
  • Effects of the ratio of silane to 10-methacryloyloxydecyl dihydrogenphosphate (MDP) in primer on bonding performance of silica-based and zirconia ceramics
    Minkhant Koko, Tomohiro Takagaki, Ahmed Abdou, Masanao Inokoshi, Masaomi Ikeda, Takahiro Wada, Motohiro Uo, Toru Nikaido, Junji Tagami
    Journal of the Mechanical Behavior of Biomedical Materials.2020; 112: 104026.     CrossRef
  • Influence of surface treatments and repair materials on the shear bond strength of CAD/CAM provisional restorations
    Ki-Won Jeong, Sung-Hun Kim
    The Journal of Advanced Prosthodontics.2019; 11(2): 95.     CrossRef
  • Microtensile bond strengths of adhesively bonded polymer-based CAD/CAM materials to dentin
    Nuray CAPA, Esra CAN SAY, Cansin CELEBI, Ayca CASUR
    Dental Materials Journal.2019; 38(1): 75.     CrossRef
  • Simplified Surface Treatments for Ceramic Cementation: Use of Universal Adhesive and Self-Etching Ceramic Primer
    Heloísa A. B. Guimarães, Paula C. Cardoso, Rafael A. Decurcio, Lúcio J. E. Monteiro, Letícia N. de Almeida, Wellington F. Martins, Ana Paula R. Magalhães
    International Journal of Biomaterials.2018; 2018: 1.     CrossRef
  • Effects of surface treatments on repair bond strength of a new CAD/CAM ZLS glass ceramic and two different types of CAD/CAM ceramics
    Ayse Seda Ataol, Gulfem Ergun
    Journal of Oral Science.2018; 60(2): 201.     CrossRef
  • An in vitro evaluation of fracture load of implant‐supported zirconia‐based prostheses fabricated with different veneer materials
    Hiroki Takata, Futoshi Komine, Junichi Honda, Markus B. Blatz, Hideo Matsumura
    Clinical Oral Implants Research.2018; 29(4): 396.     CrossRef
  • Effects of multiple firings on mechanical properties and resin bonding of lithium disilicate glass-ceramic
    Hongliang Meng, Haifeng Xie, Lu Yang, Bingzhuo Chen, Ying Chen, Huaiqin Zhang, Chen Chen
    Journal of the Mechanical Behavior of Biomedical Materials.2018; 88: 362.     CrossRef
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Elemental analysis of caries-affected root dentin and artificially demineralized dentin
Young-Hye Sung, Ho-Hyun Son, Keewook Yi, Juhea Chang
Restor Dent Endod 2016;41(4):255-261.   Published online August 19, 2016
DOI: https://doi.org/10.5395/rde.2016.41.4.255
AbstractAbstract PDFPubReaderePub
Objectives

This study aimed to analyze the mineral composition of naturally- and artificially-produced caries-affected root dentin and to determine the elemental incorporation of resin-modified glass ionomer (RMGI) into the demineralized dentin.

Materials and Methods

Box-formed cavities were prepared on buccal and lingual root surfaces of sound human premolars (n = 15). One cavity was exposed to a microbial caries model using a strain of Streptococcus mutans. The other cavity was subjected to a chemical model under pH cycling. Premolars and molars with root surface caries were used as a natural caries model (n = 15). Outer caries lesion was removed using a carbide bur and a hand excavator under a dyeing technique and restored with RMGI (FujiII LC, GC Corp.). The weight percentages of calcium (Ca), phosphate (P), and strontium (Sr) and the widths of demineralized dentin were determined by electron probe microanalysis and compared among the groups using ANOVA and Tukey test (p < 0.05).

Results

There was a pattern of demineralization in all models, as visualized with scanning electron microscopy. Artificial models induced greater losses of Ca and P and larger widths of demineralized dentin than did a natural caries model (p < 0.05). Sr was diffused into the demineralized dentin layer from RMGI.

Conclusions

Both microbial and chemical caries models produced similar patterns of mineral composition on the caries-affected dentin. However, the artificial lesions had a relatively larger extent of demineralization than did the natural lesions. RMGI was incorporated into the superficial layer of the caries-affected dentin.

Citations

Citations to this article as recorded by  
  • Frontiers of Global Research Trend on Root Caries: A Bibliometric Analysis
    Grace Yuchan Xu, Irene Shuping Zhao, Christie Ying Kei Lung, Iris Xiaoxue Yin, Edward Chin Man Lo, Chun Hung Chu
    International Dental Journal.2024; 74(6): 1197.     CrossRef
  • Effects of NaF versus SDF treatment on microhardness of artificial radiation caries at cervical and root areas
    Pipop SAIKAEW, Karis KATEKOVIT, Anocha BURANARACHADA, Nattapat SAIMALA, Anussara PRAYONGRAT, Pornpoj FUANGTHARNTHIP
    Dental Materials Journal.2024; 43(4): 591.     CrossRef
  • Degradable polycaprolactone/buffer composites as pH regulating carrier materials for drug delivery and 3D printed biomaterials
    Therese Schüler, Celine Guder, Franziska Alt, Katrin Lorenz, Torsten Sterzenbach, Christian Hannig, Hans-Peter Wiesmann, Benjamin Kruppke
    Materialia.2024; 34: 102087.     CrossRef
  • The Effect of Oral Care Foams and a Spray on Salivary pH Changes after Exposure to Acidic Beverages in Young Adults
    Maria Polyakova, Anna Egiazaryan, Vladlena Doroshina, Alexandr Zaytsev, Alexey Malashin, Ksenia Babina, Nina Novozhilova
    Dentistry Journal.2024; 12(4): 93.     CrossRef
  • In Vitro Models Used in the Formation of Root Caries Lesions—A Review of the Literature
    Zaid Dohan, Lara T. Friedlander, Paul R. Cooper, Kai-Chun Li, Jithendra T. Ratnayake, May L. Mei
    Dentistry Journal.2023; 11(12): 269.     CrossRef
  • Yttrium Trifluoride as a Marker of Infiltration Rate of Decalcified Root Cementum: An In Vitro Study
    Anna Nowak-Wachol, Anna Korytkowska-Wałach, Bartosz Chmiela, Kacper Wachol, Maciej Łopaciński, Magdalena Wyszyńska, Yousuf Al-Dulaimi, Małgorzata Skucha-Nowak
    Polymers.2022; 14(4): 780.     CrossRef
  • Effect of fluoride, chlorhexidine or Nd:YAG on the progression of root dentin demineralization after removal of the demineralized organic matrix
    Andrea Maselli, Tânia Mara da Silva, Lucélia Lemes Gonçalves, Aline Silva Braga, Eduardo Bresciani, Ana Carolina Magalhães, Sérgio Eduardo de Paiva Gonçalves
    Journal of Applied Oral Science.2022;[Epub]     CrossRef
  • Effect of ionizing radiation and cariogenic biofilm challenge on root-dentin caries
    Camila de Carvalho Almança Lopes, Renata Borges Rodrigues, Maximiliano Sérgio Cenci, Juliana Lays Stolfo Uehara, Tamires Timm Maske, Pedro Henrique Justino Oliveira Limirio, Priscilla Barbosa Ferreira Soares, Veridiana Resende Novais
    Clinical Oral Investigations.2021; 25(6): 4059.     CrossRef
  • Silver diamine fluoride treatment of active root caries lesions in older adults: A case series
    Chelsea Mitchell, Andrew J Gross, Peter Milgrom, Lloyd Mancl, David B Prince
    Journal of Dentistry.2021; 105: 103561.     CrossRef
  • A Hydrogel Drink With High Fructose Content Generates Higher Exogenous Carbohydrate Oxidation and a Reduced Drop in Dental Biofilm pH Compared to Two Other, Commercially Available, Carbohydrate Sports Drinks
    Stefan Pettersson, Martin Ahnoff, Fredrik Edin, Peter Lingström, Charlotte Simark Mattsson, Ulrika Andersson-Hall
    Frontiers in Nutrition.2020;[Epub]     CrossRef
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Epigenetics: general characteristics and implications for oral health
Ji-Yun Seo, Yoon-Jung Park, Young-Ah Yi, Ji-Yun Hwang, In-Bog Lee, Byeong-Hoon Cho, Ho-Hyun Son, Deog-Gyu Seo
Restor Dent Endod 2015;40(1):14-22.   Published online November 13, 2014
DOI: https://doi.org/10.5395/rde.2015.40.1.14
AbstractAbstract PDFPubReaderePub

Genetic information such as DNA sequences has been limited to fully explain mechanisms of gene regulation and disease process. Epigenetic mechanisms, which include DNA methylation, histone modification and non-coding RNAs, can regulate gene expression and affect progression of disease. Although studies focused on epigenetics are being actively investigated in the field of medicine and biology, epigenetics in dental research is at the early stages. However, studies on epigenetics in dentistry deserve attention because epigenetic mechanisms play important roles in gene expression during tooth development and may affect oral diseases. In addition, understanding of epigenetic alteration is important for developing new therapeutic methods. This review article aims to outline the general features of epigenetic mechanisms and describe its future implications in the field of dentistry.

Citations

Citations to this article as recorded by  
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    Xiaoyan Hu, Huiru Li, Minzhi Yang, Yujiong Chen, Ailin Zeng, Jiayuan Wu, Jian Zhang, Yuan Tian, Jing Tang, Shengyan Qian, Mingsong Wu
    Biological Trace Element Research.2024; 202(1): 221.     CrossRef
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    Journal of Interdisciplinary Dentistry.2024; 14(3): 145.     CrossRef
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    Medical Oncology.2023;[Epub]     CrossRef
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    Juhi R. Uttamani, Afsar R. Naqvi, Araceli Maria Valverde Estepa, Varun Kulkarni, Maria F. Brambila, Gloria Martínez, Gabriela Chapa, Christine D. Wu, Wei Li, Sona Rivas‐Tumanyan, Salvador Nares
    Journal of Clinical Periodontology.2023; 50(1): 102.     CrossRef
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    Genes.2023; 14(6): 1202.     CrossRef
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    Haoling Chen, Zijing Huang, Chuxiao Chen
    Cellular Reprogramming.2023; 25(1): 11.     CrossRef
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    Cytology and Genetics.2022; 56(5): 475.     CrossRef
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    Oral Diseases.2022; 28(2): 249.     CrossRef
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    Işıl Nihan Korkmaz, Hasan Özdemir
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    Journal of Biotechnology and Strategic Health Research.2021; 5(1): 1.     CrossRef
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    Ivana M. Zaccara, Letícia B. Mestieri, Emily F. S. Pilar, Maria S. Moreira, Fabiana S. Grecca, Manoela D. Martins, Patrícia Maria Poli Kopper
    Lasers in Medical Science.2020; 35(3): 741.     CrossRef
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    N. Gomaa, H. Tenenbaum, M. Glogauer, C. Quiñonez
    Journal of Dental Research.2019; 98(13): 1442.     CrossRef
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    Zehuan Mo, Qimeng Li, Luhui Cai, Minkang Zhan, Qiong Xu
    Molecular Immunology.2019; 111: 11.     CrossRef
  • One-Carbon Metabolism Links Nutrition Intake to Embryonic Development via Epigenetic Mechanisms
    Si Wu, Jun Zhang, Feifei Li, Wei Du, Xin Zhou, Mian Wan, Yi Fan, Xin Xu, Xuedong Zhou, Liwei Zheng, Yachuan Zhou
    Stem Cells International.2019; 2019: 1.     CrossRef
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    T Hui, C Wang, D Chen, L Zheng, D Huang, L Ye
    Oral Diseases.2017; 23(1): 22.     CrossRef
  • Current Concepts of Epigenetics and Its Role in Periodontitis
    Lena Larsson
    Current Oral Health Reports.2017; 4(4): 286.     CrossRef
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    BMC Oral Health.2015;[Epub]     CrossRef
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How to design in situ studies: an evaluation of experimental protocols
Young-Hye Sung, Hae-Young Kim, Ho-Hyun Son, Juhea Chang
Restor Dent Endod 2014;39(3):164-171.   Published online May 13, 2014
DOI: https://doi.org/10.5395/rde.2014.39.3.164
AbstractAbstract PDFPubReaderePub
Objectives

Designing in situ models for caries research is a demanding procedure, as both clinical and laboratory parameters need to be incorporated in a single study. This study aimed to construct an informative guideline for planning in situ models relevant to preexisting caries studies.

