The purpose of the prospective study was to evaluate the minimum fifteen year follow-up of prospective total knee arthroplasties performed in patients younger than fifty years of age with osteoarthritis, using fixed- and mobile-bearing knee prostheses in the same patients, to compare

1. functional scores
2. rates of radiographic failure
3. revision rates
4. survivorship

The randomized prospective comparison of fixed- and mobile-bearing total knee designs in the same patients younger than fifty years of age is limited. The purpose of this study was to compare the long-term clinical and radiographic results of fixed- and mobile-bearing total knee arthroplasties in patients younger than fifty years of age with osteoarthritis.

Inclusion Criteria:

• End-stage osteoarthritis of the knee joint requiring total knee arthroplasty with bilateral disease

Exclusion Criteria:

• Inflammatory disease
• Patient with other Lower extremity disease which may affect functional outcome
• Neurologic disease effecting patients lower extremity
• Revision surgery
• Patient not medically cleared for bilateral surgery