A comparison of stresses in molar teeth restored with inlays and direct restorations, including polymerization shrinkage of composite resin and tooth loading during mastication

Dejak, Beata; Młotkowski, Andrzej

doi:10.1016/j.dental.2014.11.016

Cited by 77 publications

(59 citation statements)

References 42 publications

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“…Marginal gaps develop over time with exposure to the oral environment, because of differences in the coefficient of thermal expansion and surface wear (20). An incremental filling technique, combined with a low configuration factor, may reduce damaging polymerization shrinkage stresses and maintain satisfactory adaptation of a restoration (21). The size and location of restorations affect the wear of resin composites (22).…”

Section: Secondary Caries Alpha No Clinical Diagnosis Of Caries Bravomentioning

confidence: 99%

Three-year clinical evaluation of posterior composite restorations placed with a single-step self-etch adhesive

et al. 2015

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Section: Secondary Caries Alpha No Clinical Diagnosis Of Caries Bravomentioning

confidence: 99%

Three-year clinical evaluation of posterior composite restorations placed with a single-step self-etch adhesive

et al. 2015

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“…, in a recent systematic review. In addition, an in‐depth analysis of the fracture behavior and stress concentrations along the interface designs could be examined closely by utilizing a technique such as the 3D Finite Element Method .…”

Section: Discussionmentioning

confidence: 99%

Effect of interface surface design on the fracture behavior of bilayered composites

Omran

Garoushi

Lassila

et al. 2019

European J Oral Sciences

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This study aimed to evaluate the effect of different interface designs on the load‐bearing capacity of bilayered composite structures (BLS). Cylindrical specimens of BLS were prepared from base composite of 3.5 mm thickness and surface composite of 1.5 mm thickness (n = 80). Two different base composites – flowable bulk‐fill (FBF) [smart dentin replacement (SDR)] and short fiber‐reinforced (FRC) (everX Posterior) – were evaluated, and conventional composite (G‐ænial Posterior) was used as the surface layer. Four different interface designs were used: (i) pyramidal; (ii) mesh; (iii) linear grooves; and (iv) flat surface (control). Three‐dimensional printed molds were fabricated to standardize the interface design between the surface and the base composites. The specimens were then statically loaded with a steel ball until fracture using a universal testing machine. Fracture types were classified into catastrophic, complete, and partial bulk. ANOVA revealed that both the material and the interface design had a statistically significant effect on the load‐bearing capacity. Flowable bulk‐fill showed lower mean load‐bearing capacity than FRC in all the interface designs tested, except for the flat surface design. Fracture analysis showed that FRC demonstrated up to 100% partial bulk fractures with the pyramid interface design, but no incidence of catastrophic bulk fracture. By contrast, FBF demonstrated up to 84.6% and 40% catastrophic bulk fractures with the flat interface design but no incidence of partial bulk fracture. Consequently, the interface designs studied enhanced the fracture behavior of BLS.

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“…That reduces the strength of the teeth [33, 34], and leads to higher failure rates [35–37]. High shear and tensile stresses concentrate at the interface of direct composite MOD restorations when subjected to chewing simulations, which can threaten interfacial integrity [38]. Even though interfacial degradation and secondary caries can develop anywhere in the tooth, studies have reported that secondary caries mostly occurs at gingival margin of class-II and class-V restorations [39–41].…”

Section: Discussionmentioning

confidence: 99%

Interfacial degradation of adhesive composite restorations mediated by oral biofilms and mechanical challenge in an extracted tooth model of secondary caries

Carrera

Chen

et al. 2017

Journal of Dentistry

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Objective To study the combined effect of simulated occlusal loading and plaque-derived biofilm on the interfacial integrity of dental composite restorations, and to explore whether the effects are modulated by the incorporation of sucrose. Methods MOD-class-II restorations were prepared in third molars. Half of the specimens (n=27) were subjected to 200,000 cycles of mechanical loading using an artificial oral environment (ART). Then, both groups of specimens (fatigued and non-fatigued) were divided into three subgroups for testing in CDC-reactors under the following conditions: no biofilm (Control), biofilm with no sucrose (BNS) and biofilm pulsed with sucrose (BWS). BNS and BWS reactors were incubated with a multispecies inoculum from a single plaque donor whereas the control reactor was not. The BWS reactor was pulsed with sucrose five times a day. The biofilm challenges were repeated sequentially for 12 weeks. pH was recorded for each run. Specimens were examined for demineralization with micro-CT and load capacity by fast fracture test. Results Demineralization next to the restorations was only detectable in BWS teeth. Fracture loads were significantly reduced by the concomitant presence of biofilm and sucrose, regardless of whether cyclic mechanical loading was applied. Cyclic loading reduced fracture loads under all reactor conditions, but the reduction was not statistically significant. Conclusions Sucrose pulsing was required to induce biofilm-mediated degradation of the adhesive interface. We have presented a comprehensive and clinically relevant model to study the effects of mechanical loading and microbial challenge on the interfacial integrity of dental restorations.

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A comparison of stresses in molar teeth restored with inlays and direct restorations, including polymerization shrinkage of composite resin and tooth loading during mastication

Cited by 77 publications

References 42 publications

Three-year clinical evaluation of posterior composite restorations placed with a single-step self-etch adhesive

Three-year clinical evaluation of posterior composite restorations placed with a single-step self-etch adhesive

Effect of interface surface design on the fracture behavior of bilayered composites

Interfacial degradation of adhesive composite restorations mediated by oral biofilms and mechanical challenge in an extracted tooth model of secondary caries

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