Document Type : Research articles


1 Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran

2 Students, Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran


Background: Osteoarthritis (OA) is a highly prevalent chronic degenerative joint disease with different risk factors, which need to be investigated in order to perform more appropriate interventions in earlier phases of Osteoarthritis.
Objectives: Therefore, the aim of this study was to determine the correlation between hip morphology and hip Osteoarthritis. Methods: This cross-sectional study was conducted on patients aged 15 to 60 years old with hip problems, diagnosed with hip Os- teoarthritis, compared with healthy individuals as the control group. Then radiographic parameters, such as alpha angle, acetabular angle of sharp (AA), lateral center-edge angle (LCEA), femoral neck-shaft angle (FNA), coxa profunda, acetabular protrusio, crossover sign, posterior wall sign, and the ischial sign were measured by pelvic (AP) X-ray, using PACS systems in both groups. Results: This study found that alpha angle and AA were significantly greater in OA patients as compared to healthy individuals (P < 0.001). Furthermore, LCEA was significantly greater in the Osteoarthritis group on the left side as compared to the control group (38.93 ± 8.43 versus 36.81 ± 4.74, P = 0.042) yet LCEA on the right side and total amount were not different between the two
groups (P>0.05). By grouping studied angles, it was found that the frequency of alpha angle > 55°, AA > 38°, and LCEA > 40° were significantly higher in the OA group as compared to the control group (P < 0.05). Furthermore, the researchers observed that the fre- quency of acetabular protrusio (P = 0.013) and posterior wall sign were significantly higher in the OA group as compared to healthy individuals (P < 0.05). Conclusions: The current results showed that the higher Body Mass Index (BMI), greater alpha and acetabular angles, sharp, lateral center-edge angle center-edge angle, the higher rate of a posterior wall sign, and acetabular protrusio increased the risk of OA, which support that these structural changes are major contributors to OA development.