Results and Survivorship of High Tibial Osteotomy / 대한정형외과학회잡지

ABSTRACT

PURPOSE: To determine survivorship and establish the ideal correction angle in high tibial osteotomy for primary osteoarthritis through retrospective study. MATERIALS AND METHODS: One hundred and eleven valgus osteotomies of the tibia were performed in seventy-nine patients from 1985 to 1997. The average follow-up period was 9 year 6 months (range, 2.4 to 14.1 years). Failure I was defined as the need for conversion of a high tibial osteotomy to a total knee arthroplasty, and Failure II as the need for conversion or in a patient with less than 60 HSS knee score points. The probability of survival was estimated using the Kaplan-Meier survivorship method. RESULTS: The HSS knee score averaged 60 points preoperatively, 94 points at the 1 year follow-up and 87 points at the last followup. The 4 year and 14 year survival rates were 99% and 85.0% using the first definition of failure, and 96.4% and 75.1% using the second. CONCLUSION: High tibial osteotomy is a reliable method for treating unicompartmental osteoarthrtis, provided that the postoperative femorotibial angle is corrected by more than 7degrees of valgus.