Evaluation of Composite Adaptation to Pulpal Chamber Floor Using Optical Coherence Tomography

Scotti, Nicola; Alovisi, Camilla; Comba, Allegra; Ventura, G.; Pasqualini, Damiano; Grignolo, Federico; Berutti, Elio

doi:10.1016/j.joen.2015.10.006

Cited by 13 publications

(6 citation statements)

References 32 publications

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“…SEM micrographs, above all at higher magnification, still offer a gold standard qualitative analysis of the external margins of adhesive restorations, as shown in Figure 4 . Micro-CT, on the other hand, has the advantage of being a non-destructive method of analysis [ 45 , 46 ] that can offer not only a bi-dimensional, but also a tridimensional analysis of the sample before and after chewing simulation, therefore measuring gap progression in qualitative and quantitative ways. By contrast, SEM could be used to assess the presence of internal cracks even if sample sectioning is needed [ 47 ] and, when epoxy replicas are performed, only external margins can be inspected.…”

Section: Discussionmentioning

confidence: 99%

External Marginal Gap Variation and Residual Fracture Resistance of Composite and Lithium-Silicate CAD/CAM Overlays after Cyclic Fatigue over Endodontically-Treated Molars

et al. 2021

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The purpose of this in vitro study was to evaluate the external marginal gap variation with a 3D quantitative method and the residual fracture resistance after cyclic fatigue in endodontically treated molars restored with overlays of different materials, with and without fiber posts-supported buildups. Forty-eight human maxillary molars were selected, endodontically treated, prepared with standardized MOD cavities and randomly allocated into 6 study groups considering the “core strategy” (build-up with composite resin; build-up with composite resin supported by a fiber post); and the “restorative material” of the indirect adhesive overlay (GrandioBlocks, Voco; Cerasmart, GC; CeltraDuo, Dentsply). All procedures were executed according with manufacturers guidelines. Micro-CT analysis prior and after cyclic fatigue were executed, followed by scanning electron microscope analysis and fracture resistance test. The Two-Way ANOVA analysis showed that interfacial gap progression was significantly influenced by the “core strategy” (p < 0.01) but not of “restorative material” (p = 0.59). Concerning fracture resistance, “restorative material” was statistically significant (p < 0.01), while “core strategy” (p = 0.63) and the interaction (p = 0.84) were not. In conclusion, the fiber post presence within the build-up promoted a lower interfacial gap opening after fatigue, evaluated through micro-CT scans. In terms of fracture resistance, teeth restored with Cerasmart and Celtra Duo were statistically similar, but superior to GrandioBlocks.

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Section: Discussionmentioning

confidence: 99%

External Marginal Gap Variation and Residual Fracture Resistance of Composite and Lithium-Silicate CAD/CAM Overlays after Cyclic Fatigue over Endodontically-Treated Molars

et al. 2021

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“…The results obtained for maximal loading in the compression test showed that the flat interface design had the highest load‐bearing capacity of all interface designs tested. A potential explanation is that a flat design avoids the introduction of any voids that may act as areas of stress concentration . Hence, an interface with a large surface area and a gradient‐like design could ultimately present weak points in bilayered structures and cause fracture at lower loads.…”

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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“…Isso se deve ao elevado escoamento dessas resinas, o que permite que, mesmo em regiões de difícil aplicação, como na entrada dos canais, o material restaurador entre em contato com todas as paredes dentinárias. 18 O trabalho clínico incluído na revisão avaliou a longevidade das restaurações classe II por 3 anos, comparando as resinas bulk-fill com convencionais. Os autores avaliaram diversos parâmetros clínicos, como retenção, alteração de cor e rugosidade superficial, e não encontraram diferenças entre os grupos.…”

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Restauração de dentes tratados endodonticamente com resinas bulk-fill: revisão integrativa

França¹,

Portella

Reston

et al. 2018

Rev. da Fac. de Odontologia, UPF

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Objetivo: O objetivo deste estudo é realizar uma revisão de literatura sobre o emprego das resinas bulk-fill empregadas para restauração de dentes tratados endodonticamente. Pretende-se compilar os principais resultados de trabalhos clínicos e laboratoriais que avaliem resinas bulk-fill para restauração direta de dentes tratados endodonticamente. Método: A busca dos estudos foi realizada no portal PubMed, utilizando os descritores “bulk fill” e “endodontically treated”. Os dados extraídos foram agrupados em uma tabela-síntese apresentando as características metodológicas e os principais resultados de cada estudo. Resultados: Sete estudos foram incluídos na revisão e, dentre eles, cinco avaliaram a resistência a fratura dos dentes após a restauração, um avaliou a adaptação da resina ao assoalho da câmara pulpar e um trata-se de um ensaio clínico com acompanhamento de três anos, comparando o uso de resina bulk-fill com resina convencional. Conclusão: O desempenho das resinas bulk-fill mostrou-se semelhante às resinas convencionais quando comparadas quanto a resistência a fratura dos dentes (in vitro), e a longevidade (in vivo). A economia de tempo clínico proporcionada pelas resinas bulk-fill pode justificar o seu emprego para a restauração de dentes tratados endonticamente.

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Evaluation of Composite Adaptation to Pulpal Chamber Floor Using Optical Coherence Tomography

Cited by 13 publications

References 32 publications

External Marginal Gap Variation and Residual Fracture Resistance of Composite and Lithium-Silicate CAD/CAM Overlays after Cyclic Fatigue over Endodontically-Treated Molars

External Marginal Gap Variation and Residual Fracture Resistance of Composite and Lithium-Silicate CAD/CAM Overlays after Cyclic Fatigue over Endodontically-Treated Molars

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

Restauração de dentes tratados endodonticamente com resinas bulk-fill: revisão integrativa

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