Fig. 1From: Proximal femoral anatomy and collared stems in hip arthroplasty: is a single collar size sufficient? a Immediate post-operative and b 2 months post-operative X-rays of a right hip after total hip arthroplasty with insufficient collar size, showing slight subsidence with signs of calcar fracture. c Post-operative X-ray of a left hip illustrating an oversized collar, which may cause impingement on surrounding soft tissuesBack to article page