Early Postoperative Femur Fracture After Uncemented Collarless Primary Total Hip Arthroplasty: Characterization and Results of Treatment.

Thirty Vancouver type B periprosthetic fractures occurred within 90 days of total hip arthroplasty were identified using two institutional databases. Twenty-eight of these fractures were of a stereotyped fracture pattern consisting of a displaced fracture of the femoral neck including the lesser trochanter and a variable amount of the proximal medial femoral cortex creating a roughly triangular fragment. Time from operation until fracture was 2-88 days (mean 28).

Metal-on-metal hip arthroplasty does equally well in osteonecrosis and osteoarthritis.

Many previous reports suggest total hip arthroplasty performs suboptimally in young patients with osteonecrosis. We retrospectively compared the performance of metal-on-metal articulation in a select group of 107 patients with 112 hips (98 uncemented and 14 cemented stems) 60 years of age or younger with either osteonecrosis (27 patients, 30 hips) or primary osteoarthritis (80 patients, 82 hips). We evaluated all patients with patient-generated Harris hip score forms and serial radiographs.