Tooth root crack is considered as one of the crucial causes of failure in the gearing system and it occurs at the tooth root due to an excessive bending stress developed in the root region. The modern power transmission gear drives demand high bending load capacity, increased contact load capacity, low weight, reduced noise and longer life. These subsequent conditions are satisfied by the aid o...

The unloaded human finger with a taut deep flexor functions as a bi-articular chain. because the angulations of the distal two joints are mechanically coupled. In this chain two flexors exist: the superficial and deep flexor. However, for elementary control of the unloaded finger. only one flexor is required. This puts forward the question of which flexor is most suited for unloaded finger cont...

The wear of star wheel teeth is an importance issue in the single screw compressor. In order to enhance the wearresistance of star wheel teeth, some new profiles of the meshing pair were proposed to replace the currently used straight line envelope profile, such as single column envelope, multi-straight line (or multi-column) envelope. In this paper, a curved surface of the tooth flank is sugge...

This paper presents a static model for novel movable tooth drive with logarithmic spiral profiles, to research contact force and load distribution during the meshing period. According geometric properties of conjugate their compatibility law considering multi-tooth elastic effect are investigated reveal characteristic teeth. The mechanism is thus developed systematically analyze variation in ri...

Ectodermal organs, such as the tooth, salivary gland, hair, and mammary gland, develop through reciprocal epithelial-mesenchymal interactions. Tooth morphologies are defined by the crown width and tooth length (macro-morphologies), and by the number and locations of the cusp and roots (micro-morphologies). In our current study, we report that the crown width of a bioengineered molar tooth, whic...

introduction: contact sports may lead to dental injures, which may often be prevented by using mouthguards. the purpose of this study was to evaluate the prevalence of traumatic dental injuries (tdi) in professional contact sport athletes and to determine the awareness regarding use of mouthguards in this group. methods: a questionnaire containing a number of  questions regarding the demographi...

There are many instances where it is desirable to determine, at a distance, whether a subject is carrying a hidden load. Automated detection systems based on gait analysis have been proposed to detect subjects that carry hidden loads. However, very little baseline gait kinematic analysis has been performed to determine the load carriage effect while ambulating with evenly distributed (front to ...