Research Paper: Anthropometric Study of Hip Joint in Tehran Population Using Computed Tomography Scan

Introduction: Anthropometric studies provide valuable information in different populations. This study was conducted to evaluate the anatomical variations of the normal hip joint among Tehran population, Iran, in comparison with other populations. Methods: This study was carried out on hip joint of 260 patients in all ages and both genders referred to the Department of Radiology at Ebn-e Sina Hospital, Tehran, Iran between April 2014 to September 2015. The average age of the patients was 42 years. To perform the anthropometric calculations, a topogram scan and an axial view of the patient’s hip joint were taken using multi-slice CT scan device. Parameters of center edge angle, neck shaft angle, acetabular angle, and acetabular depth were measured in all patients. The patients with center edge angle less than 20 degrees were marked as dysplastic patients and excluded from the study. Results: The mean center edge angle of the patients was 32 degrees and their mean neck shaft angle was 139.5 degrees. In this study, the mean patients’ acetabular angle and depth was 37.1 degrees and 1.67 cm, respectively. The neck shaft angle in women was 2.5 degrees more than that in men. Other parameters showed no significant differences between men and women. Conclusion: Comparison of the present results with the findings of other studies indicates differences in some parameters among various populations. The mean neck shaft angle in our study was about 6 to 7 degrees more than that in other populations. The parameters of center edge angle, acetabular angle, and acetabular depth were approximately equal to the results of other studies.