Most orthopaedics implants were designed and manufactured based on data from the Western population whose skeletal dimensions are different from the Bengali Bangladeshi population. This study aims to determine the value of the femoral neck-shaft angle of the adult Bengali Bangladeshi population for adequate planning, preparation and pre-operative selection of orthopaedic implants for surgeries involving the femoral neck and stocking of orthopaedic implants. This was a cross-sectional analytical study which involved measuring the femoral neck-shaft angle (NSA) from the pelvic radiographs anterior-posterior view of adult patients reported "normal study" by the registered radiologist. This study was carried out in the Department of Anatomy, Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh from March 2019 to February 2020. A total of 200 femoral neck-shaft angles were analyzed from 100 patients' radiographs comprising 50 males and 50 females. The average NSA of adult Bengali Bangladeshi is 128.74°±5.83° with a mean value of 128.68°±6.20° for the right and 128.81°±5.66° for the left. The mean value of NSA is 129.64°±5.90° and 127.85°±5.64° in adult males and females respectively. The femoral neck-shaft angle in adult Bengali Bangladeshi males was significantly higher than the females.
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