INTRODUCTION Malposition of the acetabular component is recognized as a leading cause of dislocation in total hip arthroplasty [4]. Intraoperatively, the most influential surgeon-controlled variables are abduction (tilt) and anteversion (AV) of the cup. Empirically, while 30-50° of tilt and 5-25° of AV is felt to be a “safe-zone” [2], dislocation nevertheless remains a disturbingly frequent occ...
