We present the results of Chiari pelvic osteotomy in the treatment of adolescent hip incongruence, with special interest in identifying possibilities, limitations and complications.

In a series of 86 patients treated by Chiari pelvic osteotomy (13 operated bilateraly) at the Institute for Orthopaedic Surgery “Banjica” with a follow-up period more than 48 months, we analyzed the relation of Chiari-specific parameters collected from postoperative radiograms (osteotomy angle and heigth, and displacement index) to various preoperative and postoperative parameters (Sharp acetabular angle, Wiberg CE angle, Heyman and Herndon femoral head extrusion index (FHEI), Acetabular depth ratio (ADR), Shenton-Menard arch integrity, limb length discrepancy, gait quality) and functional result according to HHS and McKay scoring systems.

We found highly significant improvements of Sharp angle (from 47.2±6.1° preoperatively to 38.6±7.8° finally, p<0.01), Wiberg CE angle (from 10.2±16.8° to 38.9±14.6°, p<0.01) and FHEI (from from 53.4±21% to 1.9±70.7%, p<0.01). In adition, HHS was also improved from 76±15.1 to final 87.9±9.4, p<0.01). We also assessed the satisfaction of both patients (index 4.2 out of 5) and surgeons (index 3.7 out of 5).

Chiari pelvic osteotomy is useful surgical procedure in the selected cases of adolescent hip incongruence with disturbance of hip centering and coverage.