Risk factors for failure after open reduction for DDH: a matched cohort analysis.

Area of Science:

• Orthopedic Surgery
• Pediatric Orthopedics
• Hip Dysplasia Research

Background:

• Limited controlled data exists on risk factors for redislocation following open reduction for developmental dysplasia of the hip (DDH).
• Understanding these factors is crucial for improving surgical outcomes and reducing the need for revision surgery.

Purpose of the Study:

• To identify predictors of redislocation after open reduction for DDH.
• To evaluate the long-term outcomes of patients requiring revision surgery for hip redislocation.

Main Methods:

• Retrospective match-controlled study comparing 22 patients with redislocation and 22 controls.
• Radiographic parameters (acetabular index, pelvic width, abduction angle, etc.) were analyzed.
• Statistical analysis included t tests, logistic regression, and Fisher exact tests.

Main Results:

• Redislocation occurred in 5.9% of patients (25/421) at a mean of 124 days post-surgery.
• Right-sided or bilateral DDH, wider pelvic width, and lower abduction angle in the spica cast were significant risk factors for redislocation.
• Dysmorphic femoral head and abnormal femoral version were identified as common reasons for failure during revision surgery.

Conclusions:

• Right-sided/bilateral DDH, increased pelvic width, and decreased spica cast abduction are significant risk factors for redislocation.
• Abnormal femoral version and femoral head dysplasia are suspected contributors to redislocation, warranting further investigation.