Results: 137

The use of a liner under different bulk-fill resin composites: 3D GAP formation analysis by x-ray microcomputed tomography

J. appl. oral sci; 28 (), 2020
Abstract Gap formation of composite resin restorations is a serious shortcoming in clinical practice. Polymerization shrinkage stress exceeds the tooth-restoration bond strength, and it causes bacterial infiltration within gaps between cavity walls and the restorative material. Thus, an intermediate line...

Influência do tipo de compósito e tempo de exposição aos raios-x na produção de artefatos radiográficos em modelos de restauração classe II
Influence of the type of composite and time of exposure to x-rays on the production of radiographic artifacts in class II restoration models

Objetivo: Avaliar o efeito do tempo de exposição e do tipo de compósito na produção de artefato radiográfico na interface dente/material restaurador. Materiais e Métodos: Em 20 incisivos bovinos hígidos foram feitos preparos cavitários e restaurações classe II utilizando resinas compostas Filt...

Direct resin composite restoration of endodontically-treated permanent molars in adolescents: bite force and patient-specific finite element analysis

J. appl. oral sci; 28 (), 2020
Abstract Objective To evaluate the influence of three levels of dental structure loss on stress distribution and bite load in root canal-treated young molar teeth that were filled with bulk-fill resin composite, using finite element analysis (FEA) to predict clinical failure. Methodology Three first ...

Effect of 10% sodium ascorbate applied for different time periods on shear bond strength of composite to bleached enamel

J. oral res. (Impresa); 8 (4), 2019
Aims: Residual peroxide on the enamel surface and in the interprismatic spaces decreases the shear bond strength (SBS) of composite to bleached enamel. Evidence shows that 10% sodium ascorbate can efficiently neutralize the singlet oxygen generated by the bleaching agents. This study aimed to assess the ...

Smile makeover by veneers – case report

J. oral res. (Impresa); 8 (4), 2019
Ceramic veneers have evolved in the last few years as an aesthetic restoration in the field of aesthetic dentistry. It is a conservative option as compared to full coverage crowns for improving the patients smile. Ceramic veneers are widely used for smile designing in patients with fluorosis, midline dia...

Comparison of the Polymerization Shrinkage of Eclipse Resin for Prostheses with Conventional Acrylic Resins

ABSTRACT: The objective of this study was to compare the polymerization shrinkage of Eclipse photopolymerization resin for prosthesis based on urethane dimethacrylate (UDMA) with that of three heat-cured acrylic resins based on polymethyl methacrylate (PMMA) after the polymerization process and immersion...

Bacterial colonization of composite resins used with direct technique: a brief review

In restorative dentistry, the use of composite resins with direct technique for the replacement of missing tooth structure is very common. One drawback is that surface roughness allows the adherence of microorganisms and the formation of dental plaque, being the polishing technique a key stage in the res...

Six month follow-up of two bulk-fill composites in non-carious cervical lesions: double blind randomized clinical trial

J. oral res. (Impresa); 8 (3), 2019
Objective: To assess the six-month clinical outcome of restorations of non-carious cervical lesions (NCCL) with two composite resins: Bulk-Fill and nanohybrid resin. Materials and methods: Fifty-one patients, with three NCCLs each, were randomly allocated into three restoration groups: Tetric-N-Ceram Bul...

Marginal filling and adhesive resistance of bulk fill resin applying 18% edta gel compared with 37% phosphoric acid gel in vitro dental conditioning

J. oral res. (Impresa); 8 (3), 2019
Objective. To evaluate the degree of marginal sealing and adhesive strength in Bulk-Fill resin by applying 18% EDTA gel compared to 37% phosphoric acid gel in dental conditioning. Materials and methods. The study was transversal, experimental comparative, and applied. The sample group consisted of 60 tee...

Resistência à flexão de duas resinas compostas diretas após diferentes métodos de polimerização

RFO UPF; 24 (2), 2019
Objetivo: avaliar a influência de diferentes modos de polimerização sobre a resistência à flexão de três pontos de duas resinas compostas. Métodos: foram confeccionadas 88 amostras, sendo divididas em dois grupos, conforme a resina composta utilizada: Filtek Z350 XT e Forma. Os grupos foram subdi...