Materials and Methods

An electronic literature search of the PubMed database was performed. A total 191 of full articles written in English were included and data were extracted from materials and methods. Multiple variables were analyzed in relation to the publication types, participant characteristics, specimen and appliance factors, and other conditions. Frequencies and percentages were displayed to summarize the data and the Pearson's chi-square test was used to assess a statistical significance (p < 0.05).

Results

There were many parameters commonly included in the majority of in situ models such as inclusion criteria, sample sizes, sample allocation methods, tooth types, intraoral appliance types, sterilization methods, study periods, outcome measures, experimental interventions, etc. Interrelationships existed between the main research topics and some parameters (outcome measures and sample allocation methods) among the evaluated articles.

Conclusions

It will be possible to establish standardized in situ protocols according to the research topics. Furthermore, data collaboration from comparable studies would be enhanced by homogeneous study designs.

Citations

Citations to this article as recorded by  
  • What is the effectiveness of titanium tetrafluoride to prevent or treat dental caries and tooth erosion? A systematic review
    Ana Beatriz Chevitarese, Karla Lorene de França Leite, Guido A. Marañón-Vásquez, Danielle Masterson, Matheus Pithon, Lucianne Cople Maia
    Acta Odontologica Scandinavica.2022; 80(6): 441.     CrossRef
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    Bruna Machado da Silva, Daniela Rios, Gerson Aparecido Foratori-Junior, Ana Carolina Magalhães, Marília Afonso Rabelo Buzalaf, Silvia De Carvalho Sales Peres, Heitor Marques Honório
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    Brandon M Booth, Karel Mundnich, Tiantian Feng, Amrutha Nadarajan, Tiago H Falk, Jennifer L Villatte, Emilio Ferrara, Shrikanth Narayanan
    Journal of Medical Internet Research.2019; 21(8): e12832.     CrossRef
  • Evaluation of an antibacterial orthodontic adhesive incorporated with niobium-based bioglass: an in situ study
    Felipe Weidenbach DEGRAZIA, Aline Segatto Pires ALTMANN, Carolina Jung FERREIRA, Rodrigo Alex ARTHUR, Vicente Castelo Branco LEITUNE, Susana Maria Werner SAMUEL, Fabrício Mezzomo COLLARES
    Brazilian Oral Research.2019;[Epub]     CrossRef
  • A Review of the Common Models Used in Mechanistic Studies on Demineralization-Remineralization for Cariology Research
    Ollie Yiru Yu, Irene Shuping Zhao, May Lei Mei, Edward Chin-Man Lo, Chun-Hung Chu
    Dentistry Journal.2017; 5(2): 20.     CrossRef
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    Y Yu, X Wang, C Ge, B Wang, C Cheng, Y‐H Gan
    Oral Diseases.2017; 23(3): 353.     CrossRef
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    S. F. Tan, H. J. Tong, X. Y. Lin, B. Mok, C. H. Hong
    European Archives of Paediatric Dentistry.2016; 17(3): 145.     CrossRef
  • In situ antibiofilm effect of glass-ionomer cement containing dimethylaminododecyl methacrylate
    Jin Feng, Lei Cheng, Xuedong Zhou, Hockin H.K. Xu, Michael D. Weir, Markus Meyer, Hans Maurer, Qian Li, Matthias Hannig, Stefan Rupf
    Dental Materials.2015; 31(8): 992.     CrossRef
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Thermal irritation of teeth during dental treatment procedures
Su-Jung Kwon, Yoon-Jung Park, Sang-Ho Jun, Jin-Soo Ahn, In-Bog Lee, Byeong-Hoon Cho, Ho-Hyun Son, Deog-Gyu Seo
Restor Dent Endod 2013;38(3):105-112.   Published online August 23, 2013
DOI: https://doi.org/10.5395/rde.2013.38.3.105
AbstractAbstract PDFPubReaderePub

While it is reasonably well known that certain dental procedures increase the temperature of the tooth's surface, of greater interest is their potential damaging effect on the pulp and tooth-supporting tissues. Previous studies have investigated the responses of the pulp, periodontal ligament, and alveolar bone to thermal irritation and the temperature at which thermal damage is initiated. There are also many in vitro studies that have measured the temperature increase of the pulp and tooth-supporting tissues during restorative and endodontic procedures. This review article provides an overview of studies measuring temperature increases in tooth structures during several restorative and endodontic procedures, and proposes clinical guidelines for reducing potential thermal hazards to the pulp and supporting tissues.

Citations

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  • External Root Temperature and Its Relationship With Dentin Thickness During Gutta-Percha Removal Procedures With Ultrasound. An Ex Vivo Study
    Juan Ramon Salazar-Silva, Carlos Emilio Paschoal, Daniela de Fatima Teixeira da Silva, Denise Maria Zezell, Fábio Luiz Cunha D'Assuncao, Celso Luiz Caldeira
    Journal of Endodontics.2025; 51(3): 340.     CrossRef
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    Geraldo Edson Freitas Athayde de Moraes, Daniel Guimarães Pedro Rocha, Carlos Eduardo Fontana, Rina Andréa Pelegrine, Alexandre Sigrist de Martin, Índia Olinta De Azevedo Queiroz, Carlos Eduardo da Silveira Bueno
    European Journal of Dentistry.2025;[Epub]     CrossRef
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Flexural strength and microstructure of two lithium disilicate glass ceramics for CAD/CAM restoration in the dental clinic
Suk-Ho Kang, Juhea Chang, Ho-Hyun Son
Restor Dent Endod 2013;38(3):134-140.   Published online August 23, 2013
DOI: https://doi.org/10.5395/rde.2013.38.3.134
AbstractAbstract PDFPubReaderePub
Objectives

There has been a growing interest in glass ceramic systems with good esthetics, high fracture resistance and bonding durability, and simplified fabrication techniques using CAD/CAM. The aim of this study is to compare flexural strength before and after heat treatment of two lithium disilicate CAD/CAM blocks, IPS e.max CAD (Ivoclar Vivadent) and Rosetta SM (Hass), and to observe their crystalline structures.

Materials and Methods

Biaxial flexural strength was tested according to ISO 6872 with 20 disc form specimens sliced from each block before and after heat treatment. Also, the crystalline structures were observed using field-emission scanning microscopy (FE-SEM, Hitachi) and x-ray diffraction (XRD, Rigaku) analysis. The mean values of the biaxial flexural strength were analyzed by the Mann-Whitney U test at a significance level of p = 0.05.

Results

There were no statistically significant differences in flexural strength between IPS e.max CAD and Rosetta SM either before heat treatment or after heat treatment. For both ceramics, the initial flexural strength greatly increased after heat treatment, with significant differences (p < 0.05). The FE-SEM images presented similar patterns of crystalline structure in the two ceramics. In the XRD analysis, they also had similar patterns, presenting high peak positions corresponding to the standard lithium metasilicate and lithium disilicate at each stage of heat treatment.

Conclusions

IPS e.max CAD and Rosetta SM showed no significant differences in flexural strength. They had a similar crystalline pattern and molecular composition.

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    Fu Wang, Tao Yu, Jihua Chen
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    Peixin Hu, Lu Yao, Mingji Zhang, Zilin Nie, Encai Ji, QiTao Lue, Zhengdi He
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    Le Fu, Håkan Engqvist, Wei Xia
    Materials.2020; 13(5): 1049.     CrossRef
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    Jean S. Miranda, Aline S. P. Barcellos, Carolina M. MartinelliLobo, Taciana M. F. Caneppele, Marina Amaral, Estevão T. Kimpara
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    Meral Kurt, Merve Bankoğlu Güngör, Seçil Karakoca Nemli, Bilge Turhan Bal
    Journal of Prosthodontic Research.2020; 64(2): 202.     CrossRef
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    Lucas do Nascimento TAVARES, Karla ZANCOPÉ, Anielle Christine Almeida SILVA, Luís Henrique Araújo RAPOSO, Carlos José SOARES, Flávio Domingues das NEVES
    Brazilian Oral Research.2020;[Epub]     CrossRef
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    Georgina García-Engra, Lucia Fernandez-Estevan, Javier Casas-Terrón, Antonio Fons-Font, Pablo Castelo-Baz, Rubén Agustín-Panadero, Juan Luis Román-Rodriguez
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    Liliana Porojan, Roxana-Diana Vasiliu, Mihaela-Ionela Bîrdeanu, Sorin-Daniel Porojan
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    Satheesh B. Haralur, Alaa Ali Alamri, Shatha Abdulrahman Alshehri, Danyah Saeed Alzahrani, Mohammed Alfarsi
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    Karina Barbosa Souza, Dayanne Monielle Duarte Moura, Sarah Emille Gomes da Silva, Gabriela Monteiro de Araújo, Rafael de Almeida Spinelli Pinto, Fabíola Pessôa Pereira Leite, Mutlu Özcan, Rodrigo Othávio de Assunção e Souza
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    Vasilliki Roussou, Aspasia Pachiou, Stefanos Kourtis
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    LH Raposo, PS Borella, DC Ferraz, LM Pereira, MS Prudente, PC Santos-Filho
    Operative Dentistry.2020; 45(4): 416.     CrossRef
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    Tahereh Ghaffari, Elnaz Moslehifard, Mehrnaz Motiei
    Journal of Dental Research, Dental Clinics, Dental Prospects.2019; 13(3): 227.     CrossRef
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    Lubica Hallmann, Peter Ulmer, Mark-Daniel Gerngross, Justin Jetter, Michaël Mintrone, Frank Lehmann, Matthias Kern
    Dental Materials.2019; 35(5): 713.     CrossRef
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    Rui Li, Shi Qing Ma, Cheng Cheng Zang, Wen Yi Zhang, Zi Hao Liu, Ying Chun Sun, Yi Yu Feng, Rafael Sarkis-Onofre
    PLOS ONE.2019; 14(7): e0220466.     CrossRef
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    Mahshid Mohammadibassir, Mohammad Bagher Rezvani, Hossein Golzari, Elham Moravej Salehi, Mohammad Amin Fahimi, Mohammad Javad Kharazi Fard
    Journal of Prosthodontics.2019;[Epub]     CrossRef
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    Shruti Vidhawan Agarwalla, Ritika Malhotra, Vinicius Rosa
    Journal of the Mechanical Behavior of Biomedical Materials.2019; 100: 103388.     CrossRef
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    Tamer A. Hamza, Rana M. Sherif
    Journal of Prosthodontics.2019;[Epub]     CrossRef
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    Yagmur Ozer Caprak, Pinar Turkoglu, Gokhan Akgungor
    Journal of Prosthodontics.2019;[Epub]     CrossRef
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    Sung-Hoon Kim, Chan-Jin Park, Lee-Ra Cho, Yoon-Hyuk Huh
    The Journal of Prosthetic Dentistry.2018; 120(2): 282.     CrossRef
  • The effect of adhesive failure and defects on the stress distribution in all-ceramic crowns
    Yonggang Liu, Yuanzhi Xu, Bo Su, Dwayne Arola, Dongsheng Zhang
    Journal of Dentistry.2018; 75: 74.     CrossRef
  • Mechanical and optical properties of monolithic CAD-CAM restorative materials
    Nazmiye Sen, Yesim Olcer Us
    The Journal of Prosthetic Dentistry.2018; 119(4): 593.     CrossRef
  • Effects of surface treatments on repair bond strength of a new CAD/CAM ZLS glass ceramic and two different types of CAD/CAM ceramics
    Ayse Seda Ataol, Gulfem Ergun
    Journal of Oral Science.2018; 60(2): 201.     CrossRef
  • Evaluation of the marginal and internal gaps of three different dental prostheses: comparison of the silicone replica technique and three-dimensional superimposition analysis
    Jin-Young Park, So-Yeon Bae, Jae-Jun Lee, Ji-Hwan Kim, Hae-Young Kim, Woong-Chul Kim
    The Journal of Advanced Prosthodontics.2017; 9(3): 159.     CrossRef
  • Dental ceramics: a review of new materials and processing methods
    Lucas Hian da SILVA, Erick de LIMA, Ranulfo Benedito de Paula MIRANDA, Stéphanie Soares FAVERO, Ulrich LOHBAUER, Paulo Francisco CESAR
    Brazilian Oral Research.2017;[Epub]     CrossRef
  • Bonding of the silane containing multi-mode universal adhesive for lithium disilicate ceramics
    Hyun-Young Lee, Geum-Jun Han, Juhea Chang, Ho-Hyun Son
    Restorative Dentistry & Endodontics.2017; 42(2): 95.     CrossRef
  • Tribological behaviour of unveneered and veneered lithium disilicate dental material
    C.G. Figueiredo-Pina, N. Patas, J. Canhoto, R. Cláudio, S.M. Olhero, A.P. Serro, A.C. Ferro, M. Guedes
    Journal of the Mechanical Behavior of Biomedical Materials.2016; 53: 226.     CrossRef
  • Survival of resin infiltrated ceramics under influence of fatigue
    Moustafa N. Aboushelib, Mohamed H. Elsafi
    Dental Materials.2016; 32(4): 529.     CrossRef
  • Reliability Analysis of Lithium Disilicate Crowns: Effectof Veneering and Milling Production Workflow
    Paolo Cardelli, Nicola Serafini, Bruna Sinjari, Giovanna Murmura, Mutlu Özcan
    Journal of Prosthodontics.2016; 25(8): 623.     CrossRef
  • Effects of pretreatments and hydrothermal aging on biaxial flexural strength of lithium di-silicate and Mg-PSZ ceramics
    Maria André, Wen Kou, Göran Sjögren, Anders Sundh
    Journal of Dentistry.2016; 55: 25.     CrossRef
  • EFFECT OF PRE-CRYSTALLIZATION ON LITHIUM DISILICATE GLASS-CERAMICS FABRICATED BY DIFFERENT PROCESSES
    Naruporn Monmaturapoj, Autcharaporn Sri-On, Thossapol Chunkiri
    Phosphorus Research Bulletin.2016; 31: 24.     CrossRef
  • Measurement of J-integral in CAD/CAM dental ceramics and composite resin by digital image correlation
    Yanxia Jiang, Anna Akkus, Renato Roperto, Ozan Akkus, Bo Li, Lisa Lang, Sorin Teich
    Journal of the Mechanical Behavior of Biomedical Materials.2016; 62: 240.     CrossRef
  • The Effect of Hydrofluoric Acid Etching Duration on the Surface Micromorphology, Roughness, and Wettability of Dental Ceramics
    Ravikumar Ramakrishnaiah, Abdulaziz Alkheraif, Darshan Divakar, Jukka Matinlinna, Pekka Vallittu
    International Journal of Molecular Sciences.2016; 17(6): 822.     CrossRef
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    Keisuke Nakamura, Akio Harada, Ryoichi Inagaki, Taro Kanno, Yoshimi Niwano, Percy Milleding, Ulf Örtengren
    Acta Odontologica Scandinavica.2015; 73(8): 602.     CrossRef
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    Deborah Stona, Luiz Henrique Burnett, Eduardo Gonçalves Mota, Ana Maria Spohr
    The Journal of the American Dental Association.2015; 146(7): 501.     CrossRef
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    Paul de Kok, Cornelis J. Kleverlaan, Niek de Jager, Ruud Kuijs, Albert J. Feilzer
    The Journal of Prosthetic Dentistry.2015; 114(1): 59.     CrossRef
  • Effect of Thermocycling on Flexural Strength and Weibull Statistics of Machinable Glass–Ceramic and Composite Resin
    Chaimongkon Peampring, Sasiwimol Sanohkan
    The Journal of Indian Prosthodontic Society.2014; 14(4): 376.     CrossRef
  • The effects of repeated heat-pressing on the mechanical properties and microstructure of IPS e.max Press
    Xuehua Tang, Chengzhong Tang, Han Su, Huinan Luo, Takashi Nakamura, Hirofumi Yatani
    Journal of the Mechanical Behavior of Biomedical Materials.2014; 40: 390.     CrossRef
  • Flexural strength of a pressable lithium disilicate ceramic: influence of surface treatments
    Tabata do Prado Sato, Caroline Cotes, Lígia Tiaki Yamamoto, Natalia Rivoli Rossi, Vanessa da Cruz Macedo, Estevão Tomomitsu Kimpara
    Applied Adhesion Science.2013;[Epub]     CrossRef
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Color and hardness changes in artificial white spot lesions after resin infiltration
Ji-Hoon Kim, Ho-Hyun Son, Juhea Chang
Restor Dent Endod 2012;37(2):90-95.   Published online May 18, 2012
DOI: https://doi.org/10.5395/rde.2012.37.2.90
AbstractAbstract PDFPubReaderePub
Objectives

