The final implant position of a commonly used collarless straight tapered stem design (CorailSuperscript??/Superscript) does not correlate with femoral neck resection height in cement-free total hip arthroplasty: a retrospective computed tomography analysis

摘要

BackgroundIn total hip arthroplasty, inadequate femoral component positioning can be associated with instability, impingement and component wear and subsequently with patient dissatisfaction. In this study, we investigated the influence of femoral neck resection height on the final three-dimensional position of a collarless straight tapered stem (Corail??). We asked two questionsa??(1) is neck resection height correlated with version, tilt, and varus/valgus alignment of the femoral component, and (2) dependent on the resection height of the femoral neck, which area of the stem comes into contact with the femoral cortical bone?