From April 1987 to October 1990, an uncemented unicompartmental kneearthroplasty was performed in 100 patients (81 women, 19 men) with a mean age of 69 years.The mean follow-up period was 28 months (range, 12-48). The indication for arthroplasty wasunicompartmental osteoarthritis in 91 cases, femoral necrosis in 8, and post-traumatic femoraldestruction in one. The implant used was an uncemented non-constrained design. Four patientsdied during the first 12 months after surgery. Two patients were reoperated; one hadloosening of the tibial component and the other showed dislocation of the femoral implantbackwards the tibial component. In this last patient both components were well fixed showingno signs of loosening. Out of the 94 remained cases, 90 were either asymptomatic or complainof very slight pain. Functional assessment according to Hungerford disclosed 63 points beforesurgery and 93 at review, indicating an excellent functional outcome. In the radiographic study,only one case who was reoperated showed loosening of the tibial component. In 90 of the 94patients studied, and apparent good bone ingrowth was observed at the tibial component. After2-year follow-up, the survival of the implant was found to be 98%.

From April 1987 to October 1990, an uncemented unicompartmental kneearthroplasty was performed in 100 patients (81 women, 19 men) with a mean age of 69 years.The mean follow-up period was 28 months (range, 12-48). The indication for arthroplasty wasunicompartmental osteoarthritis in 91 cases, femoral necrosis in 8, and post-traumatic femoraldestruction in one. The implant used was an uncemented non-constrained design. Four patientsdied during the first 12 months after surgery. Two patients were reoperated; one hadloosening of the tibial component and the other showed dislocation of the femoral implantbackwards the tibial component. In this last patient both components were well fixed showingno signs of loosening. Out of the 94 remained cases, 90 were either asymptomatic or complainof very slight pain. Functional assessment according to Hungerford disclosed 63 points beforesurgery and 93 at review, indicating an excellent functional outcome. In the radiographic study,only one case who was reoperated showed loosening of the tibial component. In 90 of the 94patients studied, and apparent good bone ingrowth was observed at the tibial component. After2-year follow-up, the survival of the implant was found to be 98%.