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Case Reports
Fiber-reinforced composite post removal using guided endodontics: a case report
Changgi Cho, Hyo Jin Jo, Jung-Hong Ha
Restor Dent Endod 2021;46(4):e50.   Published online September 23, 2021
DOI: https://doi.org/10.5395/rde.2021.46.e50
AbstractAbstract PDFPubReaderePub

Although several techniques have been proposed to remove fiber-reinforced composite (FRC) post, no safe and efficient technique has been established. Recently, a guided endodontics technique has been introduced in cases of pulp canal obliteration. This study describes 2 cases of FRC post removal from maxillary anterior teeth using this guided endodontics technique with a dental operating microscope. Optically scanned data set from plaster cast model was superimposed with the data set of cone-beam computed tomography. By implant planning software, the path of a guide drill was selected. Based on them, a customized stent was fabricated and utilized to remove the FRC post. Employing guided endodontics, the FRC post was removed quickly and safely with minimizing the loss of the remaining tooth structure. The guided endodontics was a useful option for FRC post removal.

Citations

Citations to this article as recorded by  
  • Application of 3D-printed resin guides for the removal of molar fiber posts
    Yumin Wu, Lumei Huang, Bing Ge, Yuhang Zhang, Juan Zhang, Haifeng Xie, Ye Zhu, Chen Chen
    Journal of Dentistry.2025; 153: 105462.     CrossRef
  • Impact of Guided Endodontics on the Success of Endodontic Treatment: An Umbrella Review of Systematic Reviews and Meta-Analyses
    Aakansha Puri, Dax Abraham, Alpa Gupta
    Cureus.2024;[Epub]     CrossRef
  • Endodontia guiada por tomografia computadorizada de feixe cônico
    Maysa Gaudereto Laurindo, Celso Neiva Campos, Anamaria Pessoa Pereira Leite, Paola Cantamissa Rodrigues Ferreira
    Cadernos UniFOA.2024; 19(54): 1.     CrossRef
  • Removal of fiber posts using conventional versus guided endodontics: a comparative study of dentin loss and complications
    R. Krug, F. Schwarz, C. Dullin, W. Leontiev, T. Connert, G. Krastl, F. Haupt
    Clinical Oral Investigations.2024;[Epub]     CrossRef
  • Accuracy and Efficiency of the Surgical-Guide-Assisted Fiber Post Removal Technique for Anterior Teeth: An Ex Vivo Study
    Ryota Ito, Satoshi Watanabe, Kazuhisa Satake, Ryuma Saito, Takashi Okiji
    Dentistry Journal.2024; 12(10): 333.     CrossRef
  • Endodontic management of severely calcified mandibular anterior teeth using guided endodontics: A report of a case and a review of the literature
    Mina Davaji, Sahar Karimpour
    Saudi Endodontic Journal.2024; 14(2): 245.     CrossRef
  • A laboratory study comparing the static navigation technique using a bur with a conventional freehand technique using ultrasonic tips for the removal of fibre posts
    Francesc Abella Sans, Zeena Tariq Alatiya, Gonzalo Gómez Val, Venkateshbabu Nagendrababu, Paul Michael Howell Dummer, Fernando Durán‐Sindreu Terol, Juan Gonzalo Olivieri
    International Endodontic Journal.2024; 57(3): 355.     CrossRef
  • A three‐dimensional printed assembled sleeveless guide system for fiber‐post removal
    Yang Xue, Lei Zhang, Ye Cao, Yongsheng Zhou, Qiufei Xie, Xiaoxiang Xu
    Journal of Prosthodontics.2023; 32(2): 178.     CrossRef
  • Accuracy of a 3D printed sleeveless guide system used for fiber post removal: An in vitro study
    Siyi Mo, Yongwei Xu, Lei Zhang, Ye Cao, Yongsheng Zhou, Xiaoxiang Xu
    Journal of Dentistry.2023; 128: 104367.     CrossRef
  • Expert consensus on digital guided therapy for endodontic diseases
    Xi Wei, Yu Du, Xuedong Zhou, Lin Yue, Qing Yu, Benxiang Hou, Zhi Chen, Jingping Liang, Wenxia Chen, Lihong Qiu, Xiangya Huang, Liuyan Meng, Dingming Huang, Xiaoyan Wang, Yu Tian, Zisheng Tang, Qi Zhang, Leiying Miao, Jin Zhao, Deqin Yang, Jian Yang, Junqi
    International Journal of Oral Science.2023;[Epub]     CrossRef
  • Knowledge, attitude, practice and perception survey on post and core restorations
    Aruna Kumari Veronica, Shamini Sai, Anand V Susila
    Endodontology.2023; 35(3): 228.     CrossRef
  • 452 View
  • 19 Download
  • 7 Web of Science
  • 11 Crossref
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Bioblock technique to treat severe internal resorption with subsequent periapical pathology: a case report
Márk Fráter, Tekla Sáry, Sufyan Garoushi
Restor Dent Endod 2020;45(4):e43.   Published online August 18, 2020
DOI: https://doi.org/10.5395/rde.2020.45.e43
AbstractAbstract PDFPubReaderePub

