Fig. 2From: Low femoral antetorsion as a risk factor for bony impingement after bipolar hemiarthroplastyPattern of impingement after BHA. a Bony impingement (femoral neck impinges on the AIIS). b Bony impingement (femoral shaft impinges on the ASIS) c Bony impingement (posterior aspect of greater trochanter impinges on the ischial bone). d Implant-bone impingement (implant neck—posterior part of the acetabulum)Back to article page