Acetabular development in congenital dislocation on the hip.

Area of Science:

• Orthopedics
• Pediatric Orthopedics
• Developmental Orthopedics

Background:

• Acetabular dysplasia is a frequent complication following treatment for congenital dislocation of the hip (CDH).
• Delayed diagnosis of CDH can impact acetabular development and treatment outcomes.
• Understanding factors influencing acetabular remodeling is crucial for long-term hip health.

Purpose of the Study:

• To analyze acetabular development in children with CDH and delayed diagnosis.
• To compare acetabular development based on the type of hip reduction (closed vs. open).
• To investigate the relationship between acetabular dysplasia, avascular necrosis (AN), and acetabular index (AI) post-treatment.

Main Methods:

• Retrospective analysis of 47 children (55 CDH cases) with delayed diagnosis.
• Classification of cases based on reduction type: closed (Group 1) and open (Group 2).
• Assessment of acetabular development using the acetabular index (AI), with >25 degrees indicating dysplasia after two years.

Main Results:

• Open reduction resulted in better acetabular development compared to closed reduction in CDH.
• Acetabular remodeling was less favorable in hips with avascular necrosis (AN) post-reduction.
• The acetabular index (AI) showed progressive improvement during CDH treatment, most notably in the first year post-reduction.

Conclusions:

• Open reduction is associated with superior acetabular development in CDH treatment.
• Avascular necrosis (AN) hinders acetabular remodeling following hip reduction.
• Early and effective management of CDH promotes favorable acetabular development and improves the acetabular index (AI).