A variety of therapeutic modalities can be used for the endodontic treatment of a traumatized tooth with internal root resorption (IRR). The authors present a case report of the successful restoration of a traumatized upper central incisor that was weakened due to severe IRR and subsequent periapical lesion formation. A 20-year-old female patient was referred to our clinic with severe internal resorption and subsequent periapical pathosis destroying the buccal bone wall. Root canal treatment had been initiated previously at another dental practice, but at that time, the patient's condition could not be managed even with several treatments. After cone-beam computed tomography imaging and proper chemomechanical cleaning, the tooth was managed with a mineral trioxide aggregate plug followed by root canal filling using short fiber-reinforced composite, known as the Bioblock technique. This report is the first documentation of the use of the Bioblock technique in the restoration of a traumatized tooth. The Bioblock technique appears to be ideal for restoring wide irregular root canals, as in cases of severe internal resorption, because it can uniquely fill out the hollow irregularities of the canal. However, further long-term clinical investigations are required to provide additional information about this new technique.

Citations

Citations to this article as recorded by  
  • Üvegszálas fogászati kompozit tömőanyag keménysége a gyökércsatornában: nanoindentációs vizsgálat
    András Jakab, Kata Lilla Vánkay, Tamás Tarjányi, Gábor Gulyás, Krisztián Bali, Pál Patrik Dézsi, Márton Sámi, Márk Fráter
    Fogorvosi Szemle.2024; 117(2): 47.     CrossRef
  • Evaluation of microhardness of short fiber-reinforced composites inside the root canal after different light curing methods – An in vitro study
    Márk Fráter, János Grosz, András Jakab, Gábor Braunitzer, Tamás Tarjányi, Gábor Gulyás, Krisztián Bali, Paula Andrea Villa-Machado, Sufyan Garoushi, András Forster
    Journal of the Mechanical Behavior of Biomedical Materials.2024; 150: 106324.     CrossRef
  • Imaging techniques and various treatment modalities used in the management of internal root resorption: A systematic review
    R. S Digholkar, S D Aggarwal, P S Kurtarkar, P. B Dhatavkar, V L Neil, D N Agarwal
    Endodontology.2023; 35(2): 85.     CrossRef
  • The Impact of the Preferred Reporting Items for Case Reports in Endodontics (PRICE) 2020 Guidelines on the Reporting of Endodontic Case Reports
    Sofian Youssef, Phillip Tomson, Amir Reza Akbari, Natalie Archer, Fayjel Shah, Jasmeet Heran, Sunmeet Kandhari, Sandeep Pai, Shivakar Mehrotra, Joanna M Batt
    Cureus.2023;[Epub]     CrossRef
  • Fatigue performance of endodontically treated premolars restored with direct and indirect cuspal coverage restorations utilizing fiber-reinforced cores
    Márk Fráter, Tekla Sáry, Janka Molnár, Gábor Braunitzer, Lippo Lassila, Pekka K. Vallittu, Sufyan Garoushi
    Clinical Oral Investigations.2022; 26(4): 3501.     CrossRef
  • 433 View
  • 18 Download
  • 5 Crossref
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Fiber-reinforced composite resin bridges: an alternative method to treat root-fractured teeth
Gun Heo, Eun-Hye Lee, Jin-Woo Kim, Kyung-Mo Cho, Se-Hee Park
Restor Dent Endod 2020;45(1):e8.   Published online December 27, 2019
DOI: https://doi.org/10.5395/rde.2020.45.e8
AbstractAbstract PDFPubReaderePub

The replacement of missing teeth, especially in the anterior region, is an essential part of dental practice. Fiber-reinforced composite resin bridges are a conservative alternative to conventional fixed dental prostheses or implants. It is a minimally invasive, reversible technique that can be completed in a single visit. The two cases presented herein exemplify the treatment of root-fractured anterior teeth with a natural pontic immediately after extraction.

Citations

Citations to this article as recorded by  
  • Current Evidence on the Fiber-reinforced Composite Bridges
    Ramesh Chowdhary, Sunil Kumar Mishra
    International Journal of Prosthodontics and Restorative Dentistry.2023; 12(4): 159.     CrossRef
  • Bridging the Gap: A Case Report of Tooth Replacement using Resin-Bonded Fiber- Reinforced Composite Resin
    Vineet Sharma, Sumit Bhansali, Sonal Priya Bhansali
    Journal of Pierre Fauchard Academy (India Section).2023; : 66.     CrossRef
  • Reconstruction of Natural Smile and Splinting with Natural Tooth Pontic Fiber‐Reinforced Composite Bridge
    Maryam S. Tavangar, Fatemeh Aghaei, Massoumeh Nowrouzi, Andrea Scribante
    Case Reports in Dentistry.2022;[Epub]     CrossRef
  • 247 View
  • 4 Download
  • 3 Crossref
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Research Article
Fracture resistance of upper central incisors restored with different posts and cores
Maryam Rezaei Dastjerdi, Kamran Amirian Chaijan, Saeid Tavanafar
Restor Dent Endod 2015;40(3):229-235.   Published online July 24, 2015
DOI: https://doi.org/10.5395/rde.2015.40.3.229
AbstractAbstract PDFPubReaderePub
Objectives

To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores.

Materials and Methods

Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced composite (FRC) post and composite core (group 2), composite post and core (group 3), and controls (group 4). Mesio-distal and bucco-lingual dimensions at 7 and 14 mm from the apex were compared to ensure standardization among the groups. Twelve teeth were prepared for crown restoration (group 4). Teeth in other groups were endodontically treated, decoronated at 14 mm from the apex, and prepared for posts and cores. Resin-based materials were used for cementation in groups 1 and 2. In group 3, composite was used directly to fill the post space and for core build-up. All samples were restored by standard metal crowns using glass ionomer cement, mounted at 135° vertical angle, subjected to thermomechanical aging, and then fractured using a universal testing machine. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the data.

Results

Fracture resistance of the groups was as follows: Control (group 4) > cast post and core (group 1) > fiber post and composite core (group 2) > composite post and core (group 3). All samples in groups 2 and 3 fractured in restorable patterns, whereas most (58%) in group 1 were non-restorable.

Conclusions

Within the limitations of this study, FRC posts showed acceptable fracture resistance with favorable fracture patterns for reconstruction of upper central incisors.

