Fig. 1From: Comparative effects of modified rotary scarf osteotomy and traditional scarf osteotomy in treating moderate to severe hallux valgus: a retrospective cohort studyPreoperative planning. (a) Determine the center of rotation based on the preoperative 3D CT, and establish the X/Y/Z three-axis for preoperative planning. (b) The IMA angle that can be achieved after the simulated osteotomy rotationBack to article page