Results: 45

Alternative method of photopolymerization of composite resin specimen for flexural strength test

The flexural resistence is one of the most used test in researchs of mechanical characterization of resin composites for dental restoration. ISO 4049 photopolymerization technique performed static application stages of light tip. To polymerize the entire area of the specimen some areas must receive extra...

Impact of plasticization temperature on the mechanical properties of sports mouthguards

Braz. dent. sci; 27 (2), 2024
Objective: Mouthguards can reduce or even prevent orofacial injuries. These devices are responsible for absorbing part of the energy of an impact force, while the remaining part is dissipated. The present study aimed to evaluate how the plasticization temperature of the sports mouthguards�...

Evaluation of the Mechanical Behavior of the Patellar and Semitendinosus Tendons Using Supersonic Shear-wave Imaging (SSI) Elastography and Tensile Tests

Abstract Objective To analyze the mechanical properties of the patellar (PT) and semitendinosus (ST) tendons from fresh-frozen human cadavers from a tissue bank using supersonic shear-wave imaging (SSI) elastography and tensile tests. Methods We tested seven PT and five ST samples on a traction machine...

Strain gauge evaluation of bone microstrain in full-arch implant-supported prostheses: cobalt-chromium and fiberglass materials

Braz. dent. sci; 27 (3), 2024
Objective: This study addresses the strain gauge evaluation of bone microstrain in full-arch implant-supported prostheses using two distinct materials: Cobalt-Chromium (CoCr) and Fiber Reinforced with Composite (FRC). Material and methods: By employing strain gauge analysis, this study compares the mecha...

Influencia del tipo de cubeta y la aplicación de adhesivos en la exactitud de modelos obtenidos con siliconas por adición
the influence of tray type and adhesives application on the accuracy of addition silicone models

El resultado de modelos de trabajos exactos en odon- tología, resignifica analizar diversas cuestiones que influyen durante la manipulación de los materiales, toma de impresión, posterior remoción y vaciado a fin de minimizar distorsiones que impactan sustan- cialmente en la obtención de un modelo d...

Comportamiento Mecánico de un Premolar Humano Sano Sometido a Fuerzas Funcionales y Disfuncionales en un MEF

Int. j. morphol; 41 (5), 2023
El propósito de este estudio fue analizar el comportamiento mecánico de la estructura dental sana de un primer premolar inferior humano sometido a fuerzas funcionales y disfuncionales en diferentes direcciones. Se buscó comprender, bajo las variables contempladas, las zonas de concentración de esfuer...

Influência da profundidade e de um processo de envelhecimento acelerado em propriedades de resinas bulk fill

O presente estudo teve como objetivo avaliar o desempenho de quatro resinas bulk fill (Filtek Bulk Fill (FBF), Opus Bulk Fill (OBF), Sonicfill (SF) e Tetric N-Ceram Bulk Fill (TNBF)) e uma resina convencional (Charisma Diamond (CD)) quanto às seguintes propriedades: resistência à flexão (RF), módulo...

Study of nonlinear viscoelastic mechanical properties of degenerated intervertebral discs

Int. j. morphol; 40 (3), 2022
SUMMARY: Biomechanical factors are important factors in inducing intervertebral disc degeneration, in this paper, the nonlinear viscoelastic mechanical properties of degenerated intervertebral discs were analyzed experimentally. Firstly, the loading and unloading curves of intervertebral discs before and...

Incorporation of a polymerization catalyst for improved mechanical behavior and physicochemical characteristics of a light-cured pulp capping material

Braz. dent. sci; 25 (1), 2022
Objective: To evaluate the influence of the incorporation of a polymerization catalyst to a light-cured pulp capping material on mechanical behavior and physicochemical characteristics. Material and Methods: Different percentages (2 wt%, and 4 wt%) of diphenyliodonium hexafluorophosphate (DPI) were incor...

Comparación del módulo de elasticidad y resistencia de la resina acrílica de termocurado y la resina flexible superpoliamida. Estudio in vitro
Comparison of the module of elasticity and resistance of thermal curing acrylic resin and flexible superpolyamide resin. An in vitro study

Objetivo: Comparar el módulo de elasticidad y resistencia de la resina acrílica de termocurado y la resina flexible superpoliamida. Métodos: Se diseñó un estudio experimental que empleó dos tipos de resinas acrílicas preparadas en cera para obtener una forma rectangular de 64 mm de largo, 10 mm de...