Comparison of the Short Time Outcomes of Geno Varum Correcting Surgery between the Open Wedge and Dome Shape High Tibial Osteotomies

Backgrounds and

Deformity of the knee associated with Osteoarthritis (OA) is a common presenting complaint in the orthopedic surgeries. The High Tibial Osteotomy (HTO) includes open wedge osteotomy and dome shaped wedge osteotomy. The aim of this study was to comparing the results of two osteotomy methods conducted on patients with geno varus deformity.

In a cohort study، 30 patients with genu varus deformity were studied. They were divided into two groups: Patients treated with open wedge osteotomy and dome shaped osteotomy. They were followed for six month.

Incidence of complication after operation in open wedge and dome shaped osteotomy were 6 (40%) and 4 (26. 7%)، respectively. The main complication in open wedge was intraarticular fracture while limb length discrepancy and in closed wedge was peroneal nerve Paralysis، a nonunion and two cases with no correction angle. There was no significant difference in operation time، time of weight bearing between two groups. Mean of the varus deformity in dome shaped was 12. 7 degree and in open wedge was 9. 3 degree. Functional scoring according to the Lysholm and the Tegner Activity score did not differed significantly and Insall Salvati Index was after dome shaped and open wedge osteotomy.

Opening wedge osteotomy and dome shape treatments of proximal tibial had favorable results and similarly final function. But the dome-shaped osteotomy is simple and useful in cases with unilateral involvement with sever varus deformity.