A Long Term Follow-Up Study of High Tibial Osteotomy in Medial Osteoarthritis of the Knee

• Published in: Orthopedics & Traumatology Vol. 45; no. 2; pp. 401 - 404
• Main Authors: Takita, Toshihiko, Otsuki, Kenji, Nakadera, Takashi, Takahashi, Toshiaki, Murakami, Katsuhiko
• Format: Journal Article
• Language: English
• Published: West-Japanese Society of Orthopedics & Traumatology 1996
• Subjects: High tibial osteotomy; Long term results; Medial osteoarthritis of the knee
• ISSN: 0037-1033; 1349-4333
• DOI: 10.5035/nishiseisai.45.401

Fifty-seven knees in 41 patients with medial osteoarthritis treated by high tibial osteotomy (HTO) were clinically reviewed. Average age of patients was 66.7 years. Patients were evaluated from 5 to 15 years postoperatively (mean, 8.5 years). Clinical results were satisfactory in 85% of the knees at the five year follow-up evaluation and in 81% at last follow-up evaluation. Two knees required TKA after 11 and 12 years. The femorotibial angle (FTA) at one year and last follow-up significantly correlated with the last clinical score and improvement score. FTA one year after surgery was one of the main factors that influenced long term results. The mean FTA immediately after surgery was 168.4° in patients who had an excellent improvement score. The change of FTA after surgery was minimum in patients who were corrected to nearly 170°. Clinical results were satisfactory even in the elderly over 70 years old.