Role Of Torque Research Articles

Biomechanical Evaluation of Recurrent Dissociation of Modular Humeral Prostheses.

The purpose of the study was to evaluate the force and torque required to dissociate a humeral head from the unimplanted modular total shoulder replacement system from different manufacturers and to determine if load and torque to dissociation are reduced in the presence of bodily fluids. Impingement, taper contamination, lack of compressive forces, and interference of taper fixation by the proximal humerus have all been reported as possible causes for dissociation. Experimental values determined in this research were compared with literature estimates of dissociation force of the humeral head under various conditions to gain more understanding of the causes of recurrent dissociations of the humeral head. This study examined biomechanical properties under dry and wet conditions under clinically practiced methods. Mean load to dissociation (1513 N ± 508 N) was found to be greater than that exerted by the activities of daily living (578 N) for all implants studied. The mean torque to dissociation was (49.77 N·m ± 19.07 N·m). Analysis of R2 correlation coefficients and p-values (α = 0.05) did not show any significant correlation between dry/bovine, dry/wet, or wet/bovine for load, displacement, or torsional stiffness in the majority of tests performed. Wetting the taper with water or bovine serum did not reduce the dissociation force to a statistically significant degree. Torque and lack of compressive forces at the rotator cuff may be the cause of dissociation at values less than those of activities of daily living. Torque data are provided by this study, but further research is needed to fully appreciate the role of torque in recurrent dissociations.

The Role of Torque and Rotational Kinetic Energy to Perform Pike Sole Circle Backward to Handstand on Uneven Bars as an Indicator for Some of Simultaneous Exercises

The Role of Torque and Rotational Kinetic Energy to Perform Pike Sole Circle Backward to Handstand on Uneven Bars as an Indicator for Some of Simultaneous Exercises

Synthesising the roles of torque and sensation in pinch force: a framework

Although studies show that torque and sensation are important factors to consider in grip force, there appears to be few frameworks that focus on their roles in pinch force. This study proposes a framework that potentially explains the roles of torque and sensation in pinch force. A review was done on these factors followed by a literature synthesis which categorised them into sub-factors. The sub-factors were combined to output a framework that explains the mechanisms of their interactions. This framework enriches the knowledge on pinch force levels for reduced injury risks by identifying preliminary factors that may influence pinch force. It can potentially be used to improve the effectiveness of manufacturing tasks. Although further research on it is required, it still provides researchers with more factors to consider for studies on occupational risks and injuries. With this framework, researchers can potentially improve predictions on functional outcomes in precision manufacturing tasks.

The role of torque, torsion, and bending in prosthodontic failures

The effects of torque, torsion, and bending on teeth and the supporting structures were analyzed. The physical properties of dental materials and structures determine the success or failure of dental restorations. All dental structures and materials must be used within their proportional limits of elasticity. Unless the principles of mechanics acceptable to engineering practice are observed in applying and resisting loads on dental fabrications, failure of the foundation is likely. The kinematics of dental restorations determines cavity preparation. Important principles of cavity preparation stem from this study. Unless advantage is taken of this knowledge, failure of the abutments is likely.