Prospective Clinical Evaluation of ASR and ReCap Resurfacing Arthroplasty

Clinical Performance of the ASR and ReCap Resurfacing Implants-7Years Follow-Up.

This evaluation is being conducted to evaluate the performance of the ASR arthroplasty. The performance of the devices will be assessed by:

Clinical parameters: pain, function, satisfaction and complications. Blood samples: Analyse of metal ions, lymphocyte migration, lymphocyte proliferation assay and cytokines.

Biopsies: Metal ions, cytokines and histology. Biomechanics: Strength, gait analysis, range of motion. Scanning: DEXA and MRI

Inclusion Criteria:

ASA I-II,DEXA-scanning:

• lower limit for a 55 years old women,
• MRI normal
• vitality in caput
• willing to return for follow-up evaluations.

Exclusion Criteria:

• collum femoris < 2 cm
• large cysts in caput (> 1 cm)
• mismatch between caput and acetabulum
• caput necrosis
• treatment with medicine which affects bone metabolism
• impaired kidney function.