An indirect method to locate the first tooth contacts in centric relation was described in this study. Mounted casts with an associated table and styli were used to locate the position of contact points in three planes. The method was tested using the anterior occlusal stop with chin point guidance and bimanual manipulation for recording centric relation. Ten records from one subject were analy...

The various symptoms related to nonfunctional tooth contact can be reduced by focusing on avoiding excessive contact. Although patients make a conscious effort to keep their teeth apart after receiving advice from their dentists, this approach may not work in some patients. For such patients, we propose an alternative approach that involves unilateral intraoral application of a small device ont...

OBJECTIVE To assess the discrepancies in marginal integrity and contact points of Porcelain Fused to Metal (PFM) crowns and its association with caries in adjacent teeth. STUDY DESIGN Cross-sectional study. PLACE AND DURATION OF STUDY Dental Section of the Aga Khan University Hospital, Karachi, from January to August 2009. METHODOLOGY Ninety six (96) patients with PFM crowns on maxillary ...

This article reports on the use of a natural tooth crown to repair substantial defects caused by caries. A 50 y old woman wished to have a mandibular left-side third molar extracted. Concurrently, the patient voiced concerns about the metal collar of a premolar. It was decided to extract the third molar and to use this tooth to perform an autologous tooth crown transplant at the upper second pr...

objectives: this study sought to assess the effects of length and inclination of implants on stress distribution in an implant and terminal abutment teeth in an implant assisted-removable partial denture (rpd) using three-dimensional (3d) finite element analysis (fea).   materials and methods: in this in vitro study, a 3d finite element model of a partially dentate mandible with a distal extens...

A dynamic analysis method is firstly presented to make up the present methods for calculating the strength of the cylindrical gear pair. The transient stress distribution and variation in the process of gear meshing can be obtained by dynamic simulation, the maximum bending stress, the maximum tooth contact stress and the corresponding worst meshing locations of the gear pair can be also accura...

The effect of gear contact state change due to shaft misalignment on meshing stiffness is usually neglected in the traditional calculation model with error, further influence mechanism dynamic characteristics also unclear. To address these shortcomings, a new mesh misaligned considering effects tooth proposed by combining improved loaded analysis (LTCA) model. Then changes aroused excitation ar...

In this study, the elastohydrodynamic lubrication (EHL) behaviour of high-speed spur gear contacts is investigated under dynamic conditions. A non-linear time-varying vibratory model of spur gear pairs is introduced to predict the instantaneous tooth forces under dynamic conditions within both the linear and non-linear operating regimes. In this model, the periodically time-varying gear mesh st...