The purpose of this study was to determine the effect of resin infiltration technique on color and surface hardness of white spot lesion (WSL) with various degrees of demineralization.

Materials and Methods

Ten human upper premolars were cut and divided into quarters with a 3 × 4 mm window on the enamel surface. Each specimens were separated into four groups (n = 10) and immersed in demineralization solution to create WSL: control, no treatment (baseline); 12 h, 12 hr demineralization; 24 h, 24 hr demineralization; 48 h, 48 hr demineralization. Resin infiltration was performed to the specimens using Icon (DMG). CIEL*a*b* color parameters of the enamel-dentin complex were determined using a spectroradiometer at baseline, after caries formation and after resin infiltration. Surface hardness was measured by Vickers Micro Hardness Tester (Shimadzu, HMV-2). The differences in color and hardness among the groups were analyzed with ANOVA followed by Tukey test.

Results

Resin infiltration induced color changes and increased the hardness of demineralized enamel. After resin infiltration, there was no difference in color change (ΔE*) or microhardness among the groups (p < 0.05).

Conclusion

There was no difference in the effect of resin infiltration on color and hardness among groups with different extents of demineralization.

Citations

Citations to this article as recorded by  
  • Effect of CPP-ACPF, resin infiltration, and colloidal silica infiltration on surface microhardness of artificial white spot lesions in primary teeth: An in vitro study
    ArantaAvinash Chindane, AnilT Patil, B Sandhyarani
    Dental Research Journal.2022; 19(1): 52.     CrossRef
  • IMMEDIATE RESULT OF ICON INFILTRATION IN WHITE SPOT LESIONS CAUSED BY FLUOROSIS: A CASE REPORT
    Al-Sadi Abdulaziz Nasser Zain, P.M. Skrypnykov, V.I. Shynkevych, O.A. Pysarenko
    Ukrainian Dental Almanac.2022; (2): 34.     CrossRef
  • A comparative evaluation of penetration depth and surface microhardness of Resin Infiltrant, CPP-ACPF and Novamin on enamel demineralization after banding: an in vitro study
    Nishita Rana, Namita Singh, Shaila, Abi. M. Thomas, Rajan Jairath
    Biomaterial Investigations in Dentistry.2021; 8(1): 64.     CrossRef
  • Spectrophotometric Evaluation of Color Change in Tooth Enamel Defects Using Resin Infiltrate: An In Vivo Study
    Anil Gupta, Shikha Dogra, Sakshi Joshi, Vimanyu Kataria, Jyotika Saini, Monika Nagpal, Payal Narula
    International Journal of Clinical Pediatric Dentistry.2020; 13(2): 150.     CrossRef
  • Effect of Casein Phosphopeptide–amorphous Calcium Phosphate and Calcium Sodium Phosphosilicate on Artificial Carious Lesions: Anin vitroStudy
    Iqra Chaudhary, Abhay M Tripathi
    International Journal of Clinical Pediatric Dentistry.2017; 10(3): 261.     CrossRef
  • Effect of Resin Infiltration on Artificial Caries: Anin vitroEvaluation of Resin Penetration and Microhardness
    Deepesh Prajapati, Rashmi Nayak, Deepika Pai, Nagraj Upadhya, Vipin K Bhaskar, Pujan Kamath
    International Journal of Clinical Pediatric Dentistry.2017; 10(3): 250.     CrossRef
  • Application of quantitative light-induced fluorescence to determine the depth of demineralization of dental fluorosis in enamel microabrasion: a case report
    Tae-Young Park, Han-Sol Choi, Hee-Won Ku, Hyun-Su Kim, Yoo-Jin Lee, Jeong-Bum Min
    Restorative Dentistry & Endodontics.2016; 41(3): 225.     CrossRef
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Effects of matrix metallproteinases on dentin bonding and strategies to increase durability of dentin adhesion
Jung-Hyun Lee, Juhea Chang, Ho-Hyun Son
Restor Dent Endod 2012;37(1):2-8.   Published online March 2, 2012
DOI: https://doi.org/10.5395/rde.2012.37.1.2
AbstractAbstract PDFPubReaderePub

The limited durability of resin-dentin bonds severely compromises the longevity of composite resin restorations. Resin-dentin bond degradation might occur via degradation of water-rich and resin sparse collagen matrices by host-derived matrix metalloproteinases (MMPs). This review article provides overview of current knowledge of the role of MMPs in dentin matrix degradation and four experimental strategies for extending the longevity of resin-dentin bonds. They include: (1) the use of broad-spectrum inhibitors of MMPs, (2) the use of cross-linking agents for silencing the activities of MMPs, (3) ethanol wet-bonding with hydrophobic resin, (4) biomimetic remineralization of water-filled collagen matrix. A combination of these strategies will be able to overcome the limitations in resin-dentin adhesion.

Citations

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  • Remineralization Effects of Silver Fluoride, Silver Diamine Fluoride, and Sodium Fluoride Varnish
    Jihyeon Lee, Hwalim Lee, Jongsoo Kim, Joonhaeng Lee, Jongbin Kim, Jisun Shin, Miran Han
    International Journal of Clinical Preventive Dentistry.2024; 20(1): 19.     CrossRef
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  • 1 Crossref
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Elemental analysis of the fluoride varnish effects on root caries initiation
Se-Eun Park, Keewook Yi, Hae-Young Kim, Ho-Hyun Son, Juhea Chang
J Korean Acad Conserv Dent 2011;36(4):290-299.   Published online July 31, 2011
DOI: https://doi.org/10.5395/JKACD.2011.36.4.290
AbstractAbstract PDFPubReaderePub
Objectives

The usage of fluoride varnish for a moderate to low caries-risk group has not been well validated. This study aimed to evaluate the preventive and therapeutic efficacies of fluoride varnish on the initiated root caries.

Materials and Methods

Ten premolars were sectioned into quarters, further divided into two windows, one of which was painted with Fluor Protector (1,000 ppm fluoride, Ivoclar Vivadent). An initial lesion with a well-preserved surface layer was produced by pH cycling. Scanned line analysis using energy dispersive spectrometry determined the weight percentages of Ca and P in the demineralized layer. Scanning Electron microscopy and confocal laser scanning microscopy (CLSM) evaluated the varnish-applied root surfaces.

Results

The mean lesion depth (SD) was 12.3 (2.6) µm (single cycling) and 19.6 (3.8) µm (double cycling). Double cycling extended the lesion depth, but induced no more mineral loss than single cycling (p < 0.05). The mean weight percentages of Ca and P between groups with and without varnish were not significantly different (p < 0.05). A CLSM showed varnish remained within 15 µm of the surface layer.

Conclusions

When a mild acid challenge initiated root tissue demineralization, the application of low-concentration fluoride varnish did not influence the lesion depth or the mineral composition of the subsurface lesion.

Citations

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  • The combined occluding effect of sodium fluoride varnish and Nd:YAG laser irradiation on dentinal tubules—A CLSM and SEM study
    Samet Tosun, Emre Culha, Ugur Aydin, Abdul Semih Ozsevik
    Scanning.2016; 38(6): 619.     CrossRef
  • How to designin situstudies: an evaluation of experimental protocols
    Young-Hye Sung, Hae-Young Kim, Ho-Hyun Son, Juhea Chang
    Restorative Dentistry & Endodontics.2014; 39(3): 164.     CrossRef
  • Evaluation of release of fluoride from dental varnishes marketed in Korea
    Han-Na Kim, Myung-Su Jeong, Se-Yeon Kim, Jin-Bom Kim, Seung-Hwa Jeong
    Journal of Korean Academy of Oral Health.2014; 38(3): 131.     CrossRef
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Pulp tissue regeneration and root formation of permanent teeth with pulpal/periapical deseases
Yeon-Jee Yoo, Seung-Ho Baek, Ho-Hyun Son
J Korean Acad Conserv Dent 2010;35(4):238-245.   Published online July 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.4.238
AbstractAbstract PDFPubReaderePub

Numerous cases about additional growth of roots or pulp tissue regeneration by using various intracanal medicaments in immature permanent teeth with periapical or pulpal disease have been reported. The underlying mechanism has not been clearly delineated, but it has been widely accepted that undifferentiated mesenchymal cells and stem cells are involved. Moreover, the growth and deposition of osteoid or cementoid tissues have been observed in regenerated pulp and roots. This new and non-invasive treatment has brightened the future of endodontics, and enlarged the vision of regenerative root canal treatment with multi-potent stem cells and various tissue engineering techniques.

