Racial and geographic differences of Wiberg's angle from 400 ultrasonographic normal hips in Italian and Brazilian...

Area of Science:

• Pediatric Orthopedics
• Medical Imaging
• Comparative Anatomy

Background:

• Hip sonography is crucial for assessing infant hip joint development.
• Graf's classification is a standard for evaluating hip joint normality ultrasonographically.
• The Wiberg center edge angle (CEA) is a key metric for acetabular development.

Purpose of the Study:

• To compare the acetabular roof complex conformation between Brazilian and Italian infants using CEA.
• To validate a novel methodology for CEA measurement in infant hip sonographies.
• To establish normative data for CEA in healthy infants from different ethnic backgrounds.

Main Methods:

• Sonographic hip evaluations were performed on 200 infants (100 Brazilian, 100 Italian), aged 15-90 days.
• Infants with normal hip joints (Graf type 1a and 1b) were included.
• A custom-developed graphic computer program was used for precise Wiberg center edge angle (CEA) measurements.

Main Results:

• Statistical analysis revealed a significantly better conformation of the acetabular roof complex in Brazilian infants compared to Italian infants.
• The developed methodology for CEA measurement proved effective and consistent.
• No significant differences were noted in infant age or hip joint normality classification between the groups.

Conclusions:

• Infant hip development, specifically acetabular roof conformation, may exhibit ethnic variations.
• The Wiberg center edge angle (CEA) is a reliable indicator for detecting subtle differences in acetabular development.
• Further research is warranted to explore the implications of these findings for early diagnosis and treatment of hip dysplasia.