A Comparison Between a Pyrocarbon and a CoCr Shoulder Resurfacing Implant

The purpose of the study is to investigate fixation to bone and the clinical results following shoulder resurfacing arthroplasty. The study will compare results between an implant made of Cobalt-Chrome(CoCr) and an implant made in pyrocarbon.

Inclusion Criteria:

• Primary or secondary osteoarthritis of the shoulder
• Age 40-75 years
• Patient capable of giving informed consent
• Patient agrees to comply with the study plan

Exclusion Criteria:

• Destruction of the proximal humerus
• Insufficient bone stock
• Deficient rotator cuff or earlier failed surgery of the rotator cuff
• Large muscle defects or insufficient blood supply in the affected arm
• Neuromuscular disorders
• Infection, untreated malignancy or transmittable disease preventing the patient from fulfilling the study
• Patient unwilling to comply with study regulations
• Patient with earlier allergic reaction to pyrocarbon
• Patient with known metastatic disease
• Patient who has been treated with more than 10 mg corticosteroids (e.g. Prednisone) daily within 3 months from surgery.
• Patient participating in other clinical study
• Patient in need of glenoid replacement