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Evaluation of the rat tissue reaction to experimental new resin cement and mineral trioxide aggregate cement
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Won-Kyung Yang, Hyun-Jung Ko, Mi-Ri Kim
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Restor Dent Endod 2012;37(4):194-200. Published online November 21, 2012
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DOI: https://doi.org/10.5395/rde.2012.37.4.194
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Abstract
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- Objectives
New resin cement (NRC) has been developed as a root repairing material and the material is composed of organic resin matrix and inorganic powders. The aim of this study was to compare the rat subcutaneous tissue response to NRC and mineral trioxide aggregate (MTA) cement and to investigate the tissue toxicity of both materials. Materials and MethodsSixty rats received two polyethylene tube-implants in dorsal subcutaneous regions, MTA and NRC specimens. Twenty rats were sacrificed respectively at 1, 4 and 8 wk after implantation and sectioned to 5 µm thickness and stained with Hematoxylin-Eosin (H-E) or von-Kossa staining. The condition of tissue adjacent to the implanted materials and the extent of inflammation to each implant were evaluated by two examiners who were unaware of the type of implanted materials in the tissues. Data were statistically analyzed with paired t-test (p < 0.05). ResultsIn specimens implanted with both NRC and MTA, severe inflammatory reactions were present at one wk, which decreased with time. At eighth wk, MTA implanted tissue showed mild inflammatory reaction, while there were moderate inflammatory reactions in NRC implanted tissue, respectively. In NRC group, von-Kossa staining showed more calcification materials than MTA group at eighth wk. ConclusionsIt was concluded that the calcium reservoir capability of NRC may contribute to mineralization of the tissues.
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Ranjdar Mahmood Talabani, Balkees Taha Garib, Reza Masaeli, Kavosh Zandsalimi, Farinaz Ketabat Restorative Dentistry & Endodontics.2021;[Epub] CrossRef - Genotoxicity of root canal sealers: a literature review
Fábio Miguel dos Santos Costa, Maria Helena Fernandes, Silvia Regina Batistuzzo de Medeiros Clinical Oral Investigations.2020; 24(10): 3347. CrossRef - Marginal adaptation, solubility and biocompatibility of TheraCal LC compared with MTA-angelus and biodentine as a furcation perforation repair material
M. A. Alazrag, A. M. Abu-Seida, K. M. El-Batouty, S. H. El Ashry BMC Oral Health.2020;[Epub] CrossRef - Evaluation in vivo of biocompatibility of differents resin-modified cements for bonding orthodontic bands
JANAINA A. MESQUITA, ROGÉRIO LACERDA-SANTOS, GÊISA A.M. SAMPAIO, GUSTAVO P. GODOY, CASSIANO F.W. NONAKA, POLLIANNA M. ALVES Anais da Academia Brasileira de Ciências.2017; 89(3 suppl): 2433. CrossRef - A preliminary report on histological outcome of pulpotomy with endodontic biomaterials vs calcium hydroxide
Ali Nosrat, Ali Peimani, Saeed Asgary Restorative Dentistry & Endodontics.2013; 38(4): 227. CrossRef - Biocompatibility of root-end filling materials: recent update
Payal Saxena, Saurabh Kumar Gupta, Vilas Newaskar Restorative Dentistry & Endodontics.2013; 38(3): 119. CrossRef
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Accuracy of Root ZX in teeth with simulated root perforation in the presence of gel or liquid type endodontic irrigant
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Hyeong-Soon Shin, Won-Kyung Yang, Mi-Ri Kim, Hyun-Jung Ko, Kyung-Mo Cho, Se-Hee Park, Jin-Woo Kim
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Restor Dent Endod 2012;37(3):149-154. Published online August 29, 2012
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DOI: https://doi.org/10.5395/rde.2012.37.3.149
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Abstract
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- Objectives
To evaluate the accuracy of the Root ZX in teeth with simulated root perforation in the presence of gel or liquid type endodontic irrigants, such as saline, 5.25% sodium hypochlorite (NaOCl), 2% chlorhexidine liquid, 2% chlorhexidine gel, and RC-Prep, and also to determine the electrical conductivities of these endodontic irrigants. Materials and MethodsA root perforation was simulated on twenty freshly extracted teeth by means of a small perforation made on the proximal surface of the root at 4 mm from the anatomic apex. Root ZX was used to locate root perforation and measure the electronic working lengths. The results obtained were compared with the actual working length (AWL) and the actual location of perforations (AP), allowing tolerances of 0.5 or 1.0 mm. Measurements within these limits were considered as acceptable. Chi-square test or the Fisher's exact test was used to evaluate significance. Electrical conductivities of each irrigant were also measured with an electrical conductivity tester. ResultsThe accuracies of the Root ZX in perforated teeth were significantly different between liquid types (saline, NaOCl) and gel types (chlorhexidine gel, RC-Prep). The accuracies of electronic working lengths in perforated teeth were higher in gel types than in liquid types. The accuracy in locating root perforation was higher in liquid types than gel types. 5.25% NaOCl had the highest electrical conductivity, whereas 2% chlorhexidine gel and RC-Prep gel had the lowest electrical conductivities among the five irrigants. ConclusionsDifferent canal irrigants with different electrical conductivities may affect the accuracy of the Root ZX in perforated teeth.
