The incidence of stress fracture following peri-acetabular osteotomy

• DOI: 10.1302/0301-620x.97b1.34525
• Publication Date: 2015-01-07T23:06:53Z
• Authors: A. Malviya; W. Dandachli; Z. Beech; M. J. Bankes; J. D. Witt
• Keywords: Stress Fractures; Acetabular fracture; Ischium

Stress fractures occurring in the pubis and ischium after peri-acetabular osteotomy (PAO) are not well recognised, with a reported incidence of 2% to 3%. The purpose this study was analyse stress fracture Bernese PAO under care two high-volume surgeons. included 359 patients (48 men, 311 women) operated on at mean age 31.1 years (15 56), follow-up 26 months (6 64). Complete radiographs were available for 348 patients, 64 whom (18.4%) developed inferior pubic ramus, which noted 9.1 weeks (5 55) surgery. Most (58; 91%) healed. In 40 (62.5%), nonunion also occurred. Those significantly older (mean 33.9 (16 50) vs 30.5 p = 0.002) had more pre-operative deformity: centre-edge angle (9.8° (-9.5 35) 12.4° (-33 28), 0.04) Tönnis (22.8° (0 45) 18.7° (-2 38), < 0.001). rate higher those (62.5% 7%, 0.001), regression analysis revealing that these 11.8 times risk than without nonunion.