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Albashaireh ZSM, Sbeih YK. The effect of ferrule and core material on fracture resistance of endodontically treated anterior teeth restored with ceramic crowns after artificial aging. J Dent 2024; 147:105106. [PMID: 38830530 DOI: 10.1016/j.jdent.2024.105106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/28/2024] [Accepted: 05/31/2024] [Indexed: 06/05/2024] Open
Abstract
OBJECTIVES To assess the influence of ferrule and core type on the fracture strength of endodontically treated anterior teeth (ETAT) and identify the failure mode type and distribution across different core types and ferrule conditions. METHODS Sixty extracted human central incisors were endodontically treated, decoronated and divided into two main groups (F=with ferrule, NF=no ferrule). Each main group was further subdivided into three subgroups according to the core material used: direct composite cores (DC), Ribbond fibre-reinforced composite cores (RIB-DC), and glass fibre post (GFP) with direct composite cores (GFP-DC). All specimens received E.max crowns and underwent thermal cycling and cyclic loading. Subsequently, the fracture resistance was tested with static loads applied to the crown restoration. Two-Way ANOVA and Chi square tests identified significant differences among the groups (p < 0.05). RESULTS The means and standard deviations (SD) of fracture loads in Newtons (N) for specimens in the F subgroups were RIB-DC: 465.0 (104.20), GFP-DC: 367.6 (79.59), DC: 275.8 (68.48), and in NF subgroups were RIB-DC: 110.8 (24.33), GFP-DC: 95.6 (25.47), DC: 67.4 (7.46). Specimens with ferrule yielded significantly higher fracture loads than those without ferrule (p = 0.0054). In the F groups, fracture loads of specimens with RIB-DC cores were significantly higher than those with GFP-DC (p = 0.0019) and those with DC (p = 0.0001). Moreover, fracture loads for the GFP-DC were significantly higher than those for the DC (p = 0.0026). The GFP-DC specimens showed the highest incidence of catastrophic failures (p = 0.0420). CONCLUSIONS Using fibre-reinforced composite (FRC) cores significantly increased fracture resistance in ETAT with ferrule. The failure modes repairable and possibly repairable were dominant in most specimens. CLINICAL SIGNIFICANCE When restoring ETAT with insufficient coronal tooth structure, preserving 2 mm of tooth structure ferrule and preparing cores with FRC can increase fracture resistance and reduce the incidence of non-repairable catastrophic fractures of teeth.
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Affiliation(s)
- Zakereyya S M Albashaireh
- Department of Conservative Dentistry, Jordan University of Science and Technology, P.O. BOX 3030, Irbid 22110, Jordan.
| | - Yasmeena K Sbeih
- Department of Conservative Dentistry, Jordan University of Science and Technology, P.O. BOX 3030, Irbid 22110, Jordan
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AlJarboua RT, Alshihry RA, Alkhaldi HO, Al Marar FH, Aljaffary MA, Almana ML, Balhaddad AA, Alkhateeb O. Effect of Fiber-Reinforced Composite Placement Site on Fracture Resistance of Premolar Teeth: An in vitro Study. Clin Cosmet Investig Dent 2024; 16:255-266. [PMID: 39006828 PMCID: PMC11244617 DOI: 10.2147/ccide.s461134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 06/21/2024] [Indexed: 07/16/2024] Open
Abstract
Background This study aimed to investigate the fracture behavior of upper premolars with deep MOD cavities that were restored with Ribbond resin-reinforced fibers (FRCs) placed in different orientations. Methods A total of 54 extracted maxillary premolars were randomly divided into nine groups. The experimental groups underwent MOD cavity preparation with or without root canal treatment, followed by FRCs placed in the pulpal floor, proximal walls, or both. Fracture resistance was tested using an Instron Machine. The samples were visually inspected to analyze the fracture mode. Results The highest fracture resistance was observed in intact teeth (1299.98 ± 284.66 MPa). Placing Ribbond fibers in the pulpal floor (1155.86 ± 244.21 MPa) or the proximal walls (1077.56 ± 260.60 MPa) significantly improved fracture resistance (p= <0.05), compared to cavities restored with only resin composite (804.58 ± 93.34 MPa). However, placing Ribbond fibers in both the pulpal and proximal walls did not enhance fracture resistance. In the MOD-RCT groups, fracture resistance was improved only when Ribbond fibers were placed in the pulpal floor and the proximal walls. Fracture mode analysis revealed a combined fracture in most of the groups. Conclusion This study concluded that using FRCs significantly improved the fracture resistance of MOD cavities in premolars and revealed that the placement site could be a determinant factor.
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Affiliation(s)
- Raghad Tariq AlJarboua
- Internship Program, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Reem Ahmad Alshihry
- Internship Program, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Haya Othman Alkhaldi
- Internship Program, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Fadak Hussain Al Marar
- Internship Program, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammed A Aljaffary
- College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammed L Almana
- College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Abdulrahman A Balhaddad
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Othman Alkhateeb
- College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Canobra LF, Parra-Gatica E, Sanhueza V, Medina C, Wendler M. Fracture Resistance and Failure Mode of Polyethylene Fiber-reinforced Resin-based Restorations in Structurally Compromised Premolars: an in Vitro Study. Oper Dent 2024; 49:455-464. [PMID: 38978307 DOI: 10.2341/23-138-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2024] [Indexed: 07/10/2024]
Abstract
OBJECTIVE To evaluate the effect of polyethylene fiber-reinforcement on the fracture resistance and fracture mode of extensive resin-based composite (RBC) restorations in structurally compromised maxillary premolars. METHODS AND MATERIALS Maxillary premolars (54) with specific dimensions and extracted for orthodontic reasons were used. Following mesio-occluso-distal (MOD) cavity preparation and endodontic access, teeth were randomly assigned to one of three restorative protocols (n=18): RBC applied incrementally (I) or reinforced with woven polyethylene fibers (Ribbond) placed horizontally (H) or U-shaped (U). Restored teeth were stored for 45 days in distilled water at 37°C and then loaded monotonically until fracture. Half of the specimens in each group received axial loading (A) and the other half was loaded paraxially (PA). Fracture load data was assessed using two-way analysis of variance and Tukey's post hoc test for multiple comparisons (α=0.05). The fracture initiation and propagation path were analyzed using stereomicroscopy and scanning-electron microscopy. RESULTS No significant differences were observed for the fracture strength among loading configurations, except for groups IA (825 N) and HA (553 N). Fracture initiated and propagated mainly at and through the RBC restoration in the I group, whereas a shift to the interface was observed in both polyethylene fiber-reinforced groups. Blocking and bridging of cracks were identified around the fibers, especially in specimens of group U. CONCLUSIONS Incorporation of woven polyethylene fibers to reinforce extensive MOD resin-based composite restorations on endodontically treated premolars reduced the occurrence of cohesive fractures in the restorative material but was unable to increase the fracture resistance of the affected teeth.
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Affiliation(s)
- L F Canobra
- Luis Felipe Canobra, DDS, Facultad de Odontología, Universidad San Sebastián, Sede de la Patagonia, Puerto Montt, Chile, and Master's Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Chile
| | - E Parra-Gatica
- Elizabeth Parra-Gatica, DDS, Master's Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Chile
| | - V Sanhueza
- Vilma Sanhueza, PhD, Instituto de Geología Económica Aplicada (GEA), Universidad de Concepción, Chile
| | - C Medina
- Carlos Medina, PhD, Department of Mechanical Engineering (DIM), Faculty of Engineering (FI), Universidad de Concepción, Chile
| | - M Wendler
- *Michael Wendler, DDS, PhD, Department of Restorative Dentistry, Faculty of Dentistry, Universidad de Concepción, Chile, and Master's Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Chile
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Albar NHM. Evaluation of Fracture Resistance of Reattached Tooth Fragments Restored Using Fiber-reinforced Composites: A Systematic Review. J Contemp Dent Pract 2024; 25:605-615. [PMID: 39364829 DOI: 10.5005/jp-journals-10024-3710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2024]
Abstract
AIM AND BACKGROUND This systematic review examined the current literature to evaluate the fracture resistance of the tooth fragments reattached using fiber-reinforced composites (FRC). MATERIALS AND METHODS An electronic search was performed on Scopus, PubMed, and Web of Science databases according to specific inclusion and exclusion criteria to identify relevant articles to be included until January 2023. Articles with full text available in the English language for randomized control studies, observational studies, retrospective studies, and in vitro studies conducted on permanent human teeth were selected. The risk of bias was assessed in all studies using the OHAT tool. RESULTS Out of 16 search results, seven in vitro studies with a total of 415 samples were included in the review. Three studies reported that reinforcement using rigid FRC posts improves fracture resistance of reattached anterior teeth, three studies reported that reinforcement using flexible fiber bundles enhances the fracture strength of reattached posterior teeth and one study reported that the use of flexible polyethylene fibers improves fracture resistance in molars with reattached cusps. CONCLUSION Within the limitations of the studies included in the review, there is low-quality evidence that reinforcement of reattached fragments using FRC posts or fibers improves fracture resistance. CLINICAL SIGNIFICANCE The reattached fractured fragments may be susceptible to re-fracture. The use of FRC to reinforce the resin composite used for reattachment may enhance the bond strength and increase resistance to fracture. How to cite this article: Albar NHM. Evaluation of Fracture Resistance of Reattached Tooth Fragments Restored Using Fiber-reinforced Composites: A Systematic Review. J Contemp Dent Pract 2024;25(6):605-615.
