Comparative Evaluation of Fracture Resistance under Static and Fatigue Loading of Endodontically Treated Teeth Restored with Carbon Fiber Posts, Glass Fiber Posts, and an Experimental Dentin Post System: An In Vitro Study

Khetarpal, Ambica; Kavitha, Mahendran; Talwar, Sangeeta; Verma, Mahesh; Padmini, Govindaswamy; Ravishankar, Periasamy

doi:10.1016/j.joen.2012.07.003

Cited by 77 publications

(71 citation statements)

References 31 publications

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“…Therefore, biomechanical tests that simulate the oral environment by reproduction of the chewing forces, temperature and humidity of the oral cavity are important in evaluating the performance of new materials (8). Fatigue testing meets these requirements and is used for testing dental materials like composite resins and ceramics (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). The fatigue test simulates the clinical situation better than static compression test (11).…”

Section: Discussionmentioning

confidence: 99%

“…Literature reports have shown that materials that exhibit high initial resistance do not always have high resistance to fatigue (5,6). Therefore, it seems appropriate that the strength of teeth restored with dental materials should be measured using a dynamic mechanical test rather than static tests (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24).…”

Section: Introductionmentioning

confidence: 99%

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In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

et al. 2016

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The aim of this study was to compare the fatigue resistance of restored teeth with bulk fill composite resin, conventional composite resin with incremental insertion and unprepared sound teeth. Twenty-eight extracted maxillary premolars were selected and divided into 4 groups based on composite resin and insertion technique: control (C), conventional composite resin with incremental insertion (I) and bulk fill composite resin with three (BF3) or single increment (BF1). The restored specimens were submitted to fatigue resistance test with a 5 Hz frequency. An initial application of 5,000 sinusoidal load cycles with a minimum force of 50 N and a maximum force of 200 N was used. Next, were applied stages of 30,000 load cycles with the maximum force increasing gradually: 400, 600, 800, 1000, 1200 and 1400 N. The test was concluded when 185,000 load cycles were achieved or the specimen failed. The fatigue resistance data were recorded for comparison, using the Kaplan-Meier survival curve and analyzed by log-rank test at 0.05 significance. Fractures were classified based on the position of the failure - above or below the cementoenamel junction (CEJ). Statistical analysis of the Kaplan-Meier survival curve and log-rank test showed a significant difference between groups (p=0.001). The fracture analysis demonstrated that only 28.58% of failures were below the CEJ in group C, while for groups I, BF1 and BF3 they were 42.85%, 85.71% and 85.71%, respectively. Teeth restored with composite bulk fill in both techniques present similar fatigue resistance values compared with those restored with a conventional incremental insertion of composite, while the fatigue strength values of unprepared sound teeth were higher. Furthermore, unprepared sound teeth showed a lower percentage of fractures below the CEJ.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

et al. 2016

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“…Composite resin reduces stress concentrations at the interfaces, distributing forces in a more uniform manner, minimizing irreparable fractures (17), which improve the prognosis of post-retained restorations (19).…”

Section: Discussionmentioning

confidence: 99%

“…Although those findings are relevant, further studies are required to simulate the clinical scenario of dynamic loading (19). In this sense, in vitro fatigue simulation is an important tool for evaluation of restorative materials and techniques.…”

Section: Introductionmentioning

confidence: 99%

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

et al. 2016

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This study evaluated the fracture strength of endodontically treated teeth submitted to reconstructive techniques through dynamic and static tests. Forty human anterior teeth were divided into 4 groups (n=10): GNW (non-weakened) -root restored with glass fiber post (GFP), GW -weakened root restored with GFP, GDA -weakened root restored with direct anatomic GFP, and GIA -weakened root restored with indirect anatomic GFP. The teeth were endodontically treated considering that experimental groups (GW, GDA and GIA) simulated weakened roots for restoration with GFP using different techniques. The GFP was luted with resin cement and the coronal portion was restored with composite resin and metallic crowns. All samples were submitted to chewing simulation at 60 cycles/ min in a total of 300,000 cycles. The survival samples were further exposed to compressive loading at a crosshead speed of 1.0 mm/min in a universal testing machine. The load was applied at 135° to the long axis of the tooth until failure. Data were analyzed by ANOVA (α=0.05). After chewing simulation were observed: GNW: 100% of survival roots; GW: 70% of survival roots, and GDA and GIA: 80% of survival roots. The mean fracture strength values (N) were 280.6 (GNW), 239.0 (GW), 221.3 (GDA), and 234.1 (GIA) without significant difference among the groups (p=0.7476). The results suggested similar fracture strength in both weakened and non-weakened teeth regardless the reconstructive technique of root internal wall. Higher incidence of catastrophic fracture was observed in weakened teeth without restoration of the root internal wall.

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“…Therefore, studies have been performed to develop a restorative material with physical and mechanical properties similar to dentin for rehabilitation of endodontically treated teeth (2).…”

Section: Introductionmentioning

confidence: 99%

Stress Distribution in Roots Restored with Fiber Posts and An Experimental Dentin Post: 3D-FEA

et al. 2016

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The aim of this study was to compare the stress distribution in radicular dentin of a maxillary canine restored with either a glass fiber post, carbon fiber post or an experimental dentin post using finite element analysis (3D-FEA). Three 3D virtual models of a maxillary canine restored with a metal-ceramic crown and glass fiber post (GFP), carbon fiber post (CFP), and experimental dentin post (DP) were obtained based on micro-CT images. A total of 180 N was applied on the lingual surface of the incisal third of each tooth at 45 degrees. The models were supported by the periodontal ligament fixed in three axes (x=y=z=0). The von Mises stress (VMS) of radicular dentin and the intracanal posts was calculated. The structures of all groups showed similar values (MPa) and distribution of maximum von Mises stress. Higher stress was found in the apical third of dentin while the posts presented homogeneous stress distribution along the axis. The fiber and dentin posts exhibited similar stress values and distribution. Thus, the experimental dentin post is a promising restorative material. S t r e s s D i s t r i b u t i o n i n R o o t s

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Comparative Evaluation of Fracture Resistance under Static and Fatigue Loading of Endodontically Treated Teeth Restored with Carbon Fiber Posts, Glass Fiber Posts, and an Experimental Dentin Post System: An In Vitro Study

Cited by 77 publications

References 31 publications

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

In Vitro Fatigue Resistance of Teeth Restored With Bulk Fill versus Conventional Composite Resin

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

Stress Distribution in Roots Restored with Fiber Posts and An Experimental Dentin Post: 3D-FEA

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