Citations

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  • Platelet rich fibrin - a novel acumen into regenerative endodontic therapy
    Kavita Hotwani, Krishna Sharma
    Restorative Dentistry & Endodontics.2014; 39(1): 1.     CrossRef
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Influence of rebonding procedures on microleakage of composite resin restorations
Mi-Ae Lee, Duck-Kyu Seo, Ho-Hyun Son, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2010;35(3):164-172.   Published online May 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.3.164
AbstractAbstract PDFPubReaderePub

During a composite resin restoration, an anticipating contraction gap is usually tried to seal with low-viscosity resin after successive polishing, etching, rinsing and drying steps, which as a whole is called rebonding procedure. However, the gap might already have been filled with water or debris before applying the sealing resin. We hypothesized that microleakage would decrease if the rebonding agent was applied before the polishing step, i.e., immediately after curing composite resin. On the buccal and lingual surfaces of 35 extracted human molar teeth, class V cavities were prepared withthe occlusal margin in enamel and the gingival margin in dentin. They were restored with a hybrid composite resin Z250 (3M ESPE, USA) using an adhesive AdperTM Single Bond 2 (3M ESPE). As rebonding agents, BisCover LV (Bisco, USA), ScotchBond Multi-Purpose adhesive (3M ESPE) and an experimental adhesive were applied on the restoration margins before polishing step or after successive polishing and etching steps. The infiltration depth of 2% methylene blue into the margin was measured using an optical stereomicroscope. The correlation between viscosity of rebonding agents and mciroleakage was also evaluated. There were no statistically significant differences in the microleakage within the rebonding procedures, within the rebonding agents, and within the margins. However, when the restorations were not rebonded, the microleakage at gingival margin was significantly higher than those groups rebonded with 3 agents (p < 0.05). The difference was not observed at the occlusal margin. No significant correlation was found between viscosity of rebonding agents and microleakage, except very weak correlation in case of rebonding after polishing and etching at gingival margin (r = -0.326, p = 0.041).

Citations

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  • Antibacterial effect of self-etching adhesive systems onStreptococcus mutans
    Seung-Ryong Kim, Dong-Hoon Shin
    Restorative Dentistry & Endodontics.2014; 39(1): 32.     CrossRef
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Comparison of operative techniques between female and male dentists in class 2 and class 5 resin composite restorations
Juhea Chang, Hae-Young Kim, Ho-Hyun Son
J Korean Acad Conserv Dent 2010;35(2):116-124.   Published online March 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.2.116
AbstractAbstract PDFPubReaderePub

This study aimed to assess whether the gender of the dental practitioner affects operative techniques in class 2 and class 5 resin composite restorations. In 2008, a nationwide survey was given to Korean dentists. Total 12,193 e-mails were distributed, 2,632 were opened by recipients, and 840 responses were collected. Of the respondents, 78.9% were male and 21.1% were female. The gender distribution in the age groups between respondents and the total population did not differ (p > 0.05). A chi-square test was used to compare technical differences between female and male dentists. A multiple logistic regression analysis was performed to assess the association between gender and operative techniques in resin composite restoration. For class 2 resin composite restoration, female dentists were 1.87 times more likely than male dentists to do multiple incremental fillings (four layers or more) and 2.72 times more likely than males to spend 30 minutes or more for the treatment (p < 0.05). For class 5 resin composite restoration, female dentists were 2.69 times more likely than their male counterparts to use a cavity base or liner, 1.83 times more likely to do multiple incremental fillings (four layers or more) and 1.63 times more likely to spend 20 minutes or more for the procedure (p < 0.05). The gender factor was influential to individual operative techniques in restorative treatment.

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Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives
So-Rae Seong, Duck-kyu Seo, In-Bog Lee, Ho-Hyun Son, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2010;35(2):125-133.   Published online March 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.2.125
AbstractAbstract PDFPubReaderePub
Objectives

Rapid polymerization of overlying composite resin causes high polymerization shrinkage stress at the adhesive layer. In order to alleviate the shrinkage stress, increasing the light intensity over the first 5 seconds was suggested as an exponential curing mode by an LED light curing unit (Elipar FreeLight2, 3M ESPE). In this study, the effectiveness of the exponential curing mode on reducing stress was evaluated with measuring microtensile bond strength of three adhesives after the overlying composite resin was polymerized with either continuous or exponential curing mode.

Methods

Scotchbond Multipurpose Plus (MP, 3M ESPE), Single Bond 2 (SB, 3M ESPE), and Adper Prompt (AP, 3M ESPE) were applied onto the flat occlusal dentin of extracted human molar. The overlying hybrid composite (Denfil, Vericom, Korea) was cured under one of two exposing modes of the curing unit. At 48h from bonding, microtensile bond strength was measured at a crosshead speed of 1.0 mm/min. The fractured surfaces were observed under FE-SEM.

Results

There was no statistically significant difference in the microtensile bond strengths of each adhesive between curing methods (Two-way ANOVA, p > 0.05). The microtensile bond strengths of MP and SB were significantly higher than that of AP (p < 0.05). Mixed failures were observed in most of the fractured surfaces, and differences in the failure mode were not observed among groups.

Conclusion

The exponential curing method had no beneficial effect on the microtensile dentin bond strengths of three adhesives compared to continuous curing method.

Citations

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  • The effect of the strength and wetting characteristics of Bis-GMA/TEGDMA-based adhesives on the bond strength to dentin
    Eun-Sook Park, Chang-Keun Kim, Ji-Hyun Bae, Byeong-Hoon Cho
    Journal of Korean Academy of Conservative Dentistry.2011; 36(2): 139.     CrossRef
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A survey on the use of composite resin in Class II restoration in Korea
Dong-Ho Shin, Se-Eun Park, In-Seok Yang, Juhea Chang, In-Bog Lee, Byeong-Hoon Cho, Ho-Hyun Son
J Korean Acad Conserv Dent 2009;34(2):87-94.   Published online March 31, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.2.087
AbstractAbstract PDFPubReaderePub

The purpose of this study was to assess the current materials, methods and difficulties according to the year of licence and educational background of Korean dentists in Class II direct composite resin restorations.

Total 17 questions were included in the questionnaire. Questions were broadly divided into two parts; first, operator's information, and second, the materials and methods used in Class II posterior composite restoration. The questionnaire was sent to dentists enrolled in Korean Dental Association via e-mail. Total 12,193 e-mails were distributed to dentists, 2,612 e-mails were opened, and 840 mails (32.2%) were received from respondents. The data was statically analyzed by chi-square test using SPSS(v. 12.0.1, SPSS Inc, Chicago, IL, USA).

Male dentists among respondents was 79%. 60.3% of the respondents acquired their licences recently (1998-2007), and 77% practiced in private offices. 83.4% have acquired their knowledge through school lectures, conferences and seminars.

For the Class II restorations, gold inlays were preferred by 65.7% of respondents, while direct composite resin restorations were used by 12.1% amalgam users were only 4.4% of respondents.

For the restorative technique, 74.4% of respondents didn't use rubber dam as needed. For the matrix, mylar strip (53.4%), metal matrix (33.8%) and Palodent system (6.5%) were used. 99.6% of respondents restored the Class II cavity by incremental layering.

Obtaining of the tight interproximal contact was considered as the most difficult procedure (57.2%) followed by field isolation (21%).

Among various bonding systems, 22.6% of respondents preferred SE Bond and 20.2% used Single Bond. Z-250 was used most frequently among a variety of composite resins.

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  • A review of dental antibacterial agents and antibacterial modification of composite resins and dentin adhesives
    Hojin Moon
    Korean Journal of Dental Materials.2024; 51(4): 189.     CrossRef
  • Comparison of operative techniques between female and male dentists in class 2 and class 5 resin composite restorations
    Juhea Chang, Hae-Young Kim, Ho-Hyun Son
    Journal of Korean Academy of Conservative Dentistry.2010; 35(2): 116.     CrossRef
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THE EFFECT OF PRIMING ETCHED DENTIN WITH SOLVENT ON THE MICROTENSILE BOND STRENGTH OF HYDROPHOBIC DENTIN ADHESIVE
Eun-Sook Park, Ji-Hyun Bae, Jong-Soon Kim, Jae-Hoon Kim, In-Bog Lee, Chang-Keun Kim, Ho-Hyun Son, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2009;34(1):42-50.   Published online January 14, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.1.042
AbstractAbstract PDFPubReaderePub
Abstract

Deterioration of long-term dentin adhesion durability is thought to occur by hydrolytic degradation within hydrophilic domains of the adhesive and hybrid layers. This study investigated the hypothesis that priming the collagen network with an organic solvent displace water without collapse and thereby obtain good bond strength with an adhesive made of hydrophobic monomers and organic solvents. Three experimental adhesives were prepared by dissolving two hydrophobic monomers, bisphenol-A-glycidylmethacrylate (Bis-GMA) and triethylenegly-col dimethacrylate (TEGDMA), into acetone, ethanol or methanol. After an etching and rinsing procedure, the adhesives were applied onto either wet dentin surfaces (wet bonding) or dentin surfaces primed with the same solvent (solvent-primed bonding). Microtensile bond strength (MTBS) was measured at 48 hrs, 1 month and after 10,000 times of thermocycles. The bonded interfaces were evaluated using a scanning electron microscope (SEM). Regardless of bonding protocols, well-developed hybrid layers were observed at the bonded interface in most specimens. The highest mean MTBS was observed in the adhesive containing ethanol at 48 hrs. With solvent-primed bonding, increased MTBS tendencies were seen with thermocycling in the adhesives containing ethanol or methanol. However, in the case of wet bonding, no increase in MTBS was observed with aging.

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Quantitative comparison of permeability in the adhesive interface of four adhesive systems
Juhea Chang, Keewook Yi, Hae-Young Kim, In Bog Lee, Byeong Hoon Cho, Ho-Hyun Son
J Korean Acad Conserv Dent 2009;34(1):51-60.   Published online January 31, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.1.051
AbstractAbstract PDFPubReaderePub

The purpose of this study was to perform quantitative comparisons of water permeable zones in both the adhesive and the hybrid layer before and after thermocycling in order to assess the integrity of the bonding interface. Twenty eight flat dentin surfaces were bonded with a light-cured composite resin using one of four commercial adhesives [OptiBond FL (OP), AdheSE (AD), Clearfil SE Bond (CL), and Xeno III (XE)]. These were sectioned into halves and subsequently cut to yield 2-mm thick specimens; one specimen for control and the other subjected to thermocycling for 10,000 cycles. After specimens were immersed in ammoniacal silver nitrate for 24 h and exposed to a photo developing solution for 8 h, the bonded interface was analyzed by scanning electron microscopy (SEM) and wavelength dispersive spectrometry (WDS) at five locations per specimen. Immediately after bonding, the adhesive layer of OP showed the lowest silver uptake, followed by CL, AD, and XE in ascending order (p < 0.0001); the hybrid layer of CL had the lowest silver content among the groups (p = 0.0039). After thermocycling, none of the adhesives manifested a significant increase of silver in either the adhesive or the hybrid layer. SEM demonstrated the characteristic silver penetrated patterns within the interface. It was observed that integrity of bonding was well maintained in OP and CL throughout the thermocycling process. Adhesive-tooth interfaces are vulnerable to hydrolytic degradation and its permeability varies in different adhesive systems, which may be clinically related to the restoration longevity.

