Introduction: [corrected] The aim of the study is early results evaluation of Chiari pelvic osteotomy.
Materials and methods: In the years 1997-2003 36 patients (26 women and 10 men) in the age from 16 to 50 years old were operated on because of hip joint dysplasia. The indications for operative treatment were: pain, age less than 50 years, insufficient femoral head coverage without evidence of arthritic changes on X-ray.
Results: There were no intraoperative and postoperative complications. Harris Hip Score improved from 85 points before operation (from 82 to 90 pts.) to 95 points (from 92 to 100 pts.) after operative treatment. There was pain relief in most of the patients after osteotomy. Osteotomy healing was seen on X-ray examination usually after 6-12 weeks in 33 patients. Delayed osteotomy union till 6th postoperative month without influence on clinical hip improvement was seen in 3 patients. The increase in Wiberg CE angle from average 17.2 degrees (from 3 to 33 degrees) before operation to 44.9 degrees (from 19 to 78 degrees) after operation was statistically significant p< 0.00045. There was no loss in osteotomy correction.
Conclusion: Supraacetabular osteotomy decreases pain, and increases hip function. Improvement in hip biomechanics and increase in femoral head coverage may lead to decrease in development of hip joint arthritic changes and time preserve before total hip arthroplasty.