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Affiliation(s)
- Nassreen Hassan Mohammad Albar
- Department of Restorative Dentistry, College of Dentistry, Jazan University, Jazan, Saudi Arabia, Phone: +966 5050745812, e-mail: , Orcid: https://orcid.org/0000-0002-8163-4712
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Jadhav GR, Mittal P, Shinde S, Al-Qarni MA, Al-Obaid M, Abullais SS, Cicciù M, Minervini G. Biomimetic approach to strengthen the incisal fracture composite build-up: an in vitro study. BMC Oral Health 2024; 24:42. [PMID: 38191343 PMCID: PMC10773035 DOI: 10.1186/s12903-023-03679-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/20/2023] [Indexed: 01/10/2024] Open
Abstract
OBJECTIVE Incisal composite build-up shows a high failure susceptibility. The incorporation of fiber-reinforced composite (FRC) during composite restoration could improve its strength. Hence the study was planned to compare the effect of various positions of FRC on the strength of composite resin incisal build-ups. METHODS In maxillary incisors (n = 90), 3 mm of the incisal edge was cut and teeth were categorized into three groups based on the location and number of fibers used during incisal composite build-up - Group I: composite resin; Group II: composite resin and a single fiber palatally and Group III: composite resin along with two fibers palatally. RESULTS The data showed that group II had the maximum load-bearing values followed by group I and group III. CONCLUSION Within the confines of our study, it can be concluded that the addition of FRC to the conventional incisal composite build-up increased the overall strength restoration. Such composite restoration reinforced with a single fiber on the palatal side showed the highest load-bearing capacity compared to two fibers reinforced and unreinforced composites. The common mode of failure in group I was in composite resin, in two fibers reinforced at fibers-composite junction, and in one fiber reinforced composite was in the remaining part of the tooth.
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Affiliation(s)
| | - Priya Mittal
- Department of Conservative Dentistry and Endodontics, Swargiya Dadasaheb Kalmegh Smruti Dental College & Hospital, Nagpur, India.
| | - Siddharth Shinde
- Department of Orthodontics and Dentofacial Orthopedics, Bharati Vidyapeeth (Deemed to be University) Dental College and Hospital, Pune, Maharashtra, India
| | - Mohammed A Al-Qarni
- Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, 61471, Saudi Arabia
| | - Mohammed Al-Obaid
- Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, 61471, Saudi Arabia
| | - Shahabe Saquib Abullais
- Department of Periodontics and Community Dental Sciences, King Khalid University, 61421, Abha, KSA, Saudi Arabia
| | - Marco Cicciù
- Department of Biomedical and Surgical and Biomedical Sciences, Catania University, Catania, 95123, Italy
| | - Giuseppe Minervini
- Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, India.
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania "Luigi Vanvitelli", Caserta, 81100, Italy.
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Saravia-Rojas MA, Espinoza-Jiménez G, Huanambal-Tiravanti VA, Geng-Vivanco R. Restoration of a Vital Tooth With Extensive Crown Destruction Using Glass Fiber and Polyethylene Fiber-reinforced Composite Resin: A Clinical Case. Oper Dent 2023; 48:476-482. [PMID: 37635452 DOI: 10.2341/22-127-s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2023] [Indexed: 08/29/2023]
Abstract
Conservative restorative dentistry has been evolving in the last 25 years, focusing mainly on the development of direct restorative materials. Resin-based composites remain an excellent conservative alternative for restoration of teeth with extensive caries lesions. Over time, several strategies have been proposed to improve the mechanical properties of these composites so that they can adequately withstand masticatory forces. Glass fiber-reinforced resin-based composites and their use in situations where there is great loss of tooth structure have gained popularity due to their favorable mechanical properties. Combined techniques with polyethylene fibers can further enhance their clinical performance. This study presents a brief review of their most important qualities and potential use in direct restorative procedures. In addition, a clinical case is described where a vital tooth with extensive coronal destruction was restored using polyethylene fibers embedded in glass fiber-reinforced flowable resin under resin-based composite. The reinforcement of both the remaining tooth structure and the restoration with fibers is a valid treatment option since the network structure formed by the fiber reinforcement can increase the longevity of the direct composite restorations. There are few reports in the literature describing the use of a combined technique using polyethylene fibers embedded in glass fiber-reinforced flowable resin under resin-based composite. Thus, clinical follow-up of this case is required.
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Affiliation(s)
- M A Saravia-Rojas
- *Miguel Ángel Saravia-Rojas, DDS, MSc, PhD, full professor, School of Dentistry, Cayetano Heredia University, Lima, Peru
| | - G Espinoza-Jiménez
- Giulianna Espinoza-Jiménez, undergraduate student, School of Dentistry, Cayetano Heredia University, Lima, Peru
| | - V A Huanambal-Tiravanti
- Victor Abel Huananbal-Tiravanti, DDS, MSc, full professor, School of Dentistry, Cayetano Heredia University, Lima, Peru
| | - R Geng-Vivanco
- Rocio Geng-Vivanco, DDS, MSc, PhD student, Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
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Selvaraj H, Krithikadatta J, Shrivastava D, Onazi MAA, Algarni HA, Munaga S, Hamza MO, Saad Al-Fridy T, Teja KV, Janani K, Alam MK, Srivastava KC. Systematic review fracture resistance of endodontically treated posterior teeth restored with fiber reinforced composites- a systematic review. BMC Oral Health 2023; 23:566. [PMID: 37574536 PMCID: PMC10423428 DOI: 10.1186/s12903-023-03217-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
BACKGROUND Large cavity designs and access cavities impair endodontically treated tooth fracture resistance. As the tooth's strength is known to reduce significantly after the root canal treatment, occlusal loading as a result of functions such as chewing, biting and certain parafunctional tendencies makes the endodontically treated tooth vulnerable to fracture. Hence, after endodontic treatment, it is vital to give adequate and appropriate restorative material to avoid tooth fractures. Accordingly, the choice of such restorative material should be dictated by the property of fracture resistance. OBJECTIVE The goal of this study was to conduct a systematic review and critical analysis of available data from in vitro studies examining the fracture resistance of endodontically treated posterior teeth restored with fiber-reinforced composites. METHODOLOGY The Preferred Reporting Items for Systematic Review and Meta-Analysis (PRIS-MA) Statement was used to guide the reporting of this systematic review A comprehensive literature search was performed using MEDLINE (via PubMed), Scopus, ScienceDirect, Google Scholar, and LILACS. A manual search of the reference lists of the articles was also performed. The databases provided a total of 796 studies from the electronic systematic search. The databases provided a total of 796 studies from the electronic systematic search. Two reviewers scrutinized the papers for eligibility based on inclusion/exclusion criteria and extracted data. The studies were assessed for their potential risk of bias. Based on modified JBI & CRIS (checklist for reporting in vitro studies) guidelines, along with the methodology and treatment objective, we have formulated 13 parameters specifically to assess the risk of bias. A total of 18 studies met the inclusion criteria and were included for qualitative analysis. Considering the high heterogeneity of the studies included, a meta-analysis could not be performed. RESULTS The majority of the included studies had a moderate or high risk of bias. When compared to traditional hybrid composites, fiber-reinforced composites showed increased fracture resistance of endodontically treated teeth in the majority of investigations. On the other hand, limited evidence was found for the bulk fill composites. Moreover, moderate evidence was found for the fracture resistance of inlays and fiber posts with fiber-reinforced composites for core build-up in endodontically treated teeth. No evidence could be found comparing the fracture resistance of endo crowns and fiber-reinforced composites in endodontically treated teeth. CONCLUSION According to the research, using fiber-reinforced composites instead of conventional hybrid composites improves the fracture resistance of endodontically treated teeth. However, there was a high risk of bias in the research considered. No judgments could be reached about the superiority of one material over another based-on comparisons between other core restorations.
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Affiliation(s)
- Harish Selvaraj
- Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, 152006005, India
| | | | - Deepti Shrivastava
- Department of Preventive Dentistry, College of Dentistry, Jouf University, Sakaka, Saudi Arabia
| | - Meshal Aber Al Onazi
- Department of Operative Dentistry and Endodontics, College of Dentistry, Jouf University, Sakaka, 72345, Saudi Arabia
| | - Hmoud Ali Algarni
- Department of Operative Dentistry and Endodontics, College of Dentistry, Jouf University, Sakaka, 72345, Saudi Arabia
| | - Swapna Munaga
- Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud Bin, Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - May Osman Hamza
- Department of Prosthetic Dental Sciences, College of Dentistry, Jouf University, Sakaka, Saudi Arabia
| | | | - Kavalipurapu Venkata Teja
- Department of Conservative Dentistry and Endodontics, Mamata Institute of Dental Sciences, Mamata Educational Society, Bachupally, Hyderabad, 500 090, India
| | - Krishnamachari Janani
- Department of Conservative Dentistry and Endodontics, SRM Dental College, SRM Institute of Science & Technology, Chennai, India
| | - Mohammad Khursheed Alam
- Department of Preventive Dentistry, College of Dentistry, Jouf University, Sakaka, Saudi Arabia
- Department of Dental Research Cell, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, Chennai, 600077, India
- Department of Public Health, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh
| | - Kumar Chandan Srivastava
- Department of Oral & Maxillofacial Surgery & Diagnostic Sciences, College of Dentistry, Jouf University, Sakaka, Saudi Arabia.
- Department of Oral Medicine and Radiology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 602105, India.
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Fatigue performance of endodontically treated molars reinforced with different fiber systems. Clin Oral Investig 2023:10.1007/s00784-023-04934-2. [PMID: 36862198 DOI: 10.1007/s00784-023-04934-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023]
Abstract
OBJECTIVE The aim was to investigate the fatigue performance of root canal-treated (RCT) molars restored with different direct restorations utilizing discontinuous and continuous fiber-reinforced composite (FRC) systems. The impact of direct cuspal coverage was also evaluated. MATERIALS AND METHODS One hundred and twenty intact third molars extracted for periodontal or orthodontic reasons were randomly divided into six groups (n=20). Standardized MOD, regular cavities for direct restorations were prepared in all specimens, and subsequently, root canal treatment and root canal obturation was carried out. After the endodontic treatment, the cavities were restored with different fiber-reinforced direct restorations as follows: SFC group (control), discontinuous short fiber-reinforced composite (SFC) without cuspal coverage (CC); SFC+CC group, SFC with cuspal coverage; PFRC group, transcoronal fixation with continuous polyethylene fibers without CC; PFRC+CC group, transcoronal fixation with continuous polyethylene fibers with CC; GFRC group, continuous glass FRC post without CC; and GFRC+CC, continuous glass FRC post with CC. All specimens underwent a fatigue survival test in a cyclic loading machine until fracture occurred or 40,000 cycles were completed. The Kaplan-Meier survival analysis was conducted, followed by pairwise log-rank post hoc comparisons between the individual groups (Mantel-Cox). RESULTS The PFRC+CC group was characterized by significantly higher survival compared to all the groups (p < 0.05), except for the control group (p = 0.317). In contrast, the GFRC group showed significantly lower survival compared to all the groups (p < 0.05), except for the SFC+CC group (p = 0.118). The control group (SFC) showed statistically higher survival than the SFRC+CC group (p < 0.05) and GFRC group (p < 0.05), but it did not differ significantly from the rest of the groups in terms of survival. CONCLUSIONS Direct restorations utilizing continuous FRC systems (in the form of polyethylene fibers or FRC post) to restore RCT molar MOD cavities performed better in terms of fatigue resistance when CC was performed compared to the same FRC restorations without CC. On the contrary, teeth restored with SFC restorations performed better without CC compared to the ones where SFC was covered. CLINICAL RELEVANCE In the case of fiber-reinforced direct restorations for MOD cavities in RCT molars, direct CC is recommended when utilizing long continuous fibers for reinforcement, however, should be avoided when only SFC is used for their reinforcement.
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Ranka S, Rao AS, Shah U, Solanki D, Pawar AM, Reda R, Zanza A, Testarelli L. Comparative Evaluation of Two Different Fiber-Reinforced Composite Materials in Class 1 Post-Endodontic Restorations in Molars-A Randomized Clinical Study. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7858. [PMID: 36363448 PMCID: PMC9658539 DOI: 10.3390/ma15217858] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/25/2022] [Accepted: 10/28/2022] [Indexed: 05/27/2023]
Abstract
This study aimed to evaluate and compare two different fiber-reinforced composite materials in class I post-endodontic restoration in molars. A total of 50 patients were randomly assigned into two groups (n = 25 for each group); group A: everX Posterior (packable composite) with a top layer of solareX (nano-hybrid composite) and group B: everX Flow (flowable composite) with a top layer of G-aenial universal injectable (flowable composite). Patients were evaluated immediately after the procedure (baseline), at 6 months, and at 1 year time intervals based on the modified USPHS criteria. The statistical analysis using a chi-square test showed no statistically significant difference in the clinical performance of group A and group B. Clinical performance of the combination of everX Flow with overlying G-aenial universal injectable composite proved to be comparable with everX Posterior with overlying solareX composite as post-endodontic restorations in class I lesions in permanent molars.
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Affiliation(s)
- Suwidhi Ranka
- Department of Conservative Dentistry and Endodontics, KM Shah Dental College & Hospital, Sumandeep Vidyapeeth, Vadodara 391760, India
| | - Ajay Singh Rao
- Department of Conservative Dentistry and Endodontics, KM Shah Dental College & Hospital, Sumandeep Vidyapeeth, Vadodara 391760, India
| | - Unnati Shah
- Department of Conservative Dentistry and Endodontics, KM Shah Dental College & Hospital, Sumandeep Vidyapeeth, Vadodara 391760, India
| | - Dikshit Solanki
- Department of Conservative Dentistry and Endodontics, KM Shah Dental College & Hospital, Sumandeep Vidyapeeth, Vadodara 391760, India
| | - Ajinkya M. Pawar
- Department of Conservative Dentistry and Endodontic, Nair Hospital Dental College, Mumbai 400034, India
| | - Rodolfo Reda
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
| | - Alessio Zanza
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
| | - Luca Testarelli
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
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Albar NHM, Khayat WF. Evaluation of Fracture Strength of Fiber-Reinforced Direct Composite Resin Restorations: An In Vitro Study. Polymers (Basel) 2022; 14:polym14204339. [PMID: 36297917 PMCID: PMC9611757 DOI: 10.3390/polym14204339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/03/2022] [Accepted: 10/11/2022] [Indexed: 11/18/2022] Open
Abstract
This in vitro study aimed to compare the fracture strength of direct non-reinforced class II composite resin restorations and polyethylene fiber-reinforced restorations, and also to investigate the influence of the locations of polyethylene fibers within the cavity on the fracture strength. Sixty freshly extracted human teeth were disinfected and prepared (class II cavity design). The teeth were assigned randomly into four groups (n = 13). Group I (control) was restored with nano-hybrid composite resin. The other three experimental groups were restored with the same composite resin material reinforced by polyethylene fibers (Ribbond) at different locations. Fibers were placed either on the axial wall (Group II), on the gingival floor (Group III), or on the axial wall and pulpal/gingival floor (Group IV) of the proximal cavity. All the teeth were subjected to thermocycling to simulate the oral environment. The fracture strength was measured using a universal testing machine. Group IV had the highest mean fracture strength at maximum load (148.74 MPa), followed by Group II (140.73 MPa), Group III (136.34 MPa), and Group I (130.08 MPa), with a statistically significant difference from the control group (p = 0.008) but not between groups II and III.
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Affiliation(s)
| | - Waad Fahmi Khayat
- Department of Restorative Dentistry, College of Dentistry, Umm Al-Qura University, Makkah 24381, Saudi Arabia
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Küçük Ö, Keçeci AD. Strengthening effect of different fiber placement designs on root canal treated and bleached premolars. Odontology 2020; 109:349-357. [PMID: 32894381 DOI: 10.1007/s10266-020-00549-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/20/2020] [Indexed: 10/23/2022]
Abstract
To evaluate the strengthening effect of five different fibers with different placement designs in root canal treated and intracoronally bleached premolars. Seventy extracted single-rooted premolars were distributed into 7 groups (G1-G7). Group 1 (G1) included the intact (I) teeth as the negative control. Group 2 (G2) included root canal treated, intra-coronally bleached and composite (C) restored teeth as the positive control. In the other five test groups after root canal treatment the teeth were intra-coronally bleached and fiber materials were placed into standard MOD cavities in the following different designs: an intracanal rigid fiber/Reforpost (G3,RF), an intracanal flexible fiber/ Everstick (G4, FF), four intracanal flexible pin fibers/Dentapreg Pin (G5,PF), an intercuspal flexible fiber /Dentapreg SFU (G6, IF) or an intra-coronal horseshoe-shaped/ Dentapreg SFU (G7,CF). All cavities were filled with a microfilled resin composite. Fracture resistance was tested using a universal testing machine under a crosshead speed of 1 mm/minute. One-way ANOVA and Duncan's Multiple Range tests were used for statistical analysis. Fracture types were recorded. The fracture resistance values in descending order were G1(I): 1190.97 N > G6 (IF): 1138.78 N > G5 (PF): 942.45 N > G3 (RF): 737.40 N > G4 (FF):694.29 N > G2 (C): 611.83 N > G7 (CF): 542.78 N. There were statistically significant differences among the groups (p ≤ 0.05). In all groups, repairable coronal oblique fractures were mostly observed. Flexible fibers placed intercuspally exhibited a significantly better strengthening effect than those of the intracanal flexible and rigid fibers (p < 0.05).
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Affiliation(s)
- Öznur Küçük
- Kütahya Oral and Dental Health Center, Kütahya, Turkey.
| | - Ayşe Diljin Keçeci
- Department of Endodontics, School of Dentistry, Suleyman Demirel University, Isparta, Turkey.
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12
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Almohaimede A, Almanie D, Alaathy S, Almadi E. Fracture Resistance of Roots Filled With Bio-Ceramic and Epoxy Resin-Based Sealers: In Vitro Study. Eur Endod J 2020; 5:134-137. [PMID: 32766524 PMCID: PMC7398996 DOI: 10.14744/eej.2019.33042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/22/2019] [Indexed: 11/23/2022] Open
Abstract
Objective This study aimed to assess the resistance of roots to fracture after being root canal filled with two types of endodontic sealers; bio-ceramic based sealer (TotalFill) and epoxy-resin based sealer (AH Plus). Methods Fifty-nine single canal mandibular premolars were instrumented. Group I (n=14, negative control): root canals were left without instrumentation and unfilled, group II (n=15, positive control): root canals were instrumented only and left unfilled, group III and IV (n=15 each): root canals were instrumented and filled with either gutta-percha/TotalFill or gutta-percha/AH Plus, respectively. The resistance of the roots to fracture was measured with a universal testing machine "Instron Corp" through recording the maximum force in Newton (N) needed to fracture each root. To analyze the data Kruskal-Wallis test was utilized, followed by Dunn's Bonferroni post hoc test for multiple comparisons. The level of significance was set at 0.05 (P≤0.05). Results TotalFill group showed slightly better fracture resistance (734.62 N) than AH Plus group (728.29 N). However, no statistical significant difference was found between the two groups (P>0.05). The greatest mean fracture force was shown in the negative control group (913.915 N) with statistical significant difference between the other three groups (P<0.05). Conclusion Gutta-percha/TotalFill and gutta-percha/AH Plus did not reinforce the root canal treated teeth.
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Affiliation(s)
- Amal Almohaimede
- From the Department of Restorative Dental Sciences, Endodontic Division, College of Dentistry, King Saud University, Riyadh, Saudi Arabia, Kingdom of Saudi Arabia
| | - Daniah Almanie
- From the Department of Restorative Dental Sciences, Endodontic Division, College of Dentistry, King Saud University, Riyadh, Saudi Arabia, Kingdom of Saudi Arabia
| | - Sara Alaathy
- From the Department of Restorative Dental Sciences, Endodontic Division, College of Dentistry, King Saud University, Riyadh, Saudi Arabia, Kingdom of Saudi Arabia
| | - Ebtissam Almadi
- From the Department of Restorative Dental Sciences, Endodontic Division, College of Dentistry, King Saud University, Riyadh, Saudi Arabia, Kingdom of Saudi Arabia
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İnce Yusufoglu S, Akman M, Akbulut MB, Eldeniz AÜ. Fracture resistance of roots enlarged with various rotary systems and obturated with different sealers. J Dent Res Dent Clin Dent Prospects 2019; 13:215-220. [PMID: 31857868 PMCID: PMC6904921 DOI: 10.15171/joddd.2019.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 10/28/2019] [Indexed: 11/09/2022] Open
Abstract
Background. This in vitro study compared the fracture resistance of roots instrumented either with ProTaper or One Shape rotary systems and filled with one of the silicate, epoxy resin or silicone-based sealers. Methods. Sixty single-rooted extracted mandibular premolars were decoronated to a length of 13 mm and then randomly divided into two main groups (n=30) in terms of the rotary system used for preparation. Group 1 samples were instrumented with the ProTaper Universal system up to a master apical file of #F2, while samples in group 2 were enlarged with One Shape system. The two main groups were then divided into 3 subgroups in terms of the sealer used (n=10) and filled with guttapercha (either F2 or MM-GP points) of the rotary system used and one of the sealers as follows: group 1, BioRoot RCS + ProTaper F2 gutta-percha; group 2, AH Plus + ProTaper F2 gutta-percha; group 3, GuttaFlow + ProTaper F2 gutta-percha; group 4, BioRoot RCS+ MM-GP points; group 5, AH Plus + MM-GP points; and group 6, GuttaFlow + MM-GP points. Each specimen then underwent fracture testing by using a universal testing machine at a crosshead speed of 1.0 mm/min until the root fractured. Data were statistically analyzed. Results. Two-way ANOVA showed no significant differences between the groups. One Shape instruments showed significantly better fracture resistance compared to ProTaper instruments. Statistically, no significant difference was found between AHPlus, GuttaFlow and BioRoot RCS sealers. Conclusion. It can be concluded that the rotary system used for the instrumentation of teeth has some influence on the fracture resistance, while the root canal sealers do not have such an effect.
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Affiliation(s)
- Selen İnce Yusufoglu
- Department of Endodontics, Faculty of Dentistry, Ankara Yıldırım Beyazıt University, Ankara, Turky
| | - Melek Akman
- Department of Endodontics, Faculty of Dentistry, Konya Necmettin Erbakan University, Konya, Turkey
| | - Makbule Bilge Akbulut
- Department of Endodontics, Faculty of Dentistry, Konya Necmettin Erbakan University, Konya, Turkey
| | - Ayce Ünverdi Eldeniz
- Department of Endodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey
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Gaintantzopoulou MD, Farmakis ET, Eliades GC. Effect of Load Cycling on the Fracture Strength/Mode of Teeth Restored with FRC Posts or a FRC Liner and a Resin Composite. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9054301. [PMID: 30186870 PMCID: PMC6112082 DOI: 10.1155/2018/9054301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/15/2018] [Indexed: 01/11/2023]
Abstract
The aim of the study was to comparatively evaluate the fracture strength and mode of root canal treated teeth restored with resin composites with and without posts. The lingual cusps of root canal treated first upper premolars (n = 10/group) were removed down to cervical enamel and restored with the following: group A: glass-fiber post (Glassix) followed by a particulate-filled composite resin (PFC, G-aenial posterior, 3 × 2 mm layers); group B: glass-fiber reinforced composite bulk fill liner (EverX posterior, 4 mm layer) with the PFC (2 mm layer). Specimens were immersed in H2O (1 w/37°C), then subjected to load cycling (50 N/0.2 Hz/200k cycles), and fractured under compressive loading. Failure mode was characterized by stereomicroscopy. Statistical analysis was performed by Mann-Whitney (load) and Chi-square (mode) at a = 0.05. No statistically significant differences (p = 0.273) were found in fracture load between median values of groups A (860 N) and B (1059 N). In group A, 60% of the specimens demonstrated catastrophic root fractures and 40% mixed crown fractures (tooth cusp and restoration), whereas in group B, no root fractures were found, and the failure modes were equally distributed between mixed fractures as above and fracture of the buccal cusp. These differences were statistically significant (p = 0.004). The combination of the glass-FRC bulk fill liner with the PFC diminished the catastrophic root fractures induced by FRC posts, at a similar or higher fracture load.
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Affiliation(s)
- Maria D. Gaintantzopoulou
- Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 11521 Athens, Greece
| | - Eleftherios T. Farmakis
- Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 11521 Athens, Greece
| | - George C. Eliades
- Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 11521 Athens, Greece
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15
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The Effects of Endodontic Access Cavity Preparation Design on the Fracture Strength of Endodontically Treated Teeth: Traditional Versus Conservative Preparation. J Endod 2018; 44:800-805. [DOI: 10.1016/j.joen.2018.01.020] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/23/2018] [Accepted: 01/31/2018] [Indexed: 11/18/2022]
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16
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Khan SIR, Ramachandran A, Alfadley A, Baskaradoss JK. Ex vivo fracture resistance of teeth restored with glass and fiber reinforced composite resin. J Mech Behav Biomed Mater 2018; 82:235-238. [PMID: 29627734 DOI: 10.1016/j.jmbbm.2018.03.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 03/26/2018] [Indexed: 11/24/2022]
Abstract
OBJECTIVES This study aims to compare the ex vivo fracture resistance of root canal treated (RCT) teeth restored with four different types of fibers under composite resin. SUBJECTS AND METHODS One hundred and forty extracted mandibular first molar teeth were assigned to seven groups (n = 20/group). Group 1 was the control group. In groups 2-7, endodontic access and standard Mesio-occluso-distal (MOD) cavities were prepared. Following RCT, group 2 was left unrestored. In group 3, flowable composite resin (FCR) was used to line the cavities and restored with composite resin. In groups 4,5,6 and 7, Ribbond, Everstick, Dentapreg and Bioctris fibers were inserted in flowable resin and restored respectively. RESULTS All the groups restored with fiber reinforced composite displayed higher fracture resistance than the group restored with only composite resin (p < 0.001). In addition, Groups restored with Everstick and Bioctris (Groups 5 and 7) showed higher fracture resistance when compared to Ribbond and Dentapreg (Groups 4 and 6). CONCLUSION E glass fibers demonstrated highest fracture resistance and hence can be preferred over other fiber types to reinforce RCT teeth with weakened crown structures.
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Affiliation(s)
- Sulthan Ibrahim Raja Khan
- Department of Restorative & Prosthetic dental sciences, College of Dentistry, King Saud Bin Abdulaziz University for health sciences, Kingdom of Saudi Arabia.
| | - Anupama Ramachandran
- Department of Conservative Dentistry & Endodontics, Chettinad Dental College & Research Institute, Tamil Nadu, India.
| | - Abdulmohsen Alfadley
- Department of Restorative & Prosthetic dental sciences, College of Dentistry, King Saud Bin Abdulaziz University for health sciences, Kingdom of Saudi Arabia.
| | - Jagan Kumar Baskaradoss
- Department of Developmental and Preventive Sciences, Faculty of Dentistry, Kuwait University, Kuwait.
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17
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Garlapati TG, Krithikadatta J, Natanasabapathy V. Fracture resistance of endodontically treated teeth restored with short fiber composite used as a core material—An in vitro study. J Prosthodont Res 2017; 61:464-470. [DOI: 10.1016/j.jpor.2017.02.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/26/2017] [Accepted: 02/15/2017] [Indexed: 10/20/2022]
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Natural Tooth Pontic: An Instant Esthetic Option for Periodontally Compromised Teeth-A Case Series. Case Rep Dent 2016; 2016:8502927. [PMID: 27994892 PMCID: PMC5138465 DOI: 10.1155/2016/8502927] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/30/2016] [Indexed: 11/18/2022] Open
Abstract
Sudden tooth loss in the esthetic zone of the maxillary or mandibular anterior region can be due to trauma, periodontal disease, or endodontic failure. The treatment options for replacing the missing tooth can vary between removable prosthesis, tooth-supported prosthesis, and implant-supported prosthesis. Irrespective of the final treatment, the first line of management would be to provisionally restore the patient's esthetic appearance at the earliest, while functionally stabilizing the compromised arch. Using the patient's own natural tooth as a pontic offers the benefits of being the right size, shape, and color and provides exact repositioning in its original intraoral three-dimensional position. Additionally, using the patient's platelet concentrate (platelet rich fibrin) facilitates early wound healing and preservation of alveolar ridge shape following tooth extraction. The abutment teeth can also be preserved with minimal or no preparation, thus keeping the technique reversible, and can be completed at the chair side thereby avoiding laboratory costs. This helps the patient better tolerate the effect of tooth loss psychologically. The article describes a successful, immediate, and viable technique for rehabilitation of three different patients requiring replacement of a single periodontally compromised tooth in an esthetic region.
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19
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Gürel MA, Helvacioğlu Kivanç B, Ekıcı A, Alaçam T. Fracture Resistance of Premolars Restored Either with Short Fiber or Polyethylene Woven Fiber-Reinforced Composite. J ESTHET RESTOR DENT 2016; 28:412-418. [DOI: 10.1111/jerd.12241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mügem Asli Gürel
- Faculty of Dentistry, Department of Endodontics; Gazi University; Ankara Turkey
| | | | - Adil Ekıcı
- Faculty of Dentistry, Department of Endodontics; Gazi University; Ankara Turkey
| | - Tayfun Alaçam
- Faculty of Dentistry, Department of Endodontics; Gazi University; Ankara Turkey
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20
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Bansal R, Chowdhary P, Gurtu A, Mehrotra N, Kishore A. Splinting of Longitudinal Fracture: An Innovative Approach. Case Rep Dent 2016; 2016:5083874. [PMID: 27247808 PMCID: PMC4876209 DOI: 10.1155/2016/5083874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/25/2016] [Accepted: 04/18/2016] [Indexed: 11/29/2022] Open
Abstract
Trauma may result in craze lines on the enamel surface, one or more fractured cusps of posterior teeth, cracked tooth syndrome, splitting of posterior teeth, and vertical fracture of root. Out of these, management of some fractures is of great challenge and such teeth are generally recommended for extraction. Literature search reveals attempts to manage such fractures by full cast crown, orthodontic wires, and so forth, in which consideration was given to extracoronal splinting only. However, due to advancement in materials and technologies, intracoronal splinting can be achieved as well. In this case report, longitudinal fractures in tooth #27, tooth #37, and tooth #46 had occurred. In #27, fracture line was running mesiodistally involving the pulpal floor resulting in a split tooth. In teeth 37 and 46, fractures of the mesiobuccal cusp and mesiolingual cusp were observed, respectively. They were restored with cast gold inlay and full cast crown, respectively. Longitudinal fracture of 27 was treated with an innovative approach using intracanal reinforced composite with Ribbond, external reinforcement with an orthodontic band, and full cast metal crown to splint the split tooth.
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Affiliation(s)
- Rashmi Bansal
- Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Bareilly 243006, India
| | - Priyanka Chowdhary
- Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Bareilly 243006, India
| | - Anuraag Gurtu
- Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Bareilly 243006, India
| | - Nakul Mehrotra
- Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Bareilly 243006, India
| | - Abhinav Kishore
- Department of Conservative Dentistry & Endodontics, Institute of Dental Sciences, Bareilly 243006, India
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21
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Hegde V, Arora S. Fracture resistance of roots obturated with novel hydrophilic obturation systems. J Conserv Dent 2015; 18:261-4. [PMID: 26069417 PMCID: PMC4450537 DOI: 10.4103/0972-0707.154047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/12/2015] [Accepted: 02/17/2015] [Indexed: 01/22/2023] Open
Abstract
Aim: Comparative assessment of fracture resistance of roots obturated with three hydrophilic systems — novel CPoint system, Resilon/Epiphany system, and EndoSequence BC sealer; and one hydrophobic gold standard gutta-percha/AHPlus system. Materials and Methods: Ninety freshly extracted, human, single-rooted mandibular premolars were selected. The specimens were decoronated and standardized to a working length of 13 mm. The teeth were randomly divided into six groups (n = 15). In Group A, teeth were left unprepared and unfilled (negative control). Rest of the groups were prepared by using ProTaper system up to a master apical file F3; followed by which Group B was left unobturated (positive control); Group C, novel CPoint System; group D, Resilon/Epiphany system, Group E EndoSequence BC sealer, and Group F gutta-percha and AH Plus. Specimens were stored for 2 weeks at 100% humidity. Each group was then subjected to fracture testing by using a universal testing machine. The force required to fracture each specimen was recorded and the data was analyzed statistically using analysis of variance (ANOVA) test and Tukey's post-hoc test. Results: The hydrophilic obturation systems have shown to exhibit significantly higher fracture resistance as shown by the values in Groups C, D, and E (P < 0.05) when compared with Group F. Within hydrophilic groups there was significant difference between Group D and Groups C and E (P < 0.05), while Groups C and E had no significant difference (P > 0.05). Conclusion: In contrast to hydrophobic systems, hydrophilic systems showed higher fracture resistance in a single-rooted premolar.
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Affiliation(s)
- Vibha Hegde
- Deptarment of Conservative and Endodontic, Yerala Medical Trust Dental College and Hospital, Kharghar, Navi Mumbai, Maharashtra, India
| | - Shashank Arora
- Deptarment of Conservative and Endodontic, Yerala Medical Trust Dental College and Hospital, Kharghar, Navi Mumbai, Maharashtra, India
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22
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KEMALOGLU H, EMIN KAVAL M, TURKUN M, MICOOGULLARI KURT S. Effect of novel restoration techniques on the fracture resistance of teeth treated endodontically: An in vitro study. Dent Mater J 2015; 34:618-22. [DOI: 10.4012/dmj.2014-326] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hande KEMALOGLU
- Ege University, Faculty of Dentistry, Department of Restorative Dentistry
| | | | - Murat TURKUN
- Ege University, Faculty of Dentistry, Department of Restorative Dentistry
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23
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Magne P, Carvalho AO, Bruzi G, Anderson RE, Maia HP, Giannini M. Influence of No-Ferrule and No-Post Buildup Design on the Fatigue Resistance of Endodontically Treated Molars Restored With Resin Nanoceramic CAD/CAM Crowns. Oper Dent 2014; 39:595-602. [DOI: 10.2341/13-004-l] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives
To evaluate the influence of adhesive core buildup designs—4-mm buildup, 2-mm buildup, and no buildup (endocrown)—on the fatigue resistance and failure mode of endodontically treated molar teeth restored with resin nanoceramic (RNC) CAD/CAM complete crowns placed with self-adhesive resin cement.
Methods and Materials
Forty-five extracted molars were decoronated at the level of the cementoenamel junction, and the roots were endodontically treated. Specimens received different Filtek Z100 adhesive core buildups (4-mm buildup, 2-mm buildup, and no buildup, endocrown preparation) and were restored with Cerec 3 CAD/CAM RNC crowns (Lava Ultimate). Restorations (n=15) and prepared teeth were treated with airborne-particle abrasion, followed by cementation with RelyX Unicem 2 Automix. Specimens were then subjected to cyclic isometric loading at 10 Hz, beginning with a load of 200 N (for 5000 cycles), followed by stages of 400, 600, 800, 1000, 1200, and 1400 N at a maximum of 30,000 cycles each. Specimens were loaded until failure or to a maximum of 185,000 cycles (10-mm-diameter composite resin sphere antagonist). The failure mode was assessed: “catastrophic” (tooth/root fracture that would require tooth extraction), “possibly reparable” (cohesive/adhesive failure with fragment and minor damage, chip or crack, of underlying tooth structure), or “reparable” fracture (cohesive or cohesive/adhesive fracture of restoration only). Groups were compared using the life table survival analysis. Intact specimens were loaded to failure and compared with one-way analysis of variance.
Results
All specimens survived the fatigue test until the 800 N-step. The survival rates for 4-mm, 2-mm, and no buildup (endocrown) were 53%, 87%, and 87%, respectively, and were not statistically different even though crowns with 2-mm buildups only started to fail at 1200 N. Minor cohesive chips were detected in many samples despite having survived all 185,000 cycles. Postfatigue load-to-failure ranged from 2969 N with 4-mm buildup (eight specimens), 2794 N for 2-mm buildup (13 specimens), and 2606 N for endocrowns (13 specimens) and were also not statistically different. There were only two catastrophic failures during the fatigue test and small subgingival delamination fractures and cracks (only with 4-mm buildup). All specimens in the load-to-failure test exhibited nonrestorable catastrophic fractures.
Conclusions
There was no influence of the buildup design on the performance of endodontically treated molars restored with RNC CAD/CAM complete crowns placed with self-adhesive cement. All restoration designs survived the normal range of masticatory forces. Failure mode tended to be more favorable with the 2-mm buildup or no buildup (endocrown).
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Affiliation(s)
- P Magne
- Pascal Magne, PhD, University of Southern California, Restorative Sciences, Los Angeles, CA, USA
| | - AO Carvalho
- Adriana Oliveira Carvalho, PhD, Piracicaba Dental School/State University of Campinas, Department of Restorative Dentistry, Salvador, Bahia, Brazil
| | - G Bruzi
- Greciana Bruzi, MSc, Universidade Federal de Santa Catarina, Odontology, Federal University of Santa Catarina (UFSC), Department of Odontology, Santa Catarina, Brazil
| | - RE Anderson
- Robert E Anderson, DMD, University of Southern California, Graduate Endodontics Department, Los Angeles, CA, USA
| | - HP Maia
- Hamilton Pires Maia, PhD, Universidade Federal de Santa Catarina, Operative Dentistry, Department of Odontology, Santa Catarina, Brazil
| | - M Giannini
- Marcelo Giannini, DDS, MS, PhD, associate professor, Piracicaba Dental School, University of Campinas, Department of Restorative Dentistry, Piracicaba, Brazil
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24
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Shouha P, Swain M, Ellakwa A. The effect of fiber aspect ratio and volume loading on the flexural properties of flowable dental composite. Dent Mater 2014; 30:1234-44. [DOI: 10.1016/j.dental.2014.08.363] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 04/02/2014] [Accepted: 08/08/2014] [Indexed: 10/24/2022]
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25
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Topçuoğlu HS, Tuncay Ö, Karataş E, Arslan H, Yeter K. In vitro fracture resistance of roots obturated with epoxy resin-based, mineral trioxide aggregate-based, and bioceramic root canal sealers. J Endod 2013; 39:1630-3. [PMID: 24238462 DOI: 10.1016/j.joen.2013.07.034] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 07/24/2013] [Accepted: 07/29/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the fracture resistance of teeth filled with 3 different endodontic sealers. METHODS Seventy-five single-rooted extracted mandibular premolars were decoronated to a length of 13 mm. The teeth were randomly divided into 5 groups (n = 15 for each group). In group 1, the teeth were left unprepared and unfilled (negative control), and in group 2, the teeth were left unobturated (positive control). The rest of the roots were prepared by using the ProTaper System up to a master apical file size of F3: group 3, bioceramic sealer (Endosequence BC sealer) + gutta-percha; group 4, mineral trioxide aggregate-based sealer (Tech Biosealer Endo) + gutta-percha; and group 5, epoxy resin-based sealer (AH Plus Jet) + gutta-percha. All root specimens were stored for 2 weeks at 100% humidity to allow the complete setting of the sealers. Each specimen was then subjected to fracture testing by using a universal testing machine at a crosshead speed of 1.0 mm/min(-1) until the root fractured. The force required to fracture each specimen was recorded, and the data were analyzed statistically. RESULTS The fracture values of groups 3 and 5 were significantly higher than those of group 4 (P < .05). There was no significant difference between groups 3 and 5 (P > .05). CONCLUSIONS In contrast to Tech Biosealer Endo, Endosequence BC and AH Plus Jet sealer increased the force to fracture in root-filled single-rooted premolar teeth.
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26
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How can stress be controlled in endodontically treated teeth? A 3D finite element analysis. ScientificWorldJournal 2013; 2013:426134. [PMID: 23956694 PMCID: PMC3730192 DOI: 10.1155/2013/426134] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 06/29/2013] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to analyze the stresses that develop by oblique and vertical forces in endodontically treated maxillary second premolars that were restored with resin composite. Additionally, in our study the effects of the different restorative approaches and use of different base materials on stress formation were analyzed using three-dimensional finite element stress analysis. For restoration, the models representing both cusp capping, palatinal cusp capping, standard MOD restoration, and use of woven fiber in occlusal part were prepared. In all models, oblique forces caused more stress than did vertical forces. Materials with low elastic moduli cause high amounts of stress, whereas materials with elastic moduli similar to that of dental tissues cause low amounts of stress. Additional approaches such as cusp capping, functional cusp capping, and woven fiber use do not affect stress formation on the tooth after endodontic treatment.
