Mid-term clinical results of total hip arthroplasty using a Wagner standard cup for dysplastic hip.

Background: The outcome of cementless total hip arthroplasty depends on many factors. We must not forget fundamental things those are design of outer surface of the component, that leads bone ingrowth into the prosthesis, better initial stability, and better insertional techniques. The purpose of this study was to review our experience with metal-on-metal total hip arthroplasty with a Wagner standard cup for patients who had acetabular dysplasia.

Chromium level of salvaged blood in patients undergoing revision hip arthroplasty.

PURPOSE. To evaluate the chromium level of the salvaged blood in patients undergoing revision total hip arthroplasty (THA). METHODS.

Rotational acetabular osteotomy for osteonecrosis of the femoral head after intracapsular fracture of the neck of the femur.

The treatment of osteonecrosis of the femoral head in younger patients varies among orthopaedic surgeons. In particular, the optimal treatment of extensive osteonecrosis associated with femoral head collapse remains controversial. Since 1995, we have performed rotational acetabular osteotomy on 70 hips, including those of 3 patients with extensive osteonecrosis of the femoral head after intracapsular fracture of the neck of the femur.

Fibroma of the tendon sheath that expanded into the radiocarpal joint with bony involvement.

We present a 46-year-old man with a fibroma of the tendon sheath of the left radiocarpal joint and bony involvement of the scaphoid and the radial styloid. Bony involvement of a fibroma of the tendon sheath is rare and has been reported only four times to our knowledge.

Original methods to move femoral head medially and caudally after rotational acetabular osteotomy: especially to use ceramic spacer.

The operative procedures chosen to treat arthrosis in patients with severe acetabular dysplasia vary among orthopaedic surgeons, particularly in younger patients. We operated on 450 hips with acetabular dysplasia by using the rotational acetabular osteotomy (RAO) method of Ninomiya and Tagawa by Ninomiya (Clin Orthop 247:127-137, 1989). In this report, we describe our technique of performing RAO with hydroxyapatite tricalcium phosphate-composite (HAP-TCP) blocks to achieve good acetabular coverage and the results of this procedure in 16 hips with severe dysplasia, including nine with advanced arthrosis.

Chronological changes of serum chromium levels after modern metal-on-metal total hip arthroplasty.

We determined changes in serum chromium concentration every 6 months up to 3 years after implantation in 44 patients (mean age 63 (49-79) years, 35 women) who underwent modern metal-on-metal total hip arthroplasty (Metasul). The serum chromium levels increased between the first and second year after implantation (1 year: 1.05 (SD 0.