A correlation between femoral neck shaft angle to femoral neck length

Knowledge of the anatomy of proximal end of femur is a prerequisite for a complete understanding of the mechanics of the hip joint and serves as a basis for the treatment of pathological condition of the hip and femur. A total of 250 adult femora were used to  measure femoral neck shaft angle, femoral neck length & femoral total length at S.B.K.S Medical institute, Vadodara. The neck shaft angle range from 116o to 150o with means of 136.3o & no significant side difference. The neck length range from 23mm to 44mm with mean of 34.4mm. The neck shaft angle significantly correlates with femoral neck length. The following is the regression equation : neck shaft angle = 95.28o + 1.20(length of neck). The present study is useful to remove lacuna of information about proximal femoral geometry in Indian people & calculate its impact on implant design.