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Eman M. Yahya, Ashraf S. Alchalabi, Emad Farhan Alkhalidi Journal of International Society of Preventive and Community Dentistry.2024; 14(3): 211. CrossRef - The precision of radiographic and electronic working length estimation methods in endodontics: A systematic review of clinical studies
Anithakumari Rangappa, Buvaneshwari Arul, Jayalakshmi Somasundaram, Velmurugan Natanasabapathy Endodontology.2024;[Epub] CrossRef - Comparative evaluation of the accuracy of electronic apex locators and cone-beam computed tomography in detection of root canal perforation and working length during endodontic retreatment
Simay Koç, Hatice Harorlı, Alper Kuştarcı BMC Oral Health.2024;[Epub] CrossRef - Comparative Accuracy and Reliability of Three Electronic Apex Locators in Determining the Apical Constriction of Molar Canals: A Micro-CT Evaluation
Reem M. Barakat, Rahaf A. Almohareb, Arwa O. Alharbi, Asma Alhazmi, Reem Alomar Journal of Clinical Medicine.2024; 13(17): 5199. CrossRef - Accuracy of the integrated electronic apex locator in locating simulated perforation under various irrigating solutions in an in vitro study
Chintan Joshi, Surabhi Joshi, Urooj Desai, Sweety Thumar, Aashray Patel, Ankita Khunt Brazilian Journal of Oral Sciences.2024; 23: e241118. CrossRef - The Accuracy of Different Apex Locator Systems in Detecting Root Perforations in the Presence of Different Irrigation Solutions
Oğuz Burhan Çetinkaya, Emre Çulha, Uğur Aydın European Journal of Therapeutics.2023; 30(1): 39. CrossRef - In Vitro Comparison of the Accuracy of Cone-Beam Computed Tomography Scanning and Electronic Apex Locators in Detection of Simulated Root Perforations in Different Localizations
Hatice Harorlı, Simay Koç, Alper Kuştarcı Journal of Endodontics.2023; 49(12): 1676. CrossRef - Accuracy of different electronic apex locators in determination of minimum Root perforation diameter
Simay Koç, Alper Kuştarcı, Kürşat Er Australian Endodontic Journal.2023; 49(S1): 179. CrossRef - The influence of MTAD and QMix on the accuracy of electronic apex locator in locating simulated perforations
A Dumani, AA Ates, CS Ucan, S Yilmaz, I Unal, O Yoldas Nigerian Journal of Clinical Practice.2022; 25(3): 281. CrossRef - Synthesis and evaluation of grafted xanthan gum as a drug carrier in developing lornoxicam gel formulations
SandipAshok Murtale, PrakashS Goudanavar, NRaghavendra Naveen, WalaaF Alsanie, Majid Alhomrani, AbdulhakeemS Alamri, SyedMohammed Basheeruddin Asdaq, MdKhalid Anwer, Nagaraja Sreeharsha, MazenAl Gharsan, Santosh Fattepur Pharmacognosy Magazine.2022;[Epub] CrossRef - KOMBİNE İRRİGASYON SOLÜSYONLARININ ELEKTRİKSEL İLETKENLİĞİNİN KARŞILAŞTIRILMASI
Ayşin DUMANİ, Şehnaz YILMAZ, Oğuz YOLDAŞ, Güray KILINÇÇEKER Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2022; : 1. CrossRef - Accuracy of electronic apex locator in the presence of different irrigating solutions
Padmanabh Jha, Vineeta Nikhil, Shalya Raj, Rohit Ravinder, Preeti Mishra Endodontology.2021; 33(4): 232. CrossRef - Comparative Evaluation of Accuracy of Different Apex Locators: Propex IQ, Raypex 6, Root ZX, and Apex ID with CBCT and Periapical Radiograph—In Vitro Study
Okba Mahmoud, Mawada Hassan Awad Abdelmagied, Ahmad Hisham Dandashi, Bakr Nssaief Jasim, Hussam Alddin Tawfik Kayali, Saaid Al Shehadat, Luca Testarelli International Journal of Dentistry.2021; 2021: 1. CrossRef - Evaluation of Temperature Increase From Joule Heat in Numerical Tooth Model by Applying 500 kHz Current for Apical Periodontitis Treatment—Effect of Applied Voltage and Tooth Conductivity
Hiroo Tarao, Masatake Akutagawa, Takahiro Emoto, Amane Takei, Hiromichi Yumoto, Toshihiko Tominaga, Toshitaka Ikehara, Yosuke Kinouchi Bioelectromagnetics.2021; 42(3): 224. CrossRef - Confort visual en oficinas, factor temporal en la evaluación de deslumbramiento
