Results: 118

Finite Element Analysis of a Controlled Dynamization Device for External Circular Fixation

Abstract Objective To virtually prototype a device for external circular fixation of long bone fractures with controlled dynamization made of two different materials and predict their mechanical behavior by using the finite element analysis (FEA) method. Method A software was used for 3D modeling two m...

Influence of bone defect position and span in 3-point bending tests: experimental and finite element analysis

Abstract: Three-point bending test is the most common mechanical test used for quantifying the biomechanical quality of bone tissue and bone healing in small animals. However, there is a lack of standardization for evaluation of bone repair by cortical perforation. The aim of this study was to determine ...

Avaliação de diferentes desenhos de preparo para restaurações parciais indiretas de cobertura total

Este estudo avaliou o efeito de 3 desenhos de preparos dentários para restaurações parciais indiretas de cobertura total na veracidade e precisão de modelos digitais obtidos por 3 escâneres intraorais; e na tensão de contração de polimerização residual por meio de análise de elementos finitos....

Influence of fibromucosa height and loading on the stress distribution of a total prosthesis: a finite element analysis

Braz. dent. sci; 24 (2), 2021
Purpose: To evaluate the effect of fibromucosa height on the stress distribution and displacement of mandibular total prostheses during posterior unilateral load, posterior bilateral load and anterior guidance using the finite element analysis (FEA). Material and methods: 3D virt...

Influence of Preparation Design, Restorative Material and Load Direction on The Stress Distribution of Ceramic Veneer in Upper Central Incisor

Braz. dent. sci; 24 (3), 2021
Objective: Evaluate the effect of four preparation designs, two ceramic materials, and two occlusion contact types on the stress distribution of ceramic veneer in upper central incisor. Material and methods: 3D-models were performed in the modeling sof...

Mechanical and thermal stress analysis of hybrid ceramic and lithium disilicate based ceramic CAD-CAM inlays using 3-D finite element analysis

Braz. dent. sci; 24 (3), 2021
Objective: The aim of this study was to analyze mechanical and thermal stresses of hybrid ceramic and lithium disilicate based ceramic of CAD/CAM inlays using 3D Finite element analysis. Material and Methods:A three dimensions finite element model of permanent maxillary premolar des...

Evaluation of stability of three different mini-implants, based on thread shape factor and numerical analysis of stress around mini-implants with different insertion angle, with relation to en-masse retraction force

ABSTRACT Objectives: Assess the stability of three different mini-implants, based on thread shape factor (TSF), and evaluate stresses at the mini-implant site and surrounding cortical bone on application of retraction force, at two different insertion angles. Methods: Mini-implants of three different ...

Effect of orthodontic bracket type and mouthguard presence on the stress and strain during a frontal impact

Braz. dent. j; 31 (5), 2020
Abstract The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceramic) and mouthguard on biomechanical response during impact. Two-dimensional plane-strain models of a patient with increased positive overjet of the maxillary central incisor was created based on a CT...

Von Mises stresses on Mushroom-loop archwires for incisor retraction: a numerical study

ABSTRACT Objective: To perform a numerical simulation using FEM to study the von Mises stresses on Mushroom archwires. Methods: Mushroom archwires made of titanium-molybdenum alloy with 0.017 x 0.025-in cross-section were used in this study. A YS of 1240 MPa and a Young's modulus of 69 GPa were adopte...

Influência das características clínicas e fatores associados às lesões cervicais não-cariosas e tipo de resina composta sobre o sucesso restaurador: observações in silico, in vitro, in vivo e revisão sistemática

O presente trabalho teve como objetivos: (1) analisar, in silico, o efeito de diferentes técnicas restauradoras sobre a concentração de tensão em lesões cervicais não cariosas (LCNCs); (2) avaliar in silico e in vitro a influência do ângulo cavo-superficial sobre a concentração de tensão em LC...