In order to investigate the properties of Y-shaped cracks of brittle materials under compression, compression tests by using square cement mortar specimens with Y-shaped crack were conducted. A true triaxial loading device was applied in the tests, and the major principle stresses or the critical stresses were measured. The results show that as the branch angle θ between the branch crack and th...

Corresponding Author: Dr. Pallavi Vashisth Senior Lecturer, Dept of Pedodontics, Institute of Dental Sciences, Bareilly, Uttar Pradesh (India). Contact : +919837968101 Email: [email protected]

The evolution of dispersed short-fatigue-cracks is analysed based on the equilibrium of crack-number-density (CND). By separating the mean value and the stochastic ̄uctuation of local CND, the equilibrium equation of overall CND is derived. Comparing with the mean-®eld equilibrium equation, the equilibrium equation of overall CND has di€erent forms in the expression of crack-nucleation-rate or ...

In a retrospective study we reviewed 28 refractures of the forearm in children, which occurred at a mean of 14 weeks after conservative treatment of the primary fracture. The cause for the refracture was incomplete healing of a primary greenstick fracture in 21 cases (84%). Twenty-two recurrent fractures were treated conservatively, but two had a second refracture. Fifteen patients were followe...

Purpose: Root fracture is a clinical problem which often is difficult to detect and diagnose. As the root fracture detection is based on demonstration of a fracture line or lines, radiographic examination is important. The aim of this study was to compare diagnostic efficacy of direct digital radiography with conventional radiography for detecting experimental root fractures. Materials & Method...

Abstract Background the position and angulation of mandibular third molars have both been found to influence angle condylar fractures. Objective: To identify whether there is an association between depth molar impaction relative risk fracture condyle. Method Four-hundred eighty-two panoramic dental radiographs were assessed for period from January 2012 June 2020. The study variables included pr...

Introduction This study aimed to compare the incidence of dentinal crack formation by instrumentation with ProTaper Universal system (rotary, multi-file system), SafeSider (reciprocation movement, multi-file system) and Neolix (rotary, single-file system). Methods and Materials In this in vitro study, 60 freshly extracted mandibular first molars were randomly divided into three experimental g...

Traditionally, thick enamel has often been used to infer durophagy (i.e., hard nut and seed consumption) in extinct hominins. These inferences are based on the hypothesis that thick enamel is primarily an adaptation to prevent tooth fracture or chipping resulting from high-stress loads produced during the mastication of large hard foods. An alternative view argues that thick enamel may aid in m...

The potential challenge at the fag end of orthodontic treatment is to restore the tooth structure as was prior to the beginning of the treatment. The aim of the article is to give a proper insight into the methodology of debonding not only from the orthodontist’s point of view but also keeping in mind the general practitioners who follow the procedure. At times, cases which are very well treate...