Abstract The article presents a comprehensive study on the tooth bending strength of spur gears with progressive curved path contact, or so-called S-gears. Systematic gear meshing simulations were conducted to effects S-gear geometry parameters strength. Different geometries analysed in systematically organized manner, and comparison was made against standard 20° pressure angle involute shape. ...

The hypocycloidal flanks of the cylindrical gear teeth have the flank lines defined by lengthened or shortened hypocycloid and the profile involute. The curved and bulged flanks have some advantages, among them being the increased strength in bending and controlled positioning of the contact imprint. The tooth flank generation has on the basis the application of the technological process of mil...

In this paper the mechanical analysis of the film picking forks roller tooth in field -cleaning machine was done. A finite element analysis model was built and used by the non-linear finite element analysis method. It is obtained from the result of post-processing calculation and analysis that according to the Fourth Strength Theory, the maximum equivalent stress on the pole tooth root under th...

One of the most frequent fracture modes in teeth is chipping. It can lead to deterioration and ultimate loss of tooth function. Chips in enamel can also be used to gain insight into the evolutionary history of extant animal and fossil hominin species. In this study, chipping tests are performed on the surfaces of as-received or flattened human molars using hard indenters. The chips exhibit a ch...

Immediate placement of dental implant into the fresh extraction socket has been an acceptable procedure for the past two decades. Commonly, immediate placement has been reserved for the single rooted anterior tooth and single or bi-rooted premolar tooth. To preserve the alveolar bone proper, particularly that of the labial and lingual plates of bone it is essential that the extraction should be...

Abstract As the most widely used gear measuring instrument, center can measure individual deviations of a tooth flank other than comprehensive gear. However, transmission error is an important performance indicator in meshing process. It trend to obtain from deviations. In this study, calculation method proposed based on point clouds obtained by optical sensors. According principle, introduced ...

PURPOSE To compare the changes in the occlusal vertical dimension, activity of masseter muscles and biting force after insertion of immediate denture constructed with conventional, tooth-supported and Implant-supported immediate mandibular complete denture. MATERIALS AND METHODS Patients were selected and treatment was carried out with all the three different concepts i.e, immediate denture c...