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The effect of surface roughness on the Weibull distribution of porcelain strength
Weibull modulus Surface roughness Flexural strength
2010/11/26
The purpose of the present study was to test the hypothesis that glazing will affect the Weibull modulus or the mean flexural strength of dental porcelain. Four groups (n = 30) of specimens were prepa...
Stress Distribution in Mandible and Temporomandibular Joint by Mandibular Distraction: A 3-Dimensional Finite-element Analysis
Mandibular distraction Three-dimensional finite-element method
2010/12/1
The effects of mandibular distraction on the mandible and its surrounding tissue remain to be clarified. Here, we used a 3-dimensional finite-element method to investigate the effects of unilateral ho...
Ferrule Designs and Stress Distribution in Endodontically Treated Upper Central Incisors:3D Finite Element Analysis
Post and Core Technique Finite Element Analysis Max-illa Incisor Tooth Nonvital
2009/12/17
Objective: The main goal of this study was to evaluate stress distribution of endodonti-cally treated maxillary central incisors restored with glass fiber posts, composite resin cores, and crowns with...
Blood Flow Distribution of Repaired Lip in Cleft Lip Patients
Cleft lip Scar Blood flow Laser Doppler imaging
2010/3/9
Objective: To investigate the blood flow distribution in the repaired lip of cleft patients using a laser Doppler imager and to evaluate the difference in blood flow of the scar tissue between unilate...
Photoelastic analysis of stress distribution on parallel and angled implants after installation of fixed prostheses
Dental implantation endosseous Prosthesis implantation
2009/10/20
The longevity of implant-supported prosthetic rehabilitation depends largely on how the masticatory forces are transferred to the implants and surrounding bone. Anatomical conditions, bone morphology ...
Prevalence and distribution of developmental enamel defects in the primary dentition of pre-school children
Enamel defect Developmental defect Dental enamel hypoplasia Dentition primary Prevalence
2009/10/19
Developmental defects of the enamel (D.D.E.) are changes in the deciduous dentition that have been little studied in Brazil, although they lead to aesthetic problems, dental sensitivity and may be pre...
Activity,distribution and regulation of phosphofructokinase in salivary gland of rats with streptozotocin-induced diabetes
Diabetes mellitus Phosphofructokinase-1 Salivary glands Parotid gland Submandibular gland
2009/10/19
Although the influence of diabetes on salivary glands is well studied, it still presents conflicting results. In this work, the regulation of the phosphofructokinase-1 enzyme (PFK-1) was studied utili...
Stress distribution in the cervical region of an upper central incisor in a 3D finite element model
Tooth injuries Tomography Methods Imaging three-dimensional Computing methodologies
2009/10/16
The aim of this study was to evaluate the stress distribution in the cervical region of a sound upper central incisor in two clinical situations, standard and maximum masticatory forces, by means of a...
Geographic Distribution of Postgraduate Dental Trainees in Japan
Postgraduate clinical training for dentists Imbalanced distribution of dentists Number of postgraduate dental trainees Clinical training facilities-group system
2010/1/21
Postgraduate clinical training for dentists in Japan became mandatory in April 2006. Mandatory postgraduate clinical training for physicians has been criticized as having accelerated the imbalance in ...
Influence of Layer Thickness on Stress Distribution in Ceramic-Cement-Dentin Multilayer Systems
All-ceramic FEA Cement
2009/9/11
The effects of dentin and cement thicknesses on stress level and distribution of crack propagation in ceramic-cement-dentin multilayer complex were analyzed. Custom-designed finite element analysis pr...
Stress Distribution in Roots Restored with Different Types of Post Systems with Composite Resin
Nonlinear finite element analysis Young's modulus Von Mises stress
2009/9/11
Although composite resin core is used with various types of prefabricated posts, it remains unclear which kind of material is most suitable for the post. The aim of this study was to evaluate the infl...
Investigation of Stress Distribution in Roots Restored with Different Crown Materials and Luting Agents
Nonlinear finite element analysis Young′s modulus Von Mises stress
2009/9/11
The purpose of this study was to identify crown materials and luting agents that would decrease the stress concentrated at the roots of endodontically treated teeth. To this end, natural tooth model (...
Three-dimensional Finite Element Analysis of Stress Distribution in Composite Resin Cores with Fiber Posts of Varying Diameters
Finite element analysis Composite resin core with fiber post Fiber post diameter
2009/9/11
Using three-dimensional finite element analysis (3D-FEA), stress distributions in the remaining radicular tooth structure were investigated under the condition of varying diameters of fiber post for f...
Effects of thermal cycling and surface roughness on the Weibull distribution of porcelain strength
Thermal cycling Weibull modulus Dental porcelain
2009/9/11
The objective of this study was to test the hypothesis that thermal cycling weakens the flexural strength of porcelain. Specimens of Deguceram Gold and Vita Omega 900 were tested in four groups of 30 ...
Geographic Distribution of Postgraduate Dental Trainees in Japan
Postgraduate clinical training for dentists Imbalanced distribution of dentists
2010/12/1
Postgraduate clinical training for dentists in Japan became mandatory in April 2006. Mandatory postgraduate clinical training for physicians has been criticized as having accelerated the imbalance in ...