Long-term results after modified Steel´s triple pelvic osteotomy

Area of Science:

• Orthopedic Surgery
• Hip Preservation Surgery
• Acetabular Dysplasia Treatment

Background:

• Acetabular dysplasia often necessitates hip preservation surgery to prevent early-onset osteoarthritis.
• Redirectional osteotomies aim to improve acetabular coverage and delay total hip arthroplasty (THA).
• Steel's triple pelvic osteotomy (TPO) is a surgical technique for treating hip dysplasia.

Purpose of the Study:

• To evaluate the long-term efficacy of modified Steel's triple pelvic osteotomy (TPO).
• To determine if TPO remains a viable option compared to other redirectional osteotomies.
• To assess TPO's ability to delay the need for total hip arthroplasty (THA).

Main Methods:

• Retrospective review of 317 modified Steel's TPO procedures performed between 1985 and 2012.
• Long-term follow-up included Harris hip scores (HHS), nonarthritic hip scores (nAHS), and radiological assessment (LCE angle, acetabular version).
• Statistical analysis using paired t-test to compare pre- and post-operative outcomes.

Main Results:

• Of 68 hips evaluated at a mean 18.5-year follow-up, 27 achieved excellent/good HHS and 24 achieved excellent/good nAHS.
• 12 patients (3.8%) ultimately required THA.
• Radiologically, LCE angle improved (12° to 34°) and Sharp-Ulmann angle improved (49° to 36°); 24 patients showed signs of retroversion.
• Non-union occurred in 5 patients, representing the most frequent complication.

Conclusions:

• Modified Steel's TPO is a safe and effective hip joint preservation technique.
• The procedure can successfully delay the need for total hip arthroplasty (THA) in patients with hip dysplasia.
• While effective, TPO involves a longer recovery period and potentially lower patient satisfaction compared to THA.