Influence of Different Restoration Techniques on Fracture Resistance of Root-filled Teeth: In Vitro Investigation

Hshad, ME; Dalkilic, EE; Ozturk, GC; Doğruer, Işıl; Koray, Fatma

doi:10.2341/17-040-l

Cited by 16 publications

(20 citation statements)

References 25 publications

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“…According to previous studies, FEA models correlated very well with the observed fracture pattern in fracture strength tests, demonstrating reliable predictability for VRF [2324]. In the present study, a mandibular premolar tooth model was used, as mandibular premolars have been reported to be susceptible to fracture [25] and have been commonly used for fracture strength analysis in previous studies [78].…”

Section: Discussionsupporting

confidence: 53%

“…To date, many studies have evaluated the effects of various treatment protocols and applications, including root canal obturation with different filling materials and the application of different post-endodontic restorations, on the fracture strength of endodontically treated teeth [78]. However, divergent conclusions have been reported regarding the effect of such procedures on the fracture strength of endodontically treated teeth, potentially due to methodological differences among the studies.…”

Section: Introductionmentioning

confidence: 99%

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Critical evaluation of fracture strength testing for endodontically treated teeth: a finite element analysis study

et al. 2019

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Objectives The aim of this study was to investigate whether the diameter and direction of the plunger and simulation of the periodontal ligament (PDL) affected the stress distribution in endodontically treated premolars. Methods A fracture strength test was simulated via finite element analysis. A base model was set up, and the following parameters were modified: plunger diameter (3 mm vs. 6 mm), plunger direction (vertical vs. 135° angular to the central fossa), and PDL simulation. The analysis was conducted using the CosmosWorks structural analysis program, and the results are presented in terms of von Mises stresses. Results The smaller plunger increased the stresses at the contact area of the crown, but the plunger diameter had no effect on the stress distribution within the root. An angular plunger direction increased stresses within the root, as well as at the buccal cusp of the crown, compared with the vertical direction. Simulation of the PDL caused higher stress accumulation, especially in the cervical region of the root. Conclusions The plunger diameter had no effect on the stress distribution in the roots, whereas the plunger direction and PDL simulation did affect the stress distribution. More stringent standards can be established by taking such parameters into account when performing fracture testing in future studies.

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Section: Discussionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Critical evaluation of fracture strength testing for endodontically treated teeth: a finite element analysis study

et al. 2019

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“…They found that fracture strength of endodontically treated mandibular molars with MOD cavities was significantly improved by the application of Ribbond. Hshad et al [23] determined that inserting Ribbond under hybrid resin composites significantly improved the fracture resistance of endodontically treated mandibular premolar teeth. Different from our study, in all of these previous studies, conventional composites were used for restoring the cavities.…”

Section: Discussionmentioning

confidence: 99%

Can Fiber Application Affect the Fracture Strength of Endodontically Treated Teeth Restored with a Low Viscosity Bulk-Fill Composite?

Dalkılıç

Kazak

Hisarbeyli

et al. 2019

BioMed Research International

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Objective The aim of this study is to evaluate the effects of different fiber insertion techniques and thermomechanical aging on the fracture resistance of endodontically treated mandibular premolar teeth restored using bulk-fill composites. Materials and Methods Eighty human mandibular premolar teeth were randomly divided into eight groups: Group IN, Group BF, Group PRF1, Group PRF2, Group IN-TMA, Group BF-TMA, Group PRF1-TMA ,and Group PRF2-TMA. Group IN (intact) and Group IN-TMA (intact but subjected to thermomechanical aging) served as control groups. In the other six groups, endodontic treatment was performed and standardized mesio-occluso-distal (MOD) cavities were prepared. In BF, PRF1, and PRF2, the cavities were restored with bulk-fill composite only, bulk-fill/Ribbond, and bulk-fill/additional Ribbond, respectively. In BF-TMA, PRF1-TMA, and PRF2-TMA, the teeth were subjected to thermomechanical aging after the restorations. All of the teeth were fractured on the universal testing machine. Fracture surfaces were analyzed with a stereomicroscope. Results Control groups showed significantly higher fracture strengths than tested groups (P<0.05). No statistically significant difference was observed among the tested groups (P>0.05). Most of the favorable fractures were seen in PRF1, PRF2, and PRF2-TMA. Most of the unfavorable fractures were seen in BF-TMA. Conclusions Although fiber insertion with different techniques did not increase the fracture strength of teeth restored with bulk-fill composites, it increased the favorable fracture modes. Thermomechanical aging did not change the fracture strength of the groups.

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“…Several studies have confirmed the efficacy of high molecular-weight polyethylene fibers for reinforcement of composite resins as stress breakers in extensive composite resin restorations, indicating that placement of these fibers increases the fracture resistance of endodontically treated teeth [11][12][13][14][15][16][17], with more occlusal fibers exerting greater effects [13,14]. In addition, horizontal transfixation of the remaining buccal and palatal walls of endodontically treated molars by glass fiber posts and restoration with composite resin significantly increase fracture resistance [15].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, horizontal transfixation of the remaining buccal and palatal walls of endodontically treated molars by glass fiber posts and restoration with composite resin significantly increase fracture resistance [15]. However, none of the restorative techniques used so far have been able to increase the fracture resistance of endodontically treated teeth to the level of intact teeth [12][13][14][15]17]. Furthermore, it is not clear which of the above-mentioned adhesive restorative techniques results in a greater increase in fracture resistance and whether a combination of these two techniques as a new restorative technique can result in a great increase in fracture strength to the level of an intact tooth.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Fiber Reinforcement Strategies on the Fracture Strength of Composite Resin Restored Endodontically Treated Premolars

Bahari¹,

Mohammadi²,

Kimyai³

et al. 2019

Pesqui. bras. odontopediatria clín. integr.

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Objective: To compare the effect of three different fiber reinforcement strategies on the fracture strength of composite resin restored endodontically treated premolars. Material and Methods: Seventy-two sound human premolars extracted for orthodontic reasons were divided into 6 groups (n=12) after endodontic treatment. Group 1: intact teeth (positive control); Group 2: endodontically treated teeth without restoration (negative control); Group 3: composite resin restoration; Group 4: placement of fibers at occlusal position; Group 5: splinting the buccal and palatal walls with horizontal fiber posts; Group 6: placement of fibers at the occlusal position after splinting the buccal and palatal walls with horizontal fiber posts. Then fracture strength was measured at a crosshead speed of 0.5 mm/min in a universal testing machine. Data were analyzed using one-way ANOVA and post hoc Tukey tests at α=0.05. Results: There were significant differences between the negative and positive control groups (p<0.001) and between the negative control group and all the other study groups (p<0.001). However, there were no statistically significant differences between the positive control group and all the experimental groups and between the experimental groups (p>0.05). Conclusion: Fiber insertion had no additional reinforcing effect on the fracture strength following composite resin restoration.

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Influence of Different Restoration Techniques on Fracture Resistance of Root-filled Teeth: In Vitro Investigation

Abstract: Polyethylene ribbon fiber considerably increases the fracture strength of mandibular premolar teeth with MOD cavities restored with composite.

Cited by 16 publications

References 25 publications

Critical evaluation of fracture strength testing for endodontically treated teeth: a finite element analysis study

Critical evaluation of fracture strength testing for endodontically treated teeth: a finite element analysis study

Can Fiber Application Affect the Fracture Strength of Endodontically Treated Teeth Restored with a Low Viscosity Bulk-Fill Composite?

Effect of Different Fiber Reinforcement Strategies on the Fracture Strength of Composite Resin Restored Endodontically Treated Premolars

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