A new minimal-invasive approach for total hip replacement in sheep.

Background: Over the last 50 years arthroplasty became the gold-standard treatment for disabling conditions of the coxofemoral joint. Variations of anterior, lateral, and dorsal incision have been applied, but as each approach requires the incision and reflection of various muscles to gain adequate exposure of the joint results are still controversial.

Objective: The purpose of this study was to develop a minimal-invasive, tissue-sparing approach in sheep with reduced risks in animal testing.

Sympathetic dysfunction in long-term complex regional pain syndrome.

Objective: Malfunction of the sympathetic nervous system (SNS) is common in early complex regional pain syndrome type I (CRPS I). This study was designed to evaluate the function of the SNS in patients with chronic CRPS I and to correlate the obtained data with hand function measurements.

Materials And Methods: Thirty-two patients of both the sexes in whom the diagnosis of CRPS I of the upper extremity had been established for at least 3 years before they were included in the study.

Proximal loading of the femur leads to low subsidence rates: first clinical results of the CR-stem.

Introduction: A new femoral stem was developed with a design that leads to compression of cancellous bone in the calcar region which results in proximal loading. The cross-sectional design of the implant provides rotational stability.

Materials And Methods: In the first clinical investigation ten patients underwent uncemented total hip arthroplasty between January 1999 and May 1999 using the CR-stem((R)) (Implantcast GmbH, Buxtehude, Germany).

Repair of osteochondral defects in the knee by resorbable bioimplants in a rabbit model.

Background: The intrinsic healing capacity of articular cartilage remains poor, despite various attempts that have been undertaken to treat cartilage defects. This study describes the experimental use of a double-layer bioimplant consisting of a bone-substitute layer and a cartilage-substitute layer.

Animals And Methods: In group A, 12 implants were placed into osteochondral defects of the load-bearing area of rabbit femoral condyles.

The influence of the implant size on the outcome of unconstrained total knee arthroplasty.

Introduction: The influence of implant size on the results in unconstrained total knee arthroplasty has never been investigated before.

Patients And Methods: 133 patients with unconstrained total knee arthroplasty were examined (HSS Score, Knee Society Score) with consideration of the different sizes of femoral and tibial components and the thicknesses of the tibial inlays. The medium follow up was 41.