Acetabular reconstruction with Chiari pelvic osteotomy: report of 2 cases.

We performed cementless total hip arthroplasty combined with acetabular reconstruction with Chiari pelvic osteotomy on 3 hips in 2 patients. This procedure increased the osseous coverage of the shell and decreased the load around the hip by medialization of the hip center. Osteosynthesis of the proximal and distal bone fragment was performed using a shell with screws.

Contrast-enhanced MR imaging of subchondral insufficiency fracture of the femoral head: a preliminary comparison with that of osteonecrosis of the femoral head.

Introduction: Subchondral insufficiency fracture of the femoral head (SIF) may be confused with osteonecrosis of the femoral head (ON) due to clinical and imaging similarities.

Materials And Methods: Contrast-enhanced MR images in patients with SIF (ten hips in ten patients) were retrospectively reviewed and compared with those from patients with ON (ten hips in six patients).

Results: Low-signal intensity bands on T1-weighted images were present within the femoral head in all hips examined.

Short-term wear of Japanese highly cross-linked polyethylene in cementless THA.

Introduction: Production of polyethylene wear from acetabular liners is thought, in part, to mediate the periprosthetic osteolysis. This study examined the in vivo wear performance of Japanese highly cross-linked polyethylene (Aeonian) in cementless total hip arthroplasty.

Materials And Methods: Ninety-five hips received a highly cross-linked polyethylene liner, while 20 hips were implanted with conventional polyethylene.

A subchondral fracture in transient osteoporosis of the hip.

Although subchondral changes are reported to be associated with transient osteoporosis of the hip (TOH), the etiology of this disorder is unknown.In this paper, we describe a 45-year-old man with TOH who underwent both MRI and CT examinations. Plain radiographs obtained 2 months after the onset of hip pain showed a focal loss of radiodensity in the left femoral head.