J. Yamin, A. Pattini, E. Colombo Informes de la Construcción.2020; 72(557): e329. CrossRef - The influence of two forms of chlorhexidine on the accuracy of contemporary electronic apex locators
Ewa Marek, Ryta Łagocka, Katarzyna Kot, Krzysztof Woźniak, Mariusz Lipski BMC Oral Health.2020;[Epub] CrossRef - Efficiency of an integrated apex locator in determining working length in various irrigating solutions: An in vivo study
RakeshReddy Chukka, MalatiDevi Bellam, NarenderReddy Marukala, Sainath Dinapadu, NareshKumar Konda, Jithender Nagilla Journal of Pharmacy And Bioallied Sciences.2020; 12(5): 410. CrossRef - Accuracy of two electronic apex locators in locating root perforations in curved canals in dry and wet conditions: A comparative in vitro study
MonishaParshotam Khatri, SheetalB Ghivari, Madhu Pujar, Reshma Faras, Pallavi Gopeshetti, Amulya Vanti Dental Research Journal.2019; 16(6): 407. CrossRef - Consistency of electronic measurements of endodontic working length when using multiple devices from the same manufacturer—an in vitro study
Franziska Haupt, M Hülsmann Clinical Oral Investigations.2018; 22(9): 3107. CrossRef - The Influence of Various Irrigants on the Accuracy of 2 Electronic Apex Locators in Locating Simulated Root Perforations
Demet Altunbaş, Alper Kuştarcı, Mustafa Toyoğlu Journal of Endodontics.2017; 43(3): 439. CrossRef - Accuracy and Repeatability of 3 Apex Locators in Locating Root Canal Perforations: An Ex Vivo Study
Fábio Luiz Cunha D'Assunção, Julio Cézar Nascimento Sousa, Kayo César Amaro Felinto, Thiago Clístines de Medeiros, Diego Tavares Leite, Raissa Bezerra de Lucena, Joab de Oliveira Lima Journal of Endodontics.2014; 40(8): 1241. CrossRef
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Apical microleakage of MTA with 4-META/MMA & TBB resin as a root-end filling material
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Jin-Cheol Kim, Mi-Ri Kim, Hyun-Jung Ko, Won-Kyung Yang
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J Korean Acad Conserv Dent 2009;34(4):371-376. Published online July 31, 2009
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DOI: https://doi.org/10.5395/JKACD.2009.34.4.371
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Abstract
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We evaluated in vitro microleakage of Mineral Trioxide Aggregate (MTA) powder with 4-methacryloxyethyl trimellitate anhydride (4-META) / methyl methacrylate (MMA) & tri-n-butylborane (TBB) resin as a retrograde filling material by using methylene blue dye method.
Fifty-two single rooted, extracted teeth were instrumented and obturated with gutta percha and AH plus sealer. The apical 3mm of each root was resected and 3mm deep ultrasonic root end preparation was done. External surface of roots was coated with nail varnish. Prepared teeth were randomly divided into five groups; Negative control: completely covered with nail varnish; Positive control: coated with nail varnish except for apical foramen; Group 1 (retrofilled with Portland cement); Group 2 (retrofilled with MTA); Group 3 (retrofilled with MTA powder mixed with 4-META/MMA & TBB resin). Immediately after completion of root-end filling, all specimens were submerged in methylene blue dye for 72 hours in 37℃ incubator. The roots were longitudinally sectioned and measured for extent of dye penetration by three different examiners under microscope (×10). The results were statistically analyzed using one way ANOVA and Turkey's HSD test. No leakage was evident in negative control and complete leakage in positive control group. Group 3 showed significantly less leakage than group 1 and 2 (p < 0.01). There was no significant difference between group 1 and 2 (p > 0.01).
It was concluded that MTA powder with 4-META/MMA & TBB resin was excellent in reducing initial apical microleakage.