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Shear bond strength of dentin bonding agents cured with a Plasma Arc curing light
Youngchul Kwon, Sun-Young Kim, Sae-Joon Chung, Young-Chul Han, In-Bog Lee, Ho-Hyun Son, Chung-Moon Um, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2008;33(3):213-223.   Published online May 31, 2008
DOI: https://doi.org/10.5395/JKACD.2008.33.3.213
AbstractAbstract PDFPubReaderePub

The objective of this study was to compare dentin shear bond strength (DSBS) of dentin bonding agents (DBAs) cured with a plasma arc (PAC) light curing unit (LCU) and those cured with a light emitting diode (LED) LCU. Optical properties were also analyzed for Elipar freelight 2 (3M ESPE); LED LCU, Apollo 95E (DMT Systems); PAC LCU and VIP Junior (Bisco); Halogen LCU. The DBAs used for DSBS test were Scotchbond Multipurpose (3M ESPE), Singlebond 2 (3M ESPE) and Clearfil SE Bond (Kuraray). After DSBS testing, fractured specimens were analyzed for failure modes with SEM.

The total irradiance and irradiance between 450 nm and 490 nm of the LCUs were different. LED LCU showed narrow spectral distribution around its peak at 462 nm whereas PAC and Halogen LCU showed a broad spectrum. There were no significant differences in mean shear bond strength among different LCUs (P > 0.05) but were significant differences among different DBAs (P < 0.001)

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  • Temperature changes under demineralized dentin during polymerization of three resin-based restorative materials using QTH and LED units
    Sayed-Mostafa Mousavinasab, Maryam Khoroushi, Mohammadreza Moharreri, Mohammad Atai
    Restorative Dentistry & Endodontics.2014; 39(3): 155.     CrossRef
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Development of nano-fluid movement measuring device and its application to hydrodynamic analysis of dentinal fluid
In-Bog Lee, Min-Ho Kim, Sun-Young Kim, Juhea Chang, Byung-Hoon Cho, Ho-Hyun Son, Seung-Ho Back
J Korean Acad Conserv Dent 2008;33(2):141-147.   Published online March 31, 2008
DOI: https://doi.org/10.5395/JKACD.2008.33.2.141
AbstractAbstract PDFPubReaderePub

This study was aimed to develop an instrument for real-time measurement of fluid conductance and to investigate the hydrodynamics of dentinal fluid. The instrument consisted of three parts; (1) a glass capillary and a photo sensor for detection of fluid movement, (2) a servo-motor, a lead screw and a ball nut for tracking of fluid movement, (3) a rotary encoder and software for data processing.

To observe the blocking effect of dentinal fluid movement, oxalate gel and self-etch adhesive agent were used. BisBlock (Bisco) and Clearfil SE Bond (Kuraray) were applied to the occlusal dentin surface of extracted human teeth. Using this new device, the fluid movement was measured and compared between before and after each agent was applied.

The instrument was able to measure dentinal fluid movement with a high resolution (0.196 nL) and the flow occurred with a rate of 0.84 to 15.2 nL/s before treatment. After BisBlock or Clearfil SE Bond was used, the fluid movement was decreased by 39.8 to 89.6%.

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  • Nanoleakage of apical sealing using a calcium silicate-based sealer according to canal drying methods
    Yoon-Joo Lee, Kyung-Mo Cho, Se-Hee Park, Yoon Lee, Jin-Woo Kim
    Restorative Dentistry & Endodontics.2024;[Epub]     CrossRef
  • CPNE7 Induces Biological Dentin Sealing in a Dentin Hypersensitivity Model
    S.H. Park, Y.S. Lee, D.S. Lee, J.C. Park, R. Kim, W.J. Shon
    Journal of Dental Research.2019; 98(11): 1239.     CrossRef
  • Effect of oral health-related factors on oral health knowledge, attitude, and practice of college students
    Su Bin Lee, Jeong Weon Yoon, Mi Gyung Seong, Min Kyung Lee, Ye Hwang Kim, Jung Hwa Lee
    Journal of Korean Academy of Oral Health.2018; 42(4): 124.     CrossRef
  • Real-time measurement of dentinal fluid flow during desensitizing agent application
    Sun-Young Kim, Eun-Joo Kim, In-Bog Lee
    Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 313.     CrossRef
  • Real-time measurement of dentinal tubular fluid flow during and after amalgam and composite restorations
    Sun-Young Kim, Byeong-Hoon Cho, Seung-Ho Baek, Bum-Sun Lim, In-Bog Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(6): 467.     CrossRef
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The nanoleakage patterns of experimental hydrophobic adhesives after load cycling
Suh-Jin Sohn, Ju-Hae Chang, Suk-Ho Kang, Hyun-Mi Yoo, Byeong-Hoon Cho, Ho-Hyun Son
J Korean Acad Conserv Dent 2008;33(1):9-19.   Published online January 31, 2008
DOI: https://doi.org/10.5395/JKACD.2008.33.1.009
AbstractAbstract PDFPubReaderePub

The purpose of this study was: (1) to compare nanoleakage patterns of a conventional 3-step etch and rinse adhesive system and two experimental hydrophobic adhesive systems and (2) to investigate the change of the nanoleakage patterns after load cycling. Two kinds of hydrophobic experimental adhesives, ethanol containing adhesive (EA) and methanol containing adhesive (MA), were prepared. Thirty extracted human molars were embedded in resin blocks and occlusal thirds of the crowns were removed. The polished dentin surfaces were etched with a 35% phosphoric acid etching gel and rinsed with water. Scotchbond Multi-Purpose (MP), EA and MA were used for bonding procedure. Z-250 composite resin was built-up on the adhesive-treated surfaces. Five teeth of each dentin adhesive group were subjected to mechanical load cycling. The teeth were sectioned into 2 mm thick slabs and then stained with 50% ammoniacal silver nitrate. Ten specimens for each group were examined under scanning electron microscope in backscattering electron mode. All photographs were analyzed using image analysis software. Three regions of each specimen were used for evaluation of the silver uptake within the hybrid layer. The area of silver deposition was calculated and expressed in gray value. Data were statistically analyzed by two-way ANOVA and post-hoc testing of multiple comparisons was done with the Scheffe's test. Silver particles were observed in all the groups. However, silver particles were more sparsely distributed in the EA group and the MA group than in the MP group (p < .0001). There were no changes in nanoleakage patterns after load cycling.

Citations

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  • The effect of the removal of chondroitin sulfate on bond strength of dentin adhesives and collagen architecture
    Jong-Ryul Kim, Sang-Jin Park, Gi-Woon Choi, Kyoung-Kyu Choi
    Journal of Korean Academy of Conservative Dentistry.2010; 35(3): 211.     CrossRef
  • The effect of priming etched dentin with solvent on the microtensile bond strength of hydrophobic dentin adhesive
    Eun-Sook Park, Ji-Hyun Bae, Jong-Soon Kim, Jae-Hoon Kim, In-Bog Lee, Chang-Keun Kim, Ho-Hyun Son, Byeong-Hoon Cho
    Journal of Korean Academy of Conservative Dentistry.2009; 34(1): 42.     CrossRef
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A study of APin-protein interactions using protein microarray
Joo-Cheol Park, Sun-Hwa Park, Heung-Joong Kim, Jong-Tae Park, Seong-Ho Youn, Ji-Woong Kim, Tae-Yeon Lee, Ho-Hyun Son
J Korean Acad Conserv Dent 2007;32(5):459-468.   Published online September 30, 2007
DOI: https://doi.org/10.5395/JKACD.2007.32.5.459
AbstractAbstract PDFPubReaderePub

Protein microarray or protein chips is potentially powerful tools for analysis of protein-protein interactions. APin cDNA was previously identified and cloned from a rat odontoblast cDNA library. The purpose of this study was to investigate the APin-protein interactions during ameloblast differentiation. Protein microarray was carried with recombinant APin protein and MEF2, Aurora kinase A, BMPR-IB and EF-hand calcium binding protein were selected among 74 interacting proteins. Immortalized ameloblast cells (ALCs) were transfected with pCMV-APin construct and U6-APin siRNA construct. After transfection, the expression of the mRNAs for four proteins selected by protein micoarrays were assessed by RT-PCR.

The results were as follows:

1. APin expression was increased and decreased markedly after its over-expression and inactivation, respectively.

2. Over-expression of the APin in the ALCs markedly down-regulated the expression of MEF2 and Aurora kinase A, whereas their expression remained unchanged by its inactivation.

3. Expression of BMPR-IB and EF-hand calcium binding protein were markedly increased by the overexpression of the APin in the ALCs, whereas expression of BMPR-IB remained unchanged and expression of EF-hand calcium binding protein was markedly decreased by its inactivation.

These results suggest that APin plays an important role in ameloblast differentiation and mineralization by regulating the expression of MEF2, Aurora kinase A, BMPR-IB and EF-hand calcium binding protein.

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Expression and function of OD314, Apin protein during ameloblast differentiation and amelogenesis
Jong-Tae Park, Yong-Seok Choi, Heung-Joong Kim, Moon-Jin Jeong, Hyun-Ju Oh, In-Cheol Shin, Joo-Cheol Park, Ho-Hyun Son
J Korean Acad Conserv Dent 2006;31(6):437-444.   Published online November 30, 2006
DOI: https://doi.org/10.5395/JKACD.2006.31.6.437
AbstractAbstract PDFPubReaderePub

This study was aimed to elucidate the biological function of OD314 (Apin protein), which is related toameloblast differentiation and amelogenesis. Apin protein, calcifying epithelial odontogenic (pindborg) tumors (CEOTs)-associated amyloid, were isolated from CEOTs, and has similar nucleotide sequences to OD314. We examined expression of the OD314 mRNA using in-situ hybridization during tooth development in mice. Expression of OD314 and several enamel matrix proteins were examined in the cultured ameloblast cell line up to 28 days by reverse transcription-polymerase chain reaction (RT-PCR) amplification. After inactivation and over-expression of the OD314 gene in ameloblast cell lines using U6 vector-driven RNA interference and CMV-OD314 construct, RT-PCR were performed to evaluate the effect of the OD314 during amelogenesis.

The results were as follows:

1. In in-situ hybridization, OD314 mRNAs were more strongly expressed in ameloblast than odontoblast.

2. When ameloblast cells were cultured in the differentiation and mineralization medium for 28 days, the tuftelin mRNA expression was maintained from the beginning to day 14, and then gradually decreased to day 28. The expressions of amelogenin and enamelin were gradually decreased according to the ameloblast differentiation.

3. Inactivation of OD314 by U6-OD314 siRNA construct down-regulated the expression of OD314, MMP-20, and tuftelin, whereas over-expression of OD314 by CMV-OD314 construct up-regulated the expression of OD314 and MMP-20 without change in tuftelin.

These results suggest that OD314 is considered as an ameloblast-enriched gene and may play the important roles in ameloblast differentiation and mineralization.

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A clinical evaluation of a bleaching strip containing 2.9% hydrogen peroxide
Eun-Sook Park, So-Rae Seong, Seong-Tae Hong, Ji-Eun Kim, So-Young Lee, Soo-Youn Hwang, Shin-Jae Lee, Bo-Hyoung Jin, Ho-Hyun Son, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2006;31(4):269-281.   Published online July 31, 2006
DOI: https://doi.org/10.5395/JKACD.2006.31.4.269
AbstractAbstract PDFPubReaderePub

This study evaluated the effectiveness and safety of an experimental bleaching strip (Medison dental whitening strip, Samsung medical Co., Anyang, Korea) containing 2.9% hydrogen peroxide. Twenty-three volunteers used the bleaching strips for one and a half hour daily for 2 weeks. As control group, the same strips in which hydrogen peroxide was not included were used by 24 volunteers with the same protocol. The shade change (ΔE*, color difference) of twelve anterior teeth was measured using Shade Vision (X-Rite Inc., S.W. Grandville, MI, USA), Chroma Meter (Minolta Co., Ltd. Osaka, Japan) and Vitapan classical shade guide (Vita Zahnfabrik, Germany). The shade change of overall teeth in the experimental group was significantly greater than that in the control group (p < 0.05) and was easily perceivable. The change resulted from the increase of lightness (CIE L* value) and the decrease of redness (CIE a* value) and yellowness (CIE b* value). The shade change of individual tooth was greatest in canine, and smallest in central incisor. The safety of the bleaching strip was also confirmed.

