Morphometry and Significance of Collodiaphyseal Angle among Bini Tribe in Southern Nigeria

Abstract

Introduction: The collodiaphyseal angle (CDA) is an angle formed between the femoral neck and femoral shaft axes. It is a vital determinant of femoral neck fracture as narrower angle is often used as a predictor of stress fracture. It is also important in orthopedic treatment planning, especially hip replacement surgery. Aim: This study was carried out to evaluate the CDA values among the Bini tribe and elucidate its significance. Methodology: This study employed 200 anterior-posterior pelvic radiographs of the Bini tribe (100 males and 100 females) aged between 25 and 55 years obtained from selected radiological diagnostic centers in Benin City, Nigeria, after obtaining the Institutional Ethical Approval. They were used to evaluate the right and left CDA as an angle formed by intersection of the femoral neck and shaft axes and measured using the goniometer. Data were statistically analyzed using IBM-SPSS (version 20) with the mean, standard deviation, and range evaluated, and side and gender comparisons were done using t-test, and P < 0.05 was set as statistically significant level. Results: The average CDA was 135.56° ± 5.75° and 131.67° ± 6.15° in males and females, respectively. This angle showed significant gender differences bilaterally (P < 0.05). However, the bilateral differences in the CDA were not statistically significant among either male or female Binis (P > 0.05). Conclusion: The CDA can be employed as a morphometric indicator of sexual differences and for other clinical applications.