Citations

Citations to this article as recorded by  
  • Effect of Ferrule Height on the Fracture Resistance of Endodontically Treated Teeth Restored With Glass Fiber Posts: An In Vitro Study
    Sneha Rathaur, Pankaj K Gupta, Sonal Dhote, Kumari S Pravin, Komal Kishlay, Seema Gupta
    Cureus.2025;[Epub]     CrossRef
  • Influence of Contracted Endodontic Cavity Design on the Debridement Efficacy of Three Different Irrigant Activation Systems in Human Permanent Mandibular Molars: A Scanning Electron Microscopy Analysis
    Srilekha Jayakumar, Vignesh Srinivasan, Janani Karunakaran, Jwaalaa Rajkumar, Vashni Solomon, Aarthi Thiagarajan
    World Journal of Dentistry.2025; 16(1): 62.     CrossRef
  • The Effect of Additional Silane Pre-Treatment on the Microtensile Bond Strength of Resin-Based Composite Post-and-Core Build-Up Material
    Chia-Ying Wu, Keigo Nakamura, Aya Miyashita-Kobayashi, Akiko Haruyama, Yukiko Yokoi, Akihiro Kuroiwa, Nobuo Yoshinari, Atsushi Kameyama
    Applied Sciences.2024; 14(15): 6637.     CrossRef
  • The Influence on Fracture Resistance of Different Composite Resins and Prefabricated Posts to Restore Endodontically Treated Teeth
    Saulo Pamato, Weber Adad Ricci, Milton Carlos Kuga, Eliane Cristina Gulin de Oliveira, João Carlos Silos Moraes, Marcus Vinicius Reis Só, Tamara Carolina Trevisan, Newton Fahl Júnior, Jefferson Ricardo Pereira
    Polymers.2023; 15(1): 236.     CrossRef
  • Comparison of the pull-out bond strength of endodontically treated anterior teeth with monolithic zirconia endocrown and post-and-core crown restorations
    Durmus A. Bozkurt, Emine B. Buyukerkmen, Arslan Terlemez
    Journal of Oral Science.2023; 65(1): 1.     CrossRef
  • Minimally invasive access cavities in endodontics
    Lubna A Abdulrazaq, Ahmed H Ali, Federico Foschi
    Journal of Baghdad College of Dentistry.2023; 35(2): 65.     CrossRef
  • Comparison of Fracture Resistance of Endodontically Treated Teeth With Traditional Endodontic Access Cavity, Conservative Endodontic Access Cavity, Truss Endodontic Access Cavity, and Ninja Endodontic Access Cavity Designs: An In Vitro Study
    Prasad Patil , Pooja Newase, Swapnil Pawar, Hasmukh Gosai , Dharmendra Shah, Sameer M Parhad
    Cureus.2022;[Epub]     CrossRef
  • Effect of different access cavity designs on fracture toughness of endodontically treated teeth: a systematic review and network meta-analysis
    Momina A. Motiwala, Meisha Gul, Robia Ghafoor
    Evidence-Based Dentistry.2022;[Epub]     CrossRef
  • Fracture resistance of polyetheretherketone, Ni-Cr, and fiberglass postcore systems: An in vitro study
    Hossein Pourkhalili, Donya Maleki
    Dental Research Journal.2022; 19(1): 20.     CrossRef
  • The effect of bulk-fill composites: Activa and Smart Dentin Replacement on cuspal deflection in endodontically treated teeth with different access cavity designs
    Rupali Karale, BJ Prathima, BR Prashanth, NS Shivaranjan, Neha Jain
    Journal of Conservative Dentistry.2022; 25(4): 375.     CrossRef
  • Efficacy of Root Canal Instrumentation and Fracture Strength Assessment in Primary Molars after Preparing Two Different Shapes of Access Cavity: An Ex Vivo Histological Study
    Yashika Singhal, Vandana Reddy
    International Journal of Clinical Pediatric Dentistry.2021; 14(4): 518.     CrossRef
  • MANAGEMENT OF ELISS CLASS IV FRACTURE USING FIBER POST : A CASE REPORT
    Shivangi Shreya, Neha Verma
    INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH.2021; : 13.     CrossRef
  • Effect of intracanal diode laser irradiation on fracture resistance of roots restored with CAD/CAM posts
    Flavia Florentino Teixeira da Silva, André Hayato Saguchi, Sidnea Aparecida Freitas Paiva, Guilherme Espósito Pires, Mariana Isidoro, Aldo Brugnera Junior, Paulo Francisco Cesar, Ângela Toshie Araki
    Brazilian Journal of Oral Sciences.2021;[Epub]     CrossRef
  • Does ultraconservative access affect the efficacy of root canal treatment and the fracture resistance of two‐rooted maxillary premolars?
    A. A. Silva, F. G. Belladonna, G. Rover, R. T. Lopes, E. J. L. Moreira, G. De‐Deus, E. J. N. L. Silva
    International Endodontic Journal.2020; 53(2): 265.     CrossRef
  • Effect of Glass Fiber Post Diameter on Fracture Resistance of Endodontically Treated Teeth
    Saied Nokar, Mahsa Sadat Mortazavi, Somayeh Niakan
    Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2020;[Epub]     CrossRef
  • One‐step fiber post cementation and core build‐up in endodontically treated tooth: A clinical case report
    José Mauricio dos Santos Nunes Reis, Carlos R. de Moura Oliveira, Erica G. J. Reis, Bruno A. Mascaro, Filipe de Oliveira Abi‐Rached
    Journal of Esthetic and Restorative Dentistry.2020; 32(1): 5.     CrossRef
  • Impact of contracted endodontic cavities on fracture resistance of endodontically treated teeth: a systematic review of in vitro studies
    Emmanuel João Nogueira Leal Silva, Gabriela Rover, Felipe Gonçalves Belladonna, Gustavo De-Deus, Cleonice da Silveira Teixeira, Tatiana Kelly da Silva Fidalgo
    Clinical Oral Investigations.2018; 22(1): 109.     CrossRef
  • Fracture Strength of Endodontically Treated Teeth with Different Access Cavity Designs
    Gianluca Plotino, Nicola Maria Grande, Almira Isufi, Pietro Ioppolo, Eugenio Pedullà, Rossella Bedini, Gianluca Gambarini, Luca Testarelli
    Journal of Endodontics.2017; 43(6): 995.     CrossRef
  • Comparison of push-out bond strength of fiber-reinforced composite resin posts according to cement thickness
    Jun-Seong Park, Jeong-Sub Lee, Jeong-Won Park, Won-Gyun Chung, Eun-Hee Choi, Yoon Lee
    The Journal of Prosthetic Dentistry.2017; 118(3): 372.     CrossRef
  • Tratamiento restaurador de lesiones dentales traumáticas. Reporte de tres casos clínicos
    Johann Vladimir Uzcátegui Quintero, Alinne Hernández Ayala, Ricardo González Plata, Enrique Ríos Szalay
    Revista Odontológica Mexicana.2017; 21(3): 185.     CrossRef
  • The effects of post and core material combination on the surface strain of the 4-unit zirconia fixed partial denture margins
    Yoko ISHIKAWA, Wataru KOMADA, Tasuku INAGAKI, Reina NEMOTO, Satoshi OMORI, Hiroyuki MIURA
    Dental Materials Journal.2017; 36(6): 798.     CrossRef
  • Restorative treatment of traumatic dental injuries. Report of three clinical cases
    Johann Vladimir Uzcátegui Quintero, Alinne Hernández Ayala, Ricardo González Plata, Enrique Ríos Szalay
    Revista Odontológica Mexicana.2017; 21(3): e179.     CrossRef
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  • 22 Crossref
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Case Reports
An esthetic appliance for the management of crown-root fracture: a case report
Sang-Min Jeon, Kang-Hee Lee, Bock-Young Jung
Restor Dent Endod 2014;39(3):226-229.   Published online May 22, 2014
DOI: https://doi.org/10.5395/rde.2014.39.3.226
AbstractAbstract PDFPubReaderePub

