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Relationship between developmental dislocation of the hip in infant and acetabular dysplasia at skeletal maturity

Kunihiko Okano1, Kazumasa Yamaguchi, Yoshikazu Ninomiya

  • 1Department of Orthopaedic Surgery, Nagasaki Prefectural Center of Medicine and Welfare for Children, Isahaya, Japan (KO, KY, YN, SM); Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan (KA); Department of Orthopedic Surgery, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan (MO); Enomoto Orthopaedic Clinic, Nagasaki, Japan (HE); and Takahashi Orthopedic Clinic, Nagasaki, Japan (KT).

Medicine
|January 9, 2015
PubMed

Insights

Acetabular dysplasia (AD) often persists after developmental dislocation of hip (DDH) treatment in infancy. This study found a correlation between AD severity and DDH history, suggesting distinct AD characteristics based on DDH background.

Area of Science:

  • Orthopedics
  • Genetics
  • Radiology

Background:

  • Developmental dislocation of hip (DDH) treatment in infancy can lead to residual acetabular dysplasia (AD) at skeletal maturity.
  • Acetabular dysplasia (AD) is associated with pelvic morphology abnormalities, spinal anomalies, and high bone mineral density, suggesting a genetic component.
  • The relationship between AD and DDH, particularly concerning hip pain and treatment history, requires further investigation.

Purpose of the Study:

  • To examine the percentage of acetabular dysplasia (AD) patients with hip pain at skeletal maturity who have a history of developmental dislocation of hip (DDH) treatment in infancy.
  • To investigate the correlation between the severity of AD at skeletal maturity and the history of DDH treatment.
  • To explore the potential distinct characteristics of AD in patients with and without a history of DDH.

Main Methods:

  • Radiographic examination of 245 patients (226 women, 19 men; mean age 40.7 years) to assess for a history of DDH treatment in infancy.
  • Classification of patients into a DDH group (88 patients, 36%) and a non-DDH group (157 patients, 64%).
  • Analysis of demographic data, acetabular morphology (using terms like CE, acetabular angle, and acetabular roof angle), and correlation with DDH history and AD severity.

Main Results:

  • A significant association was found between the severity of AD and a history of DDH treatment.
  • The DDH group exhibited a lower average age and a larger acetabular angle compared to the non-DDH group.
  • A notable trend showed increasing DDH patient percentages correlating with greater AD severity (CE, acetabular angle, acetabular roof angle).

Conclusions:

  • The study suggests that acetabular dysplasia (AD) can occur in patients without a history of developmental dislocation of hip (DDH).
  • AD in patients without a DDH history may possess different characteristics compared to those with a DDH background.
  • Further research is warranted to elucidate the distinct etiologies and clinical implications of AD in these two patient groups.

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