Fig. 2

Radiographs and comparison between preoperative and intraoperative appearance. a Appearance showing different carrying angle of bilateral upper limbs and varus deformity of the right elbow. b Posteroanterior radiograph of right elbow joint showing cubitus varus deformity before operation. c Individual osteotomy navigation template matched the distal humerus well, and fixation of the navigate template with one Kirschner wire; two holes were drilled with the Kirschner wire to control rotational rectification. d Osteotomy was performed according to the navigation template surface, and the osteotomy block was completely consistent with the preoperative design. e Lateral radiograph of right elbow joint showing no extension or flexion deformity after operation. f Postoperative appearance showing correction of the deformity 10 weeks after operation. g Appearance showing correction of the deformity after operation, with no limit to the flexion and extension of the elbow joint and rotation of the forearm