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Jafari Navimipour E, Ebrahimi Chaharom ME, Alizadeh Oskoee P, Mohammadi N, Bahari M, Firouzmandi M. Fracture Resistance of Endodontically-treated Maxillary Premolars Restored with Composite Resin along with Glass Fiber Insertion in Different Positions. J Dent Res Dent Clin Dent Prospects 2013; 6:125-30. [PMID: 23277858 PMCID: PMC3529925 DOI: 10.5681/joddd.2012.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Accepted: 09/03/2012] [Indexed: 01/21/2023] Open
Abstract
Background and aims The aim was to evaluate the effect of three methods of fiber insertion on fracture resistance of root-filled maxillary premolars in vitro.
Materials and methods Sixty extracted human maxillary premolars received endodontic treatment followed by preparation of mesioocclusodistal (MOD) cavities, with gingival cavosurface margin 1.5 mm coronal to the cementoenamel junction (CEJ). Subsequently, the samples were randomly divided into four groups: no-fiber group; occlusal fiber group (fiber was placed in the occlusal third); circumferential fiber group (fiber was placed circumferentially in the cervical third); and dual-fiber group (occlusal and circumferential fibers). Subsequent to restoring with composite resin and thermocycling, a compressive force was applied until fracture. Data was analyzed using one-way ANOVA and Tukey test at significance levels of P < 0.05 and P < 0.02, respectively.
Results Fiber placement significantly increased fracture resistance. Fracture resistance in the dual-fiber group was significantly higher than that in the circumferential fiber group (P < 0.007); however, there were no significant differences between the dual-fiber and occlusal fiber groups (P = 0.706). The highest favorable fracture rate was observed in the circumferential fiber group (60%).
Conclusion Composite resin restoration along with glass fiber in the occlusal and gingival thirds can be an acceptable treatment option for restoring root-filled upper premolars.
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Affiliation(s)
- Elmira Jafari Navimipour
- Associate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Ashraf H, Momeni G, Moradi Majd N, Homayouni H. Fracture Resistance of Root Canals Obturated with Gutta-Percha versus Resilon with Two Different Techniques. IRANIAN ENDODONTIC JOURNAL 2013; 8:136-9. [PMID: 23922576 PMCID: PMC3734517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 06/02/2013] [Accepted: 06/27/2013] [Indexed: 11/23/2022]
Abstract
INTRODUCTION Dentin removal during root canal instrumentation creates a weaker root structure and increases its potential to fracture. The aim of this in vitro experimental study was to compare fracture resistance of teeth filled with gutta-percha, and Resilon using two different techniques. MATERIALS AND METHODS This study was performed on 105 single-canal extracted maxillary incisors. Samples were divided into seven groups of 15 each. Three groups were prepared with K-files; three groups with Race rotary files and in one group no preparation was carried out. Of all samples prepared either manually or with rotary instruments, 15 teeth were obturated using gutta-percha and AH26 sealer, 15 teeth were filled with Resilon and 15 teeth remained unfilled. Loading force to fracture was measured and ANOVA and Tukey tests were used for statistical analysis. RESULTS No statistically significant differences were observed between different preparation techniques. The intact roots showed significantly greater fracture resistance compared to both instrumented groups (P<0.01). Resilon Group showed significantly higher resistance than gutta-percha Group (P<0.01); however the difference between Resilon and intact teeth was not statistically significant. CONCLUSION Accoding to the results of this in vitro study, root canal filling using Resilon may increase the fracture resistance of treated teeth.
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Affiliation(s)
- Hengameh Ashraf
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Golnaz Momeni
- Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nima Moradi Majd
- Department of Endodontics, Dental Carries Research Center, Dental School, Qazvin University of Medical,Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Corresponding author: Nima Moradi Majd, Dental Carries Research Center, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran. Tel: +98-2813353061-2, Fax: +98-281 3353066, E-mail:
| | - Hamed Homayouni
- Department of Endodontics, Dental Carries Research Center, Dental School, Qazvin University of Medical
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An innovative approach for management of vertical coronal fracture in molar: case report. Case Rep Dent 2012; 2012:327812. [PMID: 22567453 PMCID: PMC3335583 DOI: 10.1155/2012/327812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Accepted: 11/17/2011] [Indexed: 11/17/2022] Open
Abstract
Unlike anterior teeth, acute exogenous trauma is an infrequent cause of posterior coronal vertical tooth fractures. Endodontic and restorative management of such fractures is a great challenge for the clinician. Newer advancements in adhesive techniques can provide successful intracoronal splinting of such teeth to reinforce the remaining tooth structure. This paper describes the diagnosis and management of a case of complicated vertical coronal fracture in mandibular first molar induced by a traffic accident.
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Bhargava S, Namdev R, Dutta S, Tiwari R. Immediate fixed temporization with a natural tooth crown pontic following failure of replantation. Contemp Clin Dent 2011; 2:226-9. [PMID: 22090769 PMCID: PMC3214533 DOI: 10.4103/0976-237x.86468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Extracted teeth can be bonded directly to adjacent teeth utilizing a prefabricated composite resin framework reinforced with polyethylene fiber as a noninvasive long-term provisional tooth replacement. This immediate provisional restoration allow for exact repositioning of the coronal part of the extracted tooth in its original intraoral three-dimensional position and thus relieves the apprehension of the patient caused by the sudden loss of an anterior tooth.
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Affiliation(s)
- Smriti Bhargava
- Department of Pedodontics, Government Dental College, Rohtak, India
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MAGNE PASCAL, BOFF LUÍSL, ODERICH ELISA, CARDOSO ANTÔNIOC. Computer-Aided-Design/Computer-Assisted-Manufactured Adhesive Restoration of Molars with a Compromised Cusp: Effect of Fiber-Reinforced Immediate Dentin Sealing and Cusp Overlap on Fatigue Strength. J ESTHET RESTOR DENT 2011; 24:135-46. [DOI: 10.1111/j.1708-8240.2011.00433.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ozcopur B, Akman S, Eskitascioglu G, Belli S. The effect of different posts on fracture strength of roots with vertical fracture and re-attached fragments. J Oral Rehabil 2010; 37:615-23. [PMID: 20406354 DOI: 10.1111/j.1365-2842.2010.02086.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aim of this in vitro study was to test the effect of different post systems on fracture strength of roots with re-attached fragments. Root canals of eighty extracted single-rooted human teeth were instrumented (ProFile) and randomly divided into two groups. The roots in the first group were vertically cracked, and the fragments were re-attached using Super Bond C&B (Sun Medical, Tokya, Japan). The roots in the second group were kept sound. Obturation of the roots was performed with MetaSEAL (Sun Medical) and gutta-percha. Post spaces were prepared, and the roots were restored with one of the followings: UniCore (Ultradent), Everstick (Stick Tech), Ribbond (Ribbond), ParaPost (Coltene/Whaledent) (n = 10). Four mm high build-ups were created (Clearfil DC Bond Core; Kuraray, Tokyo, Japan). Compressive loading of the samples was performed after 24 h (1 mm min(-1)). Mean load necessary to fracture each sample was recorded (Newton) and statistically analysed (One-way anova, t-tests). ParaPost showed the highest fracture strength among the roots with re-attached fragments (P < 0.05). UniCore and ParaPost systems showed similar fracture strength in the sound roots (P > 0.05). Re-attached fragments significantly reduced the fracture strength of roots in UniCore group (P = 0.000). Ribbond post showed mostly repairable fractures. Metal post (ParaPost) showed the highest fracture strength in the roots with re-attached fragments; however, fracture pattern was 41% non-repairable. Re-attached fragments significantly reduced the fracture strength of the roots in UniCore group. Prefabricated posts showed similar fracture strength in the sound roots. Customized post systems EverStick and Ribbond showed mostly repairable failure after loading in sound roots or roots with re-attached fragments.