Orthodontic extrusion is usually performed by means of a fixed orthodontic appliance that utilizes arch wire attached to adjacent teeth and transfers the desired force by elastic from the wire to the root. However, clinicians often encounter cases where the bonding required for tooth traction is not possible because the adjacent teeth have been restored with ceramic or veneer. The purpose of this case report is to describe a modified orthodontic extrusion appliance that is useful when conventional orthodontic treatment is not possible. The modified appliance was fabricated using an artificial tooth, clear plastic sheeting, and a braided fiber-reinforced composite strip that covered adjacent teeth without bonding. It satisfied the esthetic and functional needs of the patient and established the optimal biologic width.

Citations

Citations to this article as recorded by  
  • Esthetic enhancement of a traumatized anterior tooth with a combination of forced eruption and tooth alignment: a case report
    So-Hee Kang, Jung-Hong Ha, Myoung-Uk Jin, Sung-Kyo Kim, Young-Kyung Kim
    Restorative Dentistry & Endodontics.2016; 41(3): 210.     CrossRef
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Esthetic rehabilitation of single anterior edentulous space using fiber-reinforced composite
Hyeon Kim, Min-Ju Song, Su-Jung Shin, Yoon Lee, Jeong-Won Park
Restor Dent Endod 2014;39(3):220-225.   Published online May 19, 2014
DOI: https://doi.org/10.5395/rde.2014.39.3.220
AbstractAbstract PDFPubReaderePub

A fiber-reinforced composite (FRC) fixed prosthesis is an innovative alternative to a traditional metal restoration, as it is a conservative treatment method. This case report demonstrates a detailed procedure for restoring a missing anterior tooth with an FRC. A 44-year-old woman visited our department with an avulsed tooth that had fallen out on the previous day and was completely dry. This tooth was replanted, but it failed after one year. A semi-direct technique was used to fabricate a FRC fixed partial prosthesis for its replacement. The FRC framework and the pontic were fabricated using a duplicated cast model and nanofilled composite resin. Later on, interproximal contact, tooth shape, and shade were adjusted at chairside. This technique not only enables the clinician to replace a missing tooth immediately after extraction for minimizing esthetic problems, but it also decreases both tooth reduction and cost.