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  • Effects of Citrus limon Extract on Oxidative Stress-Induced Nitric Oxide Generation and Bovine Teeth Bleaching
    Soon-Jeong Jeong
    Journal of Dental Hygiene Science.2021; 21(2): 96.     CrossRef
  • Efficacy of a self - applied paint - on whitening gel combined with wrap
    Soo-Yeon Kim, Jae-Hyun Ahn, Ji-Young Kim, Jin-Woo Kim, Se-Hee Park, Kyung-Mo Cho
    Journal of Dental Rehabilitation and Applied Science.2018; 34(3): 175.     CrossRef
  • Effects of a whitening strip combined with a desensitizing primer on tooth color
    Hae-Eun Shin, Sang-Uk Im, Eun-Kyung Kim, Jong-Hun Kim, Jae-Hyun Ahn, Youn-Hee Choi, Keun-Bae Song
    Journal of Korean Academy of Oral Health.2016; 40(1): 31.     CrossRef
  • A clinical evaluation of efficacy of an office bleaching gel containing 30% hydrogen peroxide
    Sin-Young Kim, Je-Uk Park, Chang-Hyen Kim, Sung-Eun Yang
    Journal of Korean Academy of Conservative Dentistry.2010; 35(1): 40.     CrossRef
  • The evaluation of clinical efficacy and longevity of home bleaching without combined application of In-office bleaching
    Byunk-Gyu Shin, Sung-Eun Yang
    Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 387.     CrossRef
  • Effect of the bleaching light on whitening efficacy
    Jong-Hyun Park, Hye-Jin Shin, Deok-Young Park, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
    Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 95.     CrossRef
  • Clinical study of shade improvement and safety of polymer-based pen type BlancTic Forte whitening agent containing 8.3% Carbamide peroxide
    Jin-Kyung Lee, Sun-Hong Min, Sung-Tae Hong, So-Ram Oh, Shin-Hye Chung, Young-Hye Hwang, Sung-Yeop You, Kwang-Shik Bae, Seung-Ho Baek, Woo-Cheol Lee, Won-Jun Son, Kee-Yeon Kum
    Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 154.     CrossRef
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Prospective clinical evaluation of three different bonding systems in class V resin restorations with or without mechanical retention
Kyung-Wook Lee, Sae-Joon Choung, Young-Chul Han, Ho-Hyun Son, Chung-Moon Um, Myoung-Hwan Oh, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2006;31(4):300-311.   Published online July 31, 2006
DOI: https://doi.org/10.5395/JKACD.2006.31.4.300
AbstractAbstract PDFPubReaderePub

The purpose of this study is to evaluate prospectively the effect of different bonding systems and retention grooves on the clinical performance of resin restorations in non-carious cervical lesions (NCCLs). Thirty-nine healthy adults who had at least 2 NCCLs in their premolar areas were included in this study. One hundred and fifty teeth were equally assigned to six groups: (A) Scotchbond Multi-Purpose (SBMP, 3M ESPE, St. Paul, MN, USA, 4th generation bonding system) without retention grooves; (B) SBMP with retention grooves; (C) BC Plus (Vericom Co., Anyang, Gyeonggido, Korea, 5th generation bonding system) without retention grooves; (D) BC Plus with retention grooves; (E) Adper Prompt (3M ESPE, Seefeld, Germany, 6th generation bonding system) without retention grooves; (F) Adper Prompt with retention grooves. All cavities were filled with a hybrid composite resin, Denfil (Vericom Co., Anyang, Gyeonggido, Korea) by one operator. Restorations were evaluated at baseline and at 6-month recall, according to the modified USPHS (United States Public Health Service) criteria. Additionally, clinical photographs were taken and epoxy resin replicas were made for SEM evaluation. At 6-month recall, there were some differences in the number of alpha ratings among the experimental groups. But, despite the differences in the number of alpha ratings, there was no significant difference among the 3 adhesive systems (p > 0.05). There was also no significant difference between the groups with or without mechanical retention (p > 0.05). Follow-ups for longer periods than 6 months are needed to verify the clinical performance of different bonding systems and retention grooves.

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  • Comparison of marginal microleakage between low and high flowable resins in class V cavity
    Sang-Bae Bae, Young-Gon Cho, Myeong-Seon Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(6): 477.     CrossRef
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Effect of additional coating of bonding resin on the microtensile bond strength of self-etching adhesives to dentin
Moon-Kyung Jung, Byeong-Hoon Cho, Ho-Hyun Son, Chung-Moon Um, Young-Chul Han, Sae-Joon Choung
J Korean Acad Conserv Dent 2006;31(2):103-112.   Published online January 14, 2006
DOI: https://doi.org/10.5395/JKACD.2006.31.2.103
AbstractAbstract PDFPubReaderePub
Abstract

This study investigated the hypothesis that the dentin bond strength of self-etching adhesive (SEA) might be improved by applying additional layer of bonding resin that might alleviate the pH difference between the SEA and the restorative composite resin. Two SEAs were used in this study; Experimental SEA (Exp, pH: 1.96) and Adper Prompt (AP, 3M ESPE, USA, pH: 1.0). In the control groups, they were applied with two sequential coats. In the experimental groups, after applying the first coat of assigned SEAs, the D/E bonding resin of All-Bond 2 (Bisco Inc., USA, pH: 6.9) was applied as the intermediate adhesive. Z-250 (3M ESPE, USA) composite resin was built-up in order to prepare hourglass-shaped specimens. The microtensile bond strength (MTBS) was measured and the effect of the intermediate layer on the bond strength was analyzed for each SEA using t-test. The fracture mode of each specimen was inspected using stereomicroscope and Field Emission Scanning Electron Microscope (FE-SEM). When D/E bonding resin was applied as the second coat, MTBS was significantly higher than that of the control groups. The incidence of the failure between the adhesive and the composite or between the adhesive and dentin decreased and that of the failure within the adhesive layer increased. According to the results, applying the bonding resin of neutral pH can increase the bond strength of SEAs by alleviating the difference in acidity between the SEA and restorative composite resin.

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  • Effect of an intermediate bonding resin and flowable resin on the compatibility of two-step total etching adhesives with a self-curing composite resin
    Sook-Kyung Choi, Ji-Wan Yum, Hyeon-Cheol Kim, Bock Hur, Jeong-Kil Park
    Journal of Korean Academy of Conservative Dentistry.2009; 34(5): 397.     CrossRef
  • Aging effect on the microtensile bond strength of self-etching adhesives
    JS Park, JS Kim, MS Kim, HH Son, HC Kwon, BH Cho
    Journal of Korean Academy of Conservative Dentistry.2006; 31(6): 415.     CrossRef
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MMP and TIMP production in periodontal ligament fibroblasts stimulated by Prevotella nigrescens lipopolysaccharide
Won-Kyung Yang, WooCheol Lee, Mi-Ri Kim, Ho-Hyun Son
J Korean Acad Conserv Dent 2005;30(5):372-384.   Published online September 30, 2005
DOI: https://doi.org/10.5395/JKACD.2005.30.5.372
AbstractAbstract PDFPubReaderePub

The purpose of this study was to monitor the secretion of matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase (TIMP) by human periodontal ligament (PDL) fibroblasts stimulated with Prevotella nigrescens lipopolysaccharide (LPS), and to examine the effect of calcium hydroxide treatment on P. nigrescens LPS.

LPS was extracted and purified from anaerobically cultured P. nigrescens. PDL fibroblasts were stimulated by the LPS (0, 0.1, 1, 10 ug/ml) or LPS (10 ug/ml) pretreated with 12.5 mg/ml of Ca(OH)2 for 3 days, for various periods of time (12, 24, 48 h). Immunoprecipitation were performed for protein level analysis of MMP-1, MMP-2 and TIMP-1. Total RNA was isolated and real-time quantitative polymerase chain reaction (PCR) was performed for quantification of MMP-1 mRNA.

According to this study, the results were as follows:

1. The production of MMP-1 by stimulation with P. nigrescens LPS increased in time-dependent manner, and showed maximum value at 48 h in both protein and mRNA level. But there was no dose-dependent increase.

2. MMP-2 production time-dependently increased when stimulated with 1 and 10 ug/ml LPS, but there was no dose-dependent increase.

3. TIMP-1 production increased to 24 h, but decreased at 48 h. It increased when stimulated with 0.1 and 1 ug/ml LPS, but suppressed at 10 ug/ml.

4. P. nigrescens LPS pretreated with Ca(OH)2 markedly downregulated MMP-1 gene expression.

Citations

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  • Anti-inflammatory effects of PPARγ on human dental pulp cells
    Jeong-Hee Kim
    Journal of Korean Academy of Conservative Dentistry.2006; 31(3): 203.     CrossRef
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Expression of OD314 during ameloblast differentiation and maturation
Joo-Cheol Park, Seong-Min Ahn, Heung-Joong Kim, Moon-Jin Jeong, Min-Ju Park, In-Cheol Shin, Ho-Hyun Son
J Korean Acad Conserv Dent 2005;30(5):423-431.   Published online September 30, 2005
DOI: https://doi.org/10.5395/JKACD.2005.30.5.423
AbstractAbstract PDFPubReaderePub

Ameloblasts are responsible for the formation and maintenance of enamel which is an epithelially derived protective covering for teeth. Ameloblast differentiation is controlled by sequential epithelial-mesenchymal interactions. However, little is known about the differentiation and maturation mechanisms. OD314 was firstly identified from odontoblasts by subtraction between odontoblast/pulp cells and osteoblast/dental papilla cells, even though OD314 protein was also expressed in ameloblast during tooth formation.

In this study, to better understand the biological function of OD314 during amelogenesis, we examined expression of the OD314 mRNA and protein in various stages of ameloblast differentiation using in-situ hybridization and immunohistochemistry.

The results were as follows :

1. The ameloblast showed 4 main morphological and functional stages referred to as the presecretory, secretory, smooth-ended, and ruffle-ended.

2. OD314 mRNA was expressed in secretory ameloblast and increased according to the maturation of the cells.

3. OD314 protein was not expressed in presecretory ameloblast but expressed in secretory ameloblast and maturative ameloblast. OD314 protein was distributed in entire cytoplasm of secretory ameloblast. However, OD314 was localized at the proxiamal and distal portion of the cytoplasm of smooth-ended and ruffle-ended ameloblast.

These results suggest that OD314 may play important roles in the ameloblast differentiation and maturation.

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The effect of NaOCl treatment and sterilization procedures on the corrosion of endodontic files
Won-Kyung Yang, Yoon-Sik Ra, Young-Kyoo Lee, Ho-Hyun Son, Mi-Ri Kim
J Korean Acad Conserv Dent 2005;30(2):121-127.   Published online March 31, 2005
DOI: https://doi.org/10.5395/JKACD.2005.30.2.121
AbstractAbstract PDFPubReaderePub

A variety files made of stainless steel (S-S) or nickel-titanium (Ni-Ti) are used during endodontic treatment. The purpose of this study was to evaluate the corrosion susceptibility of S-S and Ni-Ti endodontic files. Three brands of files were used for this study: K-flex® S-S files (Maillefer, USA), Profile® Ni-Ti files (Maillefer, USA), K-3® Ni-Ti files (SybronEndo, USA). 120 files of each brands (21mm, ISO size #20) were divided into 12 groups according to 1) sterilization methods using Autoclave or Ethylene Oxide (E-O) gas, 2) Irrigation solutions using 5.25 % NaOCl or Saline, 3) the number of sterilization (1, 5, 10 times). After above procedures, each of the files was inspected by three examiners with a light microscope and camera at X25. Each file was judged and ranked according to the following criteria: 0; no corrosion, 1; mild corrosion, 2; moderate corrosion, and 3; severe corrosion. The files of high score were examined under the Scanning Electron Microscope.

Data were statistically analyzed with the Kruskal-Wallis test (p < 0.05). Most of the ten time-autoclaved files had showed mild to moderate corrosion. But, one or five time-autoclaved files did not show corrosive surface. NaOCl treatment and E-O gas sterilization did not influence on corrosion. There was a significant difference in corrosion susceptibility between sterilization methods and the number of autoclaving. However, there was no significant difference between brands and file materials.

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  • Comparison of Various Cold Sterilization Techniques on Routinely used Carbide Burs and Diamond Points
    Suganthi Ranganathan, Supriya Manvi, Srivatsa Gopalakrishna, Chaitra Koppal Renukanath
    International Journal of Prosthodontics and Restorative Dentistry.2017; 7(3): 97.     CrossRef
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Rheological characterization of composites using a vertical oscillation rheometer
In-Bog Lee, Byung-Hoon Cho, Ho-Hyun Son, Sang-Tag Lee, Chung-Moon Um
J Korean Acad Conserv Dent 2004;29(6):489-497.   Published online November 30, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.6.489
AbstractAbstract PDFPubReaderePub
Objective

The purpose of this study was to investigate the viscoelastic properties related to handling characteristics of composite resins.

