BACKGROUND Preclinical durability testing of hip replacement implants is standardised by ISO-14242-1 (2002) which is based on historical inverse dynamics analysis using data obtained from a small sample of normal healthy individuals. It has not been established whether loading cycles derived from normal healthy individuals are representative of loading cycles occurring in patients following tot...

Computer-assisted surgery (CAS) has been introduced in hip replacement to improve the precision of the acetabular and femoral components and hopefully to improve prosthesis longevity and biomechanics. Likewise the concept of shorter “neck-sparing” femoral stems has been gaining in popularity. These new designs preserve more native bone in the femoral neck of the patient during femoral preparati...