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Affiliation(s)
- B Ozcopur
- Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, Yüzüncüyil University, Van, Turkey
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Eraslan Ö, Eraslan O, Eskitaşcıoğlu G, Belli S. Conservative restoration of severely damaged endodontically treated premolar teeth: a FEM study. Clin Oral Investig 2010; 15:403-8. [PMID: 20238232 DOI: 10.1007/s00784-010-0397-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 02/17/2010] [Indexed: 10/19/2022]
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Cobankara FK, Unlu N, Cetin AR, Ozkan HB. The effect of different restoration techniques on the fracture resistance of endodontically-treated molars. Oper Dent 2008; 33:526-33. [PMID: 18833859 DOI: 10.2341/07-132] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM This study compared the fracture resistance of endodontically-treated mandibular molars with mesio-occluso-distal (MOD) cavities restored using different restoration techniques. METHODOLOGY Sixty sound extracted mandibular molars were randomly assigned to six groups (n=10). Group 1 did not receive any preparation. The teeth in Groups 2-6 received root canal treatment and a MOD cavity preparation. The teeth in Group 2 were kept unrestored. Group 3 was restored conventionally with amalgam. Group 4 was restored with a dentin bonding system (DBS, Clearfil SE Bond) and resin composite (CR) (Clearfil Photoposterior). Group 5 was restored with indirect hybrid ceramic inlay material (Estenia). In Group 6, polyethylene ribbon fiber (Ribbond) was inserted into cavities in a buccal-to-lingual direction and the teeth were then restored with DBS and CR. After finishing and polishing, the specimens, except for Group 2, were loaded to failure by a chewing simulation device (60,000 cycles x 50 N load, 1.3 Hz frequency) in an artificial environment at 37 degrees C. Each tooth was subjected to compressive loading perpendicular to the occlusal surface at a crosshead speed of 1 mm/minute. The mean loads necessary to fracture were recorded in Newtons and the results were statistically analyzed. RESULTS The mean fracture values were as follows: Group 1: 2485.3 +/- 193.98a, Group 2: 533.9 +/- 59.4a, Group 3: 1705.8 +/- 135.7a, Group 4: 2033.3 +/- 137.6cd, Group 5: 2121.3 +/- 156.5d, Group 6: 1908.9 +/- 132.2cd. There were statistically significant differences between the groups annotated with different letters. Thus, Group 1 (intact teeth) had the greatest fracture resistance and Group 2 (non-restored teeth) the poorest. No statistically significant differences were found between Groups 3 (amalgam), 4 (resin composite) and 6 (polyethylene ribbon fiber reinforced composite) (p > 0.05). Group 5 (indirect hybrid ceramic inlay) had greater fracture resistance than Group 3 (p < 0.05). CONCLUSIONS Within the limitations of this study, although all of the restoration groups were stronger than the prepared-only group, none of the restoration techniques tested was able to completely restore the fracture resistance lost from MOD cavity preparation. However, use of indirect hybrid inlay restorations in these teeth may be recommended, because this restoration technique indicated more favorable fracture failure modes than other restoration techniques used in this study and particularly greater fracture strength than amalgam restorations. The promising result of indirect hybrid inlay restorations may need to be confirmed by long-term clinical studies.
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Affiliation(s)
- Funda Kont Cobankara
- Department of Endodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey.
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Deliperi S. Direct fiber-reinforced composite restoration in an endodontically-treated molar: a three-year case report. Oper Dent 2008; 33:209-14. [PMID: 18435197 DOI: 10.2341/07-99] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The reconstruction of structurally compromised non-vital posterior teeth may represent one of the most challenging adhesive-based restorative procedures. Several factors may influence the longevity of direct fiber-reinforced resin composite restorations: endodontic procedures prior to post cementation, dentin and/or post surface treatments, selection of the appropriate post design and architecture, resin composite polymerization and layering techniques. Thus, different specialties, such as endodontics and restorative dentistry, should work as a team to improve the longevity of restorations. This article presents three-year clinical results following reconstruction of a severely damaged endodontically-treated molar using direct fiber reinforced resin composite systems.
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Affiliation(s)
- Simone Deliperi
- Tufts University School of Dental Medicine, Boston, MA, USA.
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CEKIC-NAGAS I, ERGUN G, TEZVERGIL A, VALLITTU PK, LASSILA LV. Effect of fiber-reinforced composite at the interface on bonding of resin core system to dentin. Dent Mater J 2008; 27:736-43. [DOI: 10.4012/dmj.27.736] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ulusoy OIA, Genç O, Arslan S, Alaçam T, Görgül G. Fracture resistance of roots obturated with three different materials. ACTA ACUST UNITED AC 2007; 104:705-8. [PMID: 17714964 DOI: 10.1016/j.tripleo.2007.07.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2007] [Revised: 06/27/2007] [Accepted: 07/10/2007] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The aim of this study was to compare the fracture resistance of roots obturated with different materials. STUDY DESIGN Sixty root canals were instrumented and divided into 4 equal groups (n = 15 each). The root canals in group 1 were filled with AH26 sealer and gutta-percha, in group 2 with Resilon and Epiphany, and in group 3 with Ketac-Endo Aplicap and gutta-percha. Fifteen root canals had no obturation. The force required to fracture was recorded. The data was analyzed with analysis of variance and Duncan test. RESULTS The mean force of fracture for group 1 was significantly higher than for the other 3 groups (P < .05). There was significant difference between group 2 and group 3 (P < .05). Group 2 and group 3 were not significantly different from the control group (P > .05). CONCLUSION The use of AH26 + gutta-percha increased the fracture resistance of instrumented root canals compared with Resilon + Epiphany and Ketac-Endo Aplicap + gutta-percha.
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Affiliation(s)
- Ozgür Ilke Atasoy Ulusoy
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
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Cekic I, Ergun G, Uctasli S, Lassila LVJ. In vitro evaluation of push-out bond strength of direct ceramic inlays to tooth surface with fiber-reinforced composite at the interface. J Prosthet Dent 2007; 97:271-8. [PMID: 17547945 DOI: 10.1016/j.prosdent.2007.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM Failure of a restoration, where a part of a ceramic inlay and/or a cusp is fractured, is a common clinical problem. The application of fiber-reinforced composites at the tooth-inlay interface may prevent undesirable fractures in dental restorations. There is little information regarding the effect of a fiber- reinforced composite layer on the push-out bond strength of ceramic inlays to tooth structure. PURPOSE The purpose of this study was to compare push-out bond strengths of ceramic inlays to tooth structure using a layer of fiber weave-reinforced composite at the tooth interface with different adhesive systems. MATERIAL AND METHODS Forty standardized occlusal, conically-shaped cavities, 5 mm in occlusal diameter, 3.5 mm in cervical diameter and 3.5 mm deep, were prepared in extracted human molars using a truncated cone-shaped diamond rotary cutting instrument, the dimensions of which corresponded with those of prefabricated ceramic inlays. The teeth were divided into 2 groups according to the adhesive system used. Solobond Plus was used as a total-etching system and Futurabond NR as a self-etching system. Preetched and silanized ceramic inlays were bonded to tooth structure with or without a layer of bidirectional fiber weave (StickTech). The groups without fiber-reinforced composite layer served as controls. The inlays were cemented with dual-polymerizing luting composite (Bifix QM) and light polymerized for 40 seconds from the buccal, lingual, and occlusal surfaces. Specimens were thermal cycled (6000 x 5 degrees -55 degrees C) and 3.5-mm-thick discs were prepared for the push-out test. The discs (n=10) were tested in a universal testing machine and pushed out with a cross-head speed of 1.0 mm/min. The data were analyzed with analysis of variance (ANOVA) (alpha=.05). Failure modes were analyzed using a stereomicroscope and SEM. RESULTS Push-out mean bond strength (SD) values in MPa of direct ceramic inlays were: Solobond Plus (control): 9.7 (3.9), Solobond Plus with fiber-reinforced composite: 10.5 (5.0), Futurabond NR (control): 8.4 (2.5), Futurabond NR with fiber-reinforced composite: 8.6 (2.2). The differences between groups were not significant for either adhesive system or with the use of fiber-reinforced composite layer at the interface. Mixed failures were observed in the control groups, whereas in the fiber-reinforced composite layer groups, failures were mostly cohesive within the fiber layer. No cohesive fracture of the tooth was observed when a layer of fiber weave was placed at the interface. CONCLUSION Within the limitations of this in vitro study, a fiber-reinforced composite layer at the bonding interface of ceramic inlay did not influence the push-out bond strength. Futurabond NR self-etching system and Solobond Plus total-etching system demonstrated similar push-out bond strengths.
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Affiliation(s)
- Isil Cekic
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
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