By estimating dominant force on femoral neck fracture's crevice reliability of the fracture's classification increases.

ABSTRACT Aim To ensure a more reliable classification system for the femur neck fractures by estimating pressure and tensile force on the fracture crevice. Methods The study compared the kappa coefficient for the inter and intraobserver agreement of the same five observers on the same radiographic sample of the femur neck fracture with a time gap of one year for the AO group and original proposal of estimated dominant pressure and tensile force on the femur neck fracture’s crevice. Results The kappa coefficient for the AO group was 0.49 and for the system for estimating the dominant force on the fracture’s crevice it was 0.78. For the observer our proposal is easier to use than the AO system. Conclusion The estimation system of the dominant force on the fracture’s crevice is more reliable and thus more acceptable than the AