Osteotomy angle to the femoral neck axis affects the postoperative intact ratio in curved varus osteotomy for osteonecrosis of the femoral head.

ABSTRACT: Curved varus osteotomy (CVO) is a surgical option to preserve a hip joint affected by osteonecrosis of the femoral head (ONFH). Femoral anteversion varies among patients; however, the osteotomy design on the axial plane in CVO has not been well investigated. This study evaluated the variation in the osteotomy angle on the axial plane in a CVO and its effect on the postoperative intact ratio, which determines the postoperative outcome. This study included 10 patients with Type C1 ONFH who underwent CVO according to the Japanese Investigation Committee classification. The osteotomy angles relative to the posterior condylar and femoral neck axes on the axial plane were measured on postoperative computed tomography images. The progression of collapse and osteoarthritic change were reviewed on

SUBMITTER: Kutsuna T 

PROVIDER: S-EPMC12461204 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature