Prediction of taper performance using quasi static FE models: The influence of loading, taper clearance and trunnion length.

摘要: The head-neck taper junction has been widely reported to corrode leading adverse tissue reactions. Taper corrosion is a poorly understood phenomenon but associated with oxide layer damage and ingress of corrosive physiological fluids. Micromotion may the layer; although little about prevailing stresses which cause this. fluid around joint space into will depend on contact position separation interfaces during loading. current work reports effect clearances trunnion length surface gap opening. These were determined for CoCr/Ti using FE under loading conditions including walking stair climb as well hip simulator load profiles. Shorter trunnions shown generate greatest gaps (82 µm) also largest (1200 MPa) head taper. smaller areas. Clearances within ±0.1° had no generated, tapers engaged over comparable lengths; opening was dependent upon engagement rather than location (proximal or distal) contact. profile variants applied by simulators, insufficient differentiate between designs evaluate differences in magnitudes gaps. use more demanding activity such vitro evaluations could provide better predictions performance vivo. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 107B: 138-148, 2019.