Osteochondrosis dissecans of the medial malleolus: a case report.

Osteochondrosis dissecans of the ankle accounts for approximately 4% of all osteochondrosis dissecans. Most osteochondrosis dissecans in the ankle is found in the talar dome. We report the case of osteochondrosis dissecans of the medial malleolus in a 46-year-old patient which has not been described yet.

Financing in knee arthroplasty: a benchmarking analysis.

Introduction: Flat rate payment and "diagnosis related groups" (DRG) in knee arthroplasty offer incentives to save expenses. A cost-benefit analysis exactly compares all expenses to revenues. This requires patient-related assessment of treatment costs in terms of cost-unit accounting.

Fractures of cementless thin-walled cups.

Cementless threaded cups are commonly used in total hip arthroplasty. A method to match the elasticity of the cup to that of natural bone is reducing the wall thickness of the implant. Despite good results with this philosophy of implantation, we recently observed 3 cases of implant fractures after the implantation of such thin-walled cups called "Bicon.

How does soft tissue distribution affect anteversion accuracy of the palpation procedure in image-free acetabular cup navigation? An ultrasonographic assessment.

Navigation of the acetabular cup in total hip replacement (THR) is used to improve the reproducibility of acetabular component positioning. When the palpation of anatomic landmarks, which is necessary to determine the pelvic coordinate system, is performed epicutaneously, the question as to how uneven soft tissue distribution can influence navigation accuracy arises. To obtain data, the questionable soft tissue thickness was measured in 72 patients scheduled for THR.

Successful hip arthroplasty using cementless titanium implants in rheumatoid arthritis.

Over a period of eight years, we implanted a total of 76 cementless hip prostheses in patients with rheumatoid arthritis. The clinical results of 47 patients (70 hips) increased from a mean Harris Hip Score of 33 to 85 after an average of 49 months (range 1-11 years). One threaded cup has had to be revised because of loosening, and one stem because of femoral fracture.