The Salter innominate osteotomy does not lead to acetabular retroversion

Area of Science:

• Orthopedic Surgery
• Pediatric Orthopedics
• Radiology

Background:

• Developmental dysplasia of the hip (DDH) is a condition requiring surgical intervention in some cases.
• Salter's innominate osteotomy is a surgical procedure used to correct DDH by improving acetabular coverage.
• Concerns exist that this osteotomy may cause acetabular retroversion, potentially leading to complications.

Purpose of the Study:

• To investigate whether Salter's innominate osteotomy causes acetabular retroversion postoperatively or at long-term follow-up in pediatric patients with DDH.
• To evaluate the long-term effects of the osteotomy on acetabular version.

Main Methods:

• Retrospective review of 92 pediatric patients who underwent unilateral Salter innominate osteotomy for DDH.
• Utilized a novel CT-based technique to measure acetabular version, comparing operated hips with contralateral control hips.
• Assessed acetabular version on postoperative CT scans and follow-up radiographic imaging.

Main Results:

• No incidence of acetabular retroversion was observed in the operated hips immediately postoperatively or at follow-up.
• A statistically significant increase in acetabular anteversion was found in hips that underwent osteotomy compared to control hips (P < 0.001).
• The novel CT measurement technique for acetabular version was found to be repeatable and adjusted for pelvic tilt.

Conclusions:

• Salter's innominate osteotomy does not induce acetabular retroversion in children with DDH.
• The procedure appears to increase acetabular anteversion, contrary to previous concerns.
• This study validates a new CT-based method for accurate acetabular version measurement in DDH patients.