Methods

A custom designed vertical oscillation rheometer (VOR) was used for rheological measurements of composites. The VOR consists of three parts: (1) a measuring unit, (2) a deformation induction unit and (3) a force detecting unit. Two medium viscous composites, Z100 and Z250 and two packable composites, P60 and SureFil were tested. The viscoelastic material function, including complex modulus E* and phase angle δ, were measured. A dynamic oscillatory test was used to evaluate the storage modulus (E'), loss modulus (E") and loss tangent (tanδ) of the composites as a function of frequency (ω) from 0.1 to 20 Hz at 23℃.

Results

The E' and E" increased with increasing frequency and showed differences in magnitude between brands. The E*s of composites at ω = 2 Hz, normalized to that of Z100, were 2.16 (Z250), 4.80 (P60) and 25.21 (SureFil). The magnitudes and patterns of the change of tanδ of composites with increasing frequency were significantly different between brands. The relationships between the complex modulus E*, the phase angle δ and the frequency ω were represented by frequency domain phasor form, E* (ω) = E*e = E*∠δ.

Conclusions

The viscoelasticity of composites that influences handling characteristics is significant different between brands. The VOR is a relatively simple device for dynamic, mechanical analysis of high viscous dental composites. The locus of frequency domain phasor plots in a complex plane is a valuable method of representing the viscoelastic properties of composites.

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  • Effect of instrument compliance on the polymerization shrinkage stress measurements of dental resin composites
    Deog-Gyu Seo, Sun-Hong Min, In-Bog Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 145.     CrossRef
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Dentin bond strength of bonding agents cured with Light Emitting Diode
Sun-Young Kim, In-Bog Lee, Byeong-Hoon Cho, Ho-Hyun Son, Mi-Ja Kim, Chang-In Seok, Chung-Moon Um
J Korean Acad Conserv Dent 2004;29(6):504-514.   Published online January 14, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.6.504
AbstractAbstract PDFPubReaderePub
ABSTRACT

This study compared the dentin shear bond strengths of currently used dentin bonding agents that were irradiated with an LED (Elipar FreeLight, 3M-ESPE) and a halogen light (VIP, BISCO). The optical characteristics of two light curing units were evaluated. Extracted human third molars were prepared to expose the occlusal dentin and the bonding procedures were performed under the irradiation with each light curing unit. The dentin bonding agents used in this study were Scotchbond Multipurpose (3M ESPE), Single Bond (3M ESPE), One-Step (Bisco), Clearfil SE bond (Kuraray), and Adper Prompt (3M ESPE). The shear test was performed by employing the design of a chisel-on-iris supported with a Teflon wall. The fractured dentin surface was observed with SEM to determine the failure mode.

The spectral appearance of the LED light curing unit was different from that of the halogen light curing unit in terms of maximum peak and distribution. The LED LCU (maximum peak in 465 ㎚) shows a narrower spectral distribution than the halogen LCU (maximum peak in 487 ㎚). With the exception of the Clearfil SE bond (P < 0.05), each 4 dentin bonding agents showed no significant difference between the halogen light-cured group and the LED light-cured group in the mean shear bond strength (P > 0.05).

The results can be explained by the strong correlation between the absorption spectrum of cam-phoroquinone and the narrow emission spectrum of LED.

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MMP-1 and TIMP-1 production in MG-63 cells stimulated with Prevotella nigrescens lipopolysaccharide
Won-Kyung Yang, Mi-Ri Kim, Won-Jun Shon, In-Bog Lee, Byeong-Hoon Cho, Chung-Moon Um, Ho-Hyun Son
J Korean Acad Conserv Dent 2004;29(5):470-478.   Published online September 30, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.5.470
AbstractAbstract PDFPubReaderePub

The purpose of this study is to monitor the secretion of matrix metalloproteinase-1 (MMP-1) and tissue inhibitor of metalloproteinase-1 (TIMP-1) produced by human osteosarcoma cell line (MG63) stimulated with Prevotella nigrescens lipopolysaccharides (LPS), and to compare the level of secretion before and after the treatment of calcium hydroxide on P. nigrescens LPS.

LPS was extracted and purified from anaerobically cultured P. nigrescens. MG63 cells were stimulated by the LPS (0, 1, 10 µg/ml) or LPS (10 µg/ml) pretreated with 12.5 mg/ml of Ca(OH)2 for 3 days.

Total RNA was isolated from the cell, and real-time quantitative polymerase chain reaction (PCR) was performed for quantification of MMP-1 and TIMP-1.

The results were as follows.

1. MMP-1 mRNA expression at 48 hr was highly increased by stimulation with P. nigrescens LPS. The increase was dose-dependent.

2. When stimulated with 1 µg/ml of LPS, TIMP-1 mRNA expression was highly increased at 24 hr and 48 hr. However, TIMP-1 expression was suppressed at higher concentration (10 µg/ml).

3. When P. nigrescens LPS was pretreated with Ca(OH)2, MMP-1 and TIMP-1 gene expression was downregulated.

The results of this study suggest that transcriptional regulation of MMP-1 and TIMP-1 by P. nigrescens LPS could be one of the important mechanisms in bone resorption of periapical inflammation. The result of calcium hydroxide on MMP-1 and TIMP-1 gene expression suppression shows that calcium hydroxide detoxified bacterial LPS and thus should be used the medication of choice for intracanal dressings in root canal infected with black-pigmented bacteria.

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Expression and functional characterization of odontoblast-derived gene: OD314
Doo-Hyun Kim, Heung-Joong Kim, Moon-Jin Jeong, Ho-Hyun Son, Joo-Cheol Park
J Korean Acad Conserv Dent 2004;29(4):399-408.   Published online July 31, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.4.399
AbstractAbstract PDFPubReaderePub

Odontoblasts are responsible for the formation and maintenance of dentin. They are known to synthesize unique gene products including dentin sialophosphoprotein (DSPP). Another unique genes of the cells remain unclear.

OD314 was isolated from the odontoblasts/pulp cells of rats and partially characterized as an odontoblast-enriched gene (Dey et al., 2001). This study aimed to elucidate the biological function of OD314, relating to odontoblast differentiation and dentinogenesis. After determining the open reading frame (ORF) of OD314 by transient transfection analysis using green fluorescent protein (GFP) expression vector, mRNA in-situ hybridization, immunohistochemistry, reverse transcription-polymerase chain reaction (RT-PCR) and western analysis were performed.

The results were as follows:

1. In in-situ hybridization, OD314 mRNAs were expressed in odontoblasts of developing coronal and root pulp.

2. OD314 was a novel protein encoding 154 amino acids, and the protein was mainly expressed in cytoplasm by transient transfection analysis.

3. Mineralized nodules were associated with multilayer cell nodules in the culture of human dental pulp cells and first detected from day 21 using alizarin-red S staining.

4. In RT-PCR analysis, OD314, osteocalcin (OC) and DSPP strongly expressed throughout 28 days of culture. Whereas, osteonectin (ON) mRNA expression stayed low up to day 14, and then gradually decreased from day 21.

5. Western blots showed an approximately 17 kDa band. OD314 protein was expressed from the start of culture and then increased greatly from day 21.

In conclusion, OD314 is considered as an odontoblast-enriched gene and may play important roles in odontoblast differentiation and dentin mineralization.

Citations

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  • The effects of sodium fluoride on oral normal cell cultured in vitro
    Byul-Bora Choi, Da-Hye Kim, Ji-Young Kim, Sang-Rye Park
    Journal of Korean society of Dental Hygiene.2016; 16(3): 471.     CrossRef
  • A study of APin-protein interactions using protein microarray
    Joo-Cheol Park, Sun-Hwa Park, Heung-Joong Kim, Jong-Tae Park, Seong-Ho Youn, Ji-Woong Kim, Tae-Yeon Lee, Ho-Hyun Son
    Journal of Korean Academy of Conservative Dentistry.2007; 32(5): 459.     CrossRef
  • Expression and function of OD314, Apin protein during ameloblast differentiation and amelogenesis
    Jong-Tae Park, Yong-Seok Choi, Heung-Joong Kim, Moon-Jin Jeong, Hyun-Ju Oh, In-Cheol Shin, Joo-Cheol Park, Ho-Hyun Son
    Journal of Korean Academy of Conservative Dentistry.2006; 31(6): 437.     CrossRef
  • Expression of OD314 during ameloblast differentiation and maturation
    Joo-Cheol Park, Seong-Min Ahn, Heung-Joong Kim, Moon-Jin Jeong, Min-Ju Park, In-Cheol Shin, Ho-Hyun Son
    Journal of Korean Academy of Conservative Dentistry.2005; 30(5): 423.     CrossRef
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The effect of cavity wall property on the shear bond strength test using iris method
Dong-Hwan Kim, Ji-Hyun Bae, Byeong-Hoon Cho, In-Bog Lee, Seung-Ho Baek, Hyun-Mi Ryu, Ho-Hyun Son, Chung-Moon Um, Hyuck-Choon Kwon
J Korean Acad Conserv Dent 2004;29(2):170-176.   Published online March 31, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.2.170
AbstractAbstract PDFPubReaderePub
Objectives

In the unique metal iris method, the developing interfacial gap at the cavity floor resulting from the cavity wall property during polymerizing composite resin might affect the nominal shear bond strength values. The aim of this study is to evaluate that the iris method reduces the cohesive failure in the substrates and the cavity wall property effects on the shear bond strength tests using iris method.

Materials and Methods

The occlusal dentin of 64 extracted human molars were randomly divided into 4 groups to simulate two different levels of cavity wall property (metal and dentin iris) and two different materials (ONE-STEP® and ALL-BOND® 2) for each wall property. After positioning the iris on the dentin surface, composite resin was packed and light-cured. After 24 hours the shear bond strength was measured at a crosshead speed of 0.5 mm/min. Fracture analysis was performed using a microscope and SEM. The data was analyzed statistically by a two-way ANOVA and t-test.

Results

The shear bond strength with metal iris was significant higher than those with dentin iris (p = 0.034). Using ONE-STEP®, the shear bond strength with metal iris was significant higher than those with dentin iris (p = 0.005), but not in ALL-BOND® 2 (p = 0.774). The incidence of cohesive failure was very lower than other shear bond strength tests that did not use iris method.

Conclusions

The iris method may significantly reduce the cohesive failures in the substrates. According to the bonding agent systems, the shear bond strength was affected by the cavity wall property.

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  • Effect of infection control barrier thickness on light curing units
    Hoon-Sang Chang, Seok-Ryun Lee, Sung-Ok Hong, Hyun-Wook Ryu, Chang-Kyu Song, Kyung-San Min
    Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 368.     CrossRef
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Influence of the curing time for the adhesive on the oxygen-inhibited layer thickness and the shear bond strength to dentin
Yong-Hoon Choi, Ji-Hyun Bae, Ho-Hyun Son, In-Bog Lee, Chung-Moon Um, Seung-Ho Baek, Oh-Young Kim, Chang-Keun Kim, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2004;29(2):177-184.   Published online January 14, 2004
DOI: https://doi.org/10.5395/JKACD.2004.29.2.177
AbstractAbstract PDFPubReaderePub
ABSTRACT Objectives:

This study investigated the hypothesis that increasing light-curing time would leave the oxygen-inhibited layer (OIL) of the adhesive thinner, and in turn, result in lower shear bond strength (SBS) than those obtained by the routine curing procedures.

Methods:

120 human extracted posterior teeth were randomly divided into three groups for bonding with three adhesives: All Bond 2®, One Step®, and Adper Prompt®. They were subsequently divided into four subgourps with different light-curing time (10, 20, 30 and 60 s). The assigned adhesives were applied on superficial occlusal dentin according to the manufacturer’s instructions and cured with one of the four curing times. Composite resin cylinder, 2.35 mm in diameter, were built on the cured adhesive and light-cured for 40 s. SBS were measured after 24 h from the bonding using a universal testing machine (crosshead speed 1.0 mm/min). The relative thickness of the OIL and the degree of conversion (DC) were determined from the adhesive on a slide glass using FT-NIR in an absorbance mode. Data were analysed with One-way ANOVA and Duncan’s multiple test (p < 0.05).

