background:the diagnostic accuracy of frozen section as an important source of information in surgical pathology is important not only in the management of surgical patients but also as a measure of quality control in surgical pathology. in this study, we evaluated the diagnostic accuracy of frozen sections over a 6-year period in a teaching hospital in iran. methods: we retrospectively review...

INTRODUCTION Young's modulus (E) and Poisson's ratio (v) of the periodontal ligament are needed in a finite element analysis for investigating the biomechanical behavior of a tooth, periodontal ligament, and bone complex. However, large discrepancies in E (0.01-1,750 MPa) and v (0.28-0.49) were reported previously. The objective of this study was to narrow the ranges and to provide equivalent E...

In designing longitudinal studies, researchers must determine the number of subjects to randomize based on the power to detect a clinically meaningful treatment difference and a proposed analysis plan. In this paper, we present formulas for sample size estimation and an assessment of statistical power for a two-treatment repeated measures design allowing for subject attrition. These formulas ca...

Introduction Tooth loss significantly impacts individuals’ functional capabilities and quality of life. Fixed partial dentures have been a reliable treatment method for tooth replacement, with their fabrication often involving waxes. Waxes play crucial role in creating wax pattern dental restoration; particular, inlay waxes the shape, size, contour restorations. However, these inherent disadvan...

Occlusal trauma is to the periodontium from functional or parafunctional force’s causing damage teeth and its attachment apparatus by exceeding adaptive reparative capacities. instability a common cause for occlusion, resulting in numerous complications. It often leads interference which reflexively shifts slides jaw forward on one both side find spot where most come together. This action prote...