[Results of tibial valgus osteotomy for internal femoro-tibial arthritis with an average 8-year follow-up].

One hundred and eighteen knees treated by valgus osteotomy for medial femorotibial osteoarthritis were reviewed with an average follow-up of 8 years (2-23 years). Seventy-four percent of the results were good and excellent after 5 years, 64% at 10 years and 61% after 10 years. The best results were observed in patients younger than 60 years, with femorotibial osteoarthritis not exceeding grade II of Ahlback's classification, and moderate femoropatellar osteoarthritis. The optimal final valgus observed was between 3 and 10 degrees. Four knees have been reoperated by arthroplasty.