Acta Orthop Traumatol Turc
The effect of tibiofemoral angle changes on the results of dome osteotomy
Abstract
Objectives: We investigated the effect of tibiofemoral angle changes on the results of dome osteotomy in patients with medial compartment osteoarthritis of the knee.
Methods: The study included 23 knees of 22 patients (15 women, 7 men; mean age 60 years; range 37 to 73 years) who underwent high tibial dome osteotomy for medial compartment osteoarthritis. A simple modified Charnley external fixator was used for stabilization of the osteotomy. Based on the Ahlback classification, 15 knees had grade I, six knees had grade II, and two knees had grade III osteoarthritis. The patients were evaluated in three groups based on the postoperative tibiofemoral angles obtained; hence, a valgus angle of less than 8˚ (4 knees), 8˚ to 12˚ (10 knees), and greater than 12˚ (9 knees). Clinical evaluations were made using the American Knee Society scoring system. The mean follow-up period was 5.4 years (range 1 to 10 years).
Results: The mean tibiofemoral angle was 4.4±2.9˚ of varus (range 0˚ to 10˚) preoperatively, and 11±3.8˚ of valgus (range 5˚ to 18˚) postoperatively. The mean correction loss at final evaluations was 2.7˚. The mean preoperative and postoperative knee scores were 37.7±15.8 (range 19 to 77) and 80.2±9.2 (range 51 to 93), respectively (p
Methods: The study included 23 knees of 22 patients (15 women, 7 men; mean age 60 years; range 37 to 73 years) who underwent high tibial dome osteotomy for medial compartment osteoarthritis. A simple modified Charnley external fixator was used for stabilization of the osteotomy. Based on the Ahlback classification, 15 knees had grade I, six knees had grade II, and two knees had grade III osteoarthritis. The patients were evaluated in three groups based on the postoperative tibiofemoral angles obtained; hence, a valgus angle of less than 8˚ (4 knees), 8˚ to 12˚ (10 knees), and greater than 12˚ (9 knees). Clinical evaluations were made using the American Knee Society scoring system. The mean follow-up period was 5.4 years (range 1 to 10 years).
Results: The mean tibiofemoral angle was 4.4±2.9˚ of varus (range 0˚ to 10˚) preoperatively, and 11±3.8˚ of valgus (range 5˚ to 18˚) postoperatively. The mean correction loss at final evaluations was 2.7˚. The mean preoperative and postoperative knee scores were 37.7±15.8 (range 19 to 77) and 80.2±9.2 (range 51 to 93), respectively (p
References
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