The relationship between hip joint space width, center edge angle and acetabular depth

Area of Science:

• Orthopedics
• Radiology
• Anthropology

Background:

• Acetabular dysplasia diagnosis relies on radiographic parameters.
• These parameters may be influenced by anthropological factors unrelated to dysplasia.
• Understanding these influences is crucial for accurate diagnosis.

Purpose of the Study:

• To investigate the relationship between minimal joint space width (JSW) and radiographic parameters of acetabular dysplasia in healthy individuals.
• To determine if anthropological characteristics affect hip dysplasia measurements.

Main Methods:

• Evaluated 118 patients without hip issues undergoing abdominal radiography.
• Manually measured minimal joint space width (JSW), center edge (CE) angle, and acetabular depth.
• Correlated these measurements with pelvic width, height, and leg length.

Main Results:

• The CE angle inversely correlated with minimal hip JSW.
• CE angle also correlated with pelvic width.
• Acetabular depth correlated with subject height and leg length, while pelvic width correlated with JSW.

Conclusions:

• Radiographic parameters for acetabular dysplasia (CE angle, acetabular depth) are associated with anthropological variables.
• CE angle is linked to minimal hip JSW.
• Patient height and limb length can affect these parameters, potentially leading to misinterpretation as abnormalities.