Correlation of height and acetabular morphology in adults with Crowe Ⅳ type developmental dysplasia of hip

Objective To analyze the correlation of height and acetabular morphology in adults with Crowe typeⅣdevelopmental dysplasia of hip (DDH). Methods From April 2014 to May 2015, 2 males (2 hips) and 13 females (19 hips) with an average age of (25±7.2) years old who were diagnosed as Crowe typeⅣ developmental dysplasia and had undergone total hip arthroplasty (THA) surgery in Chinese PLA General Hospital were enrolled in this study. Through standard hip X-ray and CT, the correlation of pelvic height, true acetabular anterior-posterior diameter, acetabular depth, medial wall thickness and bone stock of posterior columns was analyzed and measured. Results There was a positive correlation between height and pelvic height (r=0.723, P=0.000). No statistically significant difference was found in the correlation of height and anterior-posterior diameter (r=0.049, P=0.834), medial wall thickness (r=0.395, P=0.076), acetabular depth (r=0.205, P=0.373), bone stock of posterior columns (r=0.152, P=0.511), diameter of acetabular component (r=0.010, P=0.966). Conclusion Height is positively correlated with pelvic height in patients with Crowe typeⅣDDH. However, it is not related with acetabular morphology and bone stock of posterior columns. There are small differences between different statural patients in acetabular morphology.