Fracture Strength and Nanoleakage of Weakened Roots Reconstructed Using Relined Glass Fiber–Reinforced Dowels Combined with a Novel Prefabricated Core System

Amin, Rania A.; Mandour, Mona H.; El-Ghany, Ossama Saleh Abd

doi:10.1111/jopr.12139

Cited by 23 publications

(21 citation statements)

References 38 publications

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“… and Amin et al . ). The techniques of customization of glass fibre posts with composite resin, adopted in this and other studies, may explain the similar results, because the protocols employed were able to match the values of fracture resistance of intact and weakened roots.…”

Section: Discussionmentioning

confidence: 97%

Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth

et al. 2016

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Section: Discussionmentioning

confidence: 97%

Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth

et al. 2016

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“…(23) Study was reported that thicker root dentin walls significantly increase the fracture resistance of endodontically treated teeth. (24) Endocrown preparation preserves root tissue and limits internal preparation of the pulp chamber to its anatomic shape depending on the high bonding capacity of lithium disilicate ceramics to the dental structure. (20) Higher fracture strength values of endocrowns group may also be attributed to the thickness of the ceramic occlusal portion of endocrowns.…”

Section: Discussionmentioning

confidence: 99%

Fracture Strength and Retention of All-Ceramic Endocrowns Luted Using Two Different Resin Cements

Khemakhem¹,

Mandour

Amin

2017

ADJ-for Girls

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Purpose: The purpose of this in vitro study was to evaluate and compare the fracture resistance and retention of CAD/CAM endocrowns and conventional glass fiber post supported crowns. Materials and Methods: Sixty-four (N=64) sound mandibular molars were endodontically treated and randomly assigned into 2 groups (n=32 each) according to the type of restoration constructed; Group (E): Endodontically treated teeth restored with IPS e.max CAD, lithium disilicate based, endocrowns and Group (P): Endodontically treated teeth restored with glass-fiber posts, composite cores and IPS e. max CAD crowns. Samples of each group were further subdivided into 2 subgroups (n=16 each) according to the type of adhesive resin cement used. the samples were thermocycled (2000 cycle, between 5 o C-55 o C). Samples were mounted in a universal testing machine and loaded to failure at a crosshead speed of 1.0 mm / min. The failure loads were recorded. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey's post hoc significance difference tests. Differences were considered significant at P<0.05. The pull-out test was performed on a universal testing machine and the values obtained were statistically analyzed by analysis of variance using one-way analysis of variance (ANOVA)) and multiple comparison test of Tukey, with level of significance at P<0.05. Results: Statistical analysis using twoway analysis of variance (ANOVA) test revealed no statistically significant difference in failure load among the four tested subgroups (at P< 0.05). Endocrowns recorded statistically significant mean higher fracture load values (1729.91N±407.9) compared to post retained crowns, (1435.84±405.2). Statistical analysis using two ways analysis of variance (ANOVA) test revealed a statistically significant difference in debonding load among the four tested subgroups (at P<0.05). Tukey's post hoc test revealed a significant difference between each two subgroups. The highest mean debonding load was recorded in the subgroup (PR) (96.98N±4.47), whereas the least value was recorded in the subgroup (EM) (49.48N±3.81). Conclusions: lithium disilicate based endocrown restorations increase the fracture resistance of endodontically treated molars compared to conventional crowns associated with glass fiber posts and resin composite filling cores.

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“…However, in addition to not being esthetically satisfactory, this type of intraradicular retainer requires greater clinic time to fabricate it and wear and tear on the already fragile crown structure [5]. Another important factor is that, due to the metal's high elastic modulus when compared to that of root dentin, the core transfers a large part of the masticatory forces received directly to the root, which may result in fractures [6, 7]. …”

Section: Introductionmentioning

confidence: 99%

Effect of Anatomical Customization of the Fiber Post on the Bond Strength of a Self-Adhesive Resin Cement

Rocha

Gonçalves

Vasconcelos

et al. 2017

International Journal of Dentistry

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Aim The aim of the study was to evaluate, by means of the push-out test, the effect of the anatomical customization of the fiber post on the bond strength of a self-adhesive resin cement. Methods Twelve endodontically treated, human, upper central incisors were randomly divided into two groups (n = 6): control (glass fiber posts cemented with Relyx® U200) and customized (glass fiber posts anatomically customized with translucent composite resin cemented with Relyx U200). The roots were sectioned into three slices, cervical, middle, and apical, and photographed with a digital camera attached to a stereomicroscopic loupe. The images were analyzed by software, for evaluation of the cement line. The slices were subsequently submitted to the push-out test until the post had completely extruded, and the fracture mode was analyzed with a stereomicroscopic loupe. Results The results showed significant differences between the groups in the different root thirds in relation to the area occupied by air bubbles (p < 0.05). Bond strength, when all the thirds are considered, was 8.77 ± 4.89 MPa for the control group and 16.96 ± 4.85 MPa for the customized group. Conclusion The customized group showed greater bond resistance than the control group and a more uniform cement layer.

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Fracture Strength and Nanoleakage of Weakened Roots Reconstructed Using Relined Glass Fiber–Reinforced Dowels Combined with a Novel Prefabricated Core System

Cited by 23 publications

References 38 publications

Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth

Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth

Fracture Strength and Retention of All-Ceramic Endocrowns Luted Using Two Different Resin Cements

Effect of Anatomical Customization of the Fiber Post on the Bond Strength of a Self-Adhesive Resin Cement

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