Citations

Citations to this article as recorded by  
  • Anterior provisional fixed partial dentures: A finite element analysis
    Nouf Almeganni, Rotana Abulaban, Ghada Naguib, Mohamed Tharwat, Hani M. Nassar
    Journal of Prosthodontics.2024; 33(4): 367.     CrossRef
  • FİBERLE GÜÇLENDİRİLMİŞ ADEZİV KÖPRÜLER VE UYGULAMA YÖNTEMLERİ
    Gözde YALÇIN, Asude Dilek NALBANT
    Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2022; : 1.     CrossRef
  • Fiber-reinforced composite resin bridges: an alternative method to treat root-fractured teeth
    Gun Heo, Eun-Hye Lee, Jin-Woo Kim, Kyung-Mo Cho, Se-Hee Park
    Restorative Dentistry & Endodontics.2020;[Epub]     CrossRef
  • A New Technique for Direct Fabrication of Fiber-Reinforced Composite Bridge: A Long-Term Clinical Observation
    Matías Ferrán Escobedo Martínez, Samuel Rodríguez López, Jairo Valdés Fontela, Sonsoles Olay García, Mario Mauvezín Quevedo
    Dentistry Journal.2020; 8(2): 48.     CrossRef
  • Customized Treatment Option for Malpositioned Dental Implant Placed in Aesthetic Zone
    Priyanka N. Khungar, Trupti M. Dahane, Ramnath P. Revankar, Rupali Patel
    Journal of Evolution of Medical and Dental Sciences.2020; 9(39): 2930.     CrossRef
  • Fiber reinforced composite bridge as a replacement for missing upper permanent lateral incisor – a case report
    Ana Todorović, Danica Popović, Igor Djordjević, Vojkan Lazić
    Stomatoloski glasnik Srbije.2016; 63(3): 133.     CrossRef
  • Evaluation of the Viability of Rat Periodontal Ligament Cells after Storing at 0℃/2 MPa Condition up to One Week: In Vivo MTT Method
    Sun Mi Jang, Sin-Yeon Cho, Eui-Seong Kim, Il-Young Jung, Seung Jong Lee
    Journal of Korean Dental Science.2016; 9(1): 1.     CrossRef
  • Semidirect Restorations in Multidisciplinary Treatment: Viable Option for Children and Teenagers
    Mateus Rodrigues Tonetto, Milton Carlos Kuga, Fausto Frizzera, Matheus Coelho Bandeca, Shilpa H Bhandi, Célia Regina Maio Pinzan-Vercelino, Monica Barros da Silva, Kamila Figueiredo Pereira
    The Journal of Contemporary Dental Practice.2015; 16(4): 280.     CrossRef
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Original Article
Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites
Joongwon Yom, In-Bog Lee
J Korean Acad Conserv Dent 2009;34(4):364-370.   Published online July 31, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.4.364
AbstractAbstract PDFPubReaderePub

The aim of this study was to evaluate the effect of fiber direction on the polymerization shrinkage of fiber-reinforced composite. The disc-shaped flowable composite specimens (d = 10 mm, h = 2 mm, Aeliteflo A2, Bisco, Inc., IL, USA) with or without glass fiber bundle (X-80821P Glass Fiber, Bisco, Inc., IL, USA) inside were prepared, and the longitudinal and transversal polymerization shrinkage of the specimens on radial plane were measured with strain gages (Linear S-series 350ω, CAS, Seoul, Korea). In order to measure the free polymerization shrinkage of the flowable composite itself, the disc-shaped specimens (d = 7 mm, h = 1 mm) without fiber were prepared, and the axial shrinkage was measured with an LVDT (linear variable differential transformer) displacement sensor. The cross-section of the polymerized specimens was observed with a scanning electron microscope to examine the arrangement of the fiber bundle in composite. The mean polymerization shrinkage value of each specimen group was analyzed with ANOVA and Scheffe post-hoc test (α=0.05).

The radial polymerization shrinkage of fiber-reinforced composite was decreased in the longitudinal direction of fiber, but increased in the transversal direction of fiber (p<0.05). We can conclude that the polymerization shrinkage of fiber-reinforced composite splint or restoratives is dependent on the direction of fiber.

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