Results:

With increasing cure time, although there were no significant difference in th SBS of One-step and Adper Prompt (p > 0.05), those of All Bond 2 decreased significantly (p < 0.05). The relative thicknesses of the OIL on each adhesive were not affected by the cure time (p > 0.05). Although the DC of All-Bond 2 were statistically not different with increasing cure time (p > 0.05), those of One-Step and Adper Prompt showed an increasing trends with increasing cure time (p < 0.05).

Conclusions:

Increasing light-curing time did not affect on the relative thickness of the OIL of the adhesives, and in turn, on the SBS to dentin.

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The effect of viscosity, specimen geometry and adhesion on the linear polymerization shrinkage measurement of light cured composites
In-Bog Lee, Ho-Hyun Son, Hyuk-Chun Kwon, Chung-Moon Um, Byeong-Hoon Cho
J Korean Acad Conserv Dent 2003;28(6):457-466.   Published online November 30, 2003
DOI: https://doi.org/10.5395/JKACD.2003.28.6.457
AbstractAbstract PDFPubReaderePub
Objectives

The aim of study was to investigate the effect of flow, specimen geometry and adhesion on the measurement of linear polymerization shrinkage of light cured composite resins using linear shrinkage measuring device.

Methods

Four commercially available composites - an anterior posterior hybrid composite Z100, a posterior packable composite P60 and two flowable composites, Filtek flow and Tetric flow - were studied. The linear polymerization shrinkage of composites was determined using 'bonded disc method' and 'non-bonded' free shrinkage method at varying C-factor in the range of 1~8 by changing specimen geometry. These measured linear shrinkage values were compared with free volumetric shrinkage values.

The viscosity and flow of composites were determined and compared by measuring the dropping speed of metal rod under constant load.

Results

In non-bonded method, the linear shrinkage approximated one third of true volumetric shrinkage by isotropic contraction. However, in bonded disc method, as the bonded surface increased the linear shrinkage increased up to volumetric shrinkage value by anisotropic contraction. The linear shrinkage value increased with increasing C-factor and approximated true volumetric shrinkage and reached plateau at about C-factor 5~6. The more flow the composite was, reduced linear shrinkage was measured by compensation radial flow.

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  • Influence of cavity size and restoration methods on the cusp deflection in composite restoration
    Mi-Ra Lee, In-Bog Lee, Chang-In Seok, Sang-Tag Lee, Chung-Moon Um
    Journal of Korean Academy of Conservative Dentistry.2004; 29(6): 532.     CrossRef
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Evaluation of Sodium Dichloroisocyanurate as a root canal irrigation solution; Cl- concentration, pH, Cytotoxicity and Antimicrobial effect in vitro
Woo-Cheol Lee, Bong-Sun Kang, Cheol-Ho Kim, Ho-Hyun Son
J Korean Acad Conserv Dent 2003;28(5):425-430.   Published online September 30, 2003
DOI: https://doi.org/10.5395/JKACD.2003.28.5.425
AbstractAbstract PDFPubReaderePub

The purpose of this study was to evaluate the clinical applications of the Sodium Dichloroisocyanurate effervescent tablet as a routine root canal irrigant by performing several in vitro tests such as Cl- content, cytotoxicity, antimicrobial effect as well as its pH level compared to the equivalent concentration of sodium hypochlorite solution.

Sodium Dichloroisocyanurate demonstrated lower level of Cl- concentation than each dilution of sodium hypochlorite solution. Both solution has increased level of Cl- as the concentration of each solution increased. There was no significant change of Cl- concentration in sodium hypochlorite as time goes by. However, Cl- concentration in Sodium Dichloroisocyanurate was increased.

The antimicrobial effects of both solutions were increased when their concentrations were increased. One day after dilution, antimicrobial effect of Sodium Dichloroisocyanurate was slightly higher than sodium hypochlorite, however, there was no difference in 1 week dilution solution. One month dilution solution of sodium hypochlorite still retain its activity, but antimicrobial effect of Sodium Dichloroisocyanurate was drastically decreased 1 month after dilution.

The cytotoxicity of Sodium Dichloroisocyanurate was rather higher than same concentration of sodium hypochlorite solution until 1 week after dilution. Then in 1 month, cytotoxicity of Sodium Dichloroisocyanurate was decreased than that of 1 week dilution solution, especially 4% Sodium Dichloroisocyanurate solution has almost no toxicity. However, 1% and 2% sodium hypochlorite solution has unchanged moderate degree of cytotoxicity after the dilution. Furthermore, 4% sodium hypochlorite solution showed high level of toxicity.

The pH level of Sodium Dichloroisocyanurate showed that the solution was weak acid (pH5). On the other hand, sodium hypochlorite was revealed as a strong alkaline solution (pH12). There was no change in pH following the dilution of each solution.

As results, Sodium Dichloroisocyanurate solution fully satisfy the basic requirements as a root canal irrigation solution. However, we strongly recommend to use this solution clinically in low concentration and try to apply into the root canal within 1 week after dilution.

Citations

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  • Evaluation of time-dependent antimicrobial effect of sodium dichloroisocyanurate (NaDCC) onEnterococcus faecalisin the root canal
    Hye-Jeong Kim, Se-Hee Park, Kyung-Mo Cho, Jin-Woo Kim
    Journal of Korean Academy of Conservative Dentistry.2007; 32(2): 121.     CrossRef
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The nanoleakage patterns of different dentin adhesive systems
Tae-Yeon Lee, Byeong-Hoon Cho, Ho-Hyun Son
J Korean Acad Conserv Dent 2003;28(2):169-177.   Published online March 31, 2003
DOI: https://doi.org/10.5395/JKACD.2003.28.2.169
PDFPubReaderePub

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  • Quantitative comparison of permeability in the adhesive interface of four adhesive systems
    Juhea Chang, Keewook Yi, Hae-Young Kim, In Bog Lee, Byeong Hoon Cho, Ho-Hyun Son
    Journal of Korean Academy of Conservative Dentistry.2009; 34(1): 51.     CrossRef
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Effect of light intensity on the polymerization rate of composite resin using real-time measurement of volumetric change
Sung-Ho La, In-Bog Lee, Chang-Keun Kim, Byeong-Hoon Cho, Kwang-Won Lee, Ho-Hyun Son
J Korean Acad Conserv Dent 2002;27(2):135-141.   Published online March 31, 2002
DOI: https://doi.org/10.5395/JKACD.2002.27.2.135
AbstractAbstract PDFPubReaderePub
Objectives

The aim of this study is to evaluate the effect of light intensity variation on the polymerization rate of composite resin using IB system (the experimental equipment designed by Dr. IB Lee) by which real-time volumetric change of composite can be measured.

Methods

Three commercial composite resins [Z100(Z1), AeliteFil(AF), SureFil(SF)] were photopolymerized with Variable Intensity Polymerizer unit (Bisco, U.S.A.) under the variable light intensity (75/150/225/300/375/450mW2) during 20 sec. Polymerization shrinkage of samples was detected continuously by IB system during 110 sec and the rate of polymerization shrinkage was obtained by its shrinkage data. Peak time(P.T.) showing the maximum rate of polymerization shrinkage was used to compare the polymerization rate.

Results

Peak time decreased with increasing light intensity(p<0.05). Maximum rate of polymerization shrinkage increased with increasing light intensity(p<0.05). Statistical analysis revealed a significant positive correlation between peak time and inverse square root of the light intensity (AF:R=0.965, Z1:R=0.974, SF:R=0.927). Statistical analysis revealed a significant negative correlation between the maximum rate of polymerization shrinkage and peak time(AF:R=-0.933, Z1:R=-0.892, SF:R=-0.883), and a significant positive correlation between the maximum rate of polymerization shrinkage and square root of the light intensity (AF:R=0.988, Z1:R=0.974, SF:R=0.946).

Discussion and Conclusions

The polymerization rate of composite resins used in this study was proportional to the square root of light intensity. Maximum rate of polymerization shrinkage as well as peak time can be used to compare the polymerization rate. Real-time volume method using IB system can be a simple, alternative method to obtain the polymerization rate of composite resins.

Citations

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  • Effect of instrument compliance on the polymerization shrinkage stress measurements of dental resin composites
    Deog-Gyu Seo, Sun-Hong Min, In-Bog Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 145.     CrossRef
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Microleakage of microfill and flowable composite resins in class V cavity after load cycling
Suk-Ho Kang, Oh-young Kim, Myung-Hwan Oh, Byeong-Hoon Cho, Chung-Moon Um, Hyuk-Choon Kwon, Ho-Hyun Son
J Korean Acad Conserv Dent 2002;27(2):142-149.   Published online March 31, 2002
DOI: https://doi.org/10.5395/JKACD.2002.27.2.142
AbstractAbstract PDFPubReaderePub

Low-viscosity composite resins may produce better sealed margins than stiffer compositions (Kemp-Scholte and Davidson, 1988; Crim, 1989). Flowable composites have been recommended for use in Class V cavities but it is also controversial because of its high rates of shrinkage. On the other hand, in the study comparing elastic moduli and leakage, the microfill had the least leakage (Rundle et al. 1997). Furthermore, in the 1996 survey of the Reality Editorial Team, microfills were the clear choice for abfraction lesions.

The purpose of this study was to evaluate the microleakage of 6 compostite resins (2 hybrids, 2 microfills, and 2 flowable composites) with and without load cycling.

Notch-shaped Class V cavities were prepared on buccal surface of 180 extracted human upper premolars on cementum margin. The teeth were randomly divided into non-load cycling group (group 1) and load cycling group (group 2) of 90 teeth each. The experimental teeth of each group were randomly divided into 6 subgroups of 15 samples. All preparations were etched, and Single bond was applied. Preparations were restored with the following materials (n=15): hybrid composite resin [Z250(3M Dental Products Inc. St.Paul, USA), Denfil(Vericom, Ahnyang, Korea)], microfill [Heliomolar RO(Vivadent, Schaan, Liechtenstein), Micronew(Bisco Inc. Schaumburg, IL, USA)], and flowable composite [AeliteFlo(Bisco Inc. Schaumburg, IL, USA), Revolution(Kerr Corp. Orange, CA, USA)]. Teeth of group 2 were subjected to occlusal load (100N for 50,000 cycles) using chewing simulator(MTS 858 Mini Bionix II system, MTS Systems Corp., Minn. USA). All samples were coated with nail polish 1mm short of the restoration, placed in 2% methylene blue for 24 hours, and sectioned with a diamond wheel. Enamel and dentin/cementum margins were analyzed for microleakage on a sclale of 0 (no leakage) to 3 (3/3 of wall). Results were statistically analyzed by Kruscal-Wallis One way analysis, Mann-Whitney U-test, and Student-Newmann-Keuls method. (p=0.05)

Results

1. There was significantly less microleage in enamel margins than dentinal margins of all groups. (p<0.05)

2. There was no significant difference between six composite resin in enamel margin of group 1.

3. In dentin margin of group 1, flowable composite had more microleakage than others but not of significant differences.

4. There was no significant difference between six composite resin in enamel margin of group 2.

5. In dentin margin of group 2, the microleakage were R>A=H=M>D>Z. But there was no significant differences.

6. In enamel margins, load cycling did not affect the marginal microleakage in significant degree.

7. In dentin margins, load cycling did affect the marginal microleakage only in Revolution. (p<0.05)

Citations

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  • Effect of a new resin monomer on the microleakage of composite resin restorations
    JH Bae, YK Kim, PY Yoon, MA Lee, BH Cho
    Journal of Korean Academy of Conservative Dentistry.2007; 32(5): 469.     CrossRef
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Effects of filler addition to bonding agents on shear bond strength
Young Oh, Myung-Hwan Oh, Byeong-Hoon Cho, Ho-Hyun Son, Hyuk-Choon Kwon, Chung-Moon Um
J Korean Acad Conserv Dent 2002;27(1):44-53.   Published online January 31, 2002
DOI: https://doi.org/10.5395/JKACD.2002.27.1.044
PDFPubReaderePub

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  • Hybrid Layer, Shear Bond Strength, and Fracture Patterns of Titanium Dioxide–Doped Phosphate Glass–Filled Universal Dental Adhesives
    Adam bin Husein, Sana Mhd. Fouad Seoudi, Hatem Mostafa El-Damanhoury, Ibrahim Mahmood Aziz, Ensanya Ali Abou Neel
    European Journal of General Dentistry.2025; 14(01): 044.     CrossRef
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