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- Characteristics of novel root-end filling material using epoxy resin and Portland cement
Sang-Jin Lee, Jin Chung, Hee-Sam Na, Eun-Joo Park, Hyo-Jin Jeon, Hyeon-Cheol Kim Clinical Oral Investigations.2013; 17(3): 1009. CrossRef - Sealing Ability of Three Different Materials Used as Retrograde Filling
Ji-Hoon Park, Seung-Bok Kang, Yong-Hoon Choi, Ji-Hyun Bae Journal of Korean Dental Science.2012; 5(2): 60. CrossRef - Physical properties of novel composite using Portland cement for retro-filling material
Sang-Jin Lee, Ok-In Cho, Jiwan Yum, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim Journal of Korean Academy of Conservative Dentistry.2010; 35(6): 445. CrossRef
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MMP and TIMP production in periodontal ligament fibroblasts stimulated by Prevotella nigrescens lipopolysaccharide
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Won-Kyung Yang, WooCheol Lee, Mi-Ri Kim, Ho-Hyun Son
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J Korean Acad Conserv Dent 2005;30(5):372-384. Published online September 30, 2005
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DOI: https://doi.org/10.5395/JKACD.2005.30.5.372
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Abstract
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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.
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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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The Effect of Estrogen Deficiency on Rat Pulpodentinal Complex
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Miri Kim, Won-Kyung Yang, Jin Baek, Jong-Jin Kim, Won-Kyung Kim, Young-Kyoo Lee
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J Korean Acad Conserv Dent 2005;30(5):402-408. Published online January 14, 2005
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DOI: https://doi.org/10.5395/JKACD.2005.30.5.402
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Abstract
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- Abstract
The purpose of this study was to investigate the effects of estrogen deficiency on pulpodentinal complex of tooth in ovariectomized rats. Thirty female Sprague-Dawley rats, 10 weeks old, were used. Rats were grouped into two groups. One group (n = 15) was subjected to sham surgery (SHAM) and the other group (n = 15) was ovariectomized bilaterally (OVX). Animals were sacrificed 12 weeks later, and their mandibular molars and associated periodontal supporting tissues were dissected out, and fixed in 10% buffered formalin. For comparison of groups, immunostained for osteonectin. Histomorphometrical measurement of change of teeth was performed using an image analysis system and paired t-test was used and the level of significance for overall differences was set at p < 0.05.
In immunostaining of osteonectin, they were significantly different from each other. The predentin thickness in OVX rats was wider than in SHAM rats. And in SHAM rats, osteonectin was more specifically stained in predentin areas than in OVX rats. These results indicate that estrogen deficiency increased the unmineralized predentin areas and decreased osteonectin content in pulpal tissues in rats. If our result is applicable to human studies, odotoblast is affected by estrogen deficiency.
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- Characterization of craniofacial tissue aging in genetically diverse HET3 male mice with longevity treatment of 17-alpha estradiol
Rami Alsabbagh, Leah LaVerde, Emma Chufar, Jake W. Willows, Kristy L. Townsend, Sarah B. Peters Archives of Oral Biology.2025; 171: 106170. CrossRef - Association between Metabolic Syndrome and Tooth Loss among Korean Adults: Analysis of the 2007~2018 Korea National Health and Nutrition Examination Survey
Jung-Hui Son, Soo-Myoung Bae Journal of Dental Hygiene Science.2024; 24(4): 335. CrossRef - Investigation of Changes in Dental Pulp Tissue in Rats with Bilateral Ovariectomy by Histopathological Methods
Elif Pinar Bakir, Şeyhmus Bakir, Büşra Deveci, Firat Şahin, Firat Aşir, Engin Deveci The Journal of Dentists.2021; 9: 16. CrossRef - Short-term and long-term effects of osteoporosis on incisor teeth and femoral bones evaluated by Raman spectroscopy and energy dispersive X-ray analysis in ovariectomized rats
Fernanda Rossi Paolillo, Renan Arnon Romano, Luciana de Matos, Airton Abrahão Martin, Francisco Eduardo Gontijo Guimarães, Jarbas Caiado de Castro Neto, Vanderlei Salvador Bagnato Journal of Bone and Mineral Metabolism.2019; 37(1): 18. CrossRef
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The effect of NaOCl treatment and sterilization procedures on the corrosion of endodontic files
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Won-Kyung Yang, Yoon-Sik Ra, Young-Kyoo Lee, Ho-Hyun Son, Mi-Ri Kim
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J Korean Acad Conserv Dent 2005;30(2):121-127. Published online March 31, 2005
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DOI: https://doi.org/10.5395/JKACD.2005.30.2.121
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Abstract
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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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MMP-1 and TIMP-1 production in MG-63 cells stimulated with Prevotella nigrescens lipopolysaccharide
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Won-Kyung Yang, Mi-Ri Kim, Won-Jun Shon, In-Bog Lee, Byeong-Hoon Cho, Chung-Moon Um, Ho-Hyun Son
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J Korean Acad Conserv Dent 2004;29(5):470-478. Published online September 30, 2004
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DOI: https://doi.org/10.5395/JKACD.2004.29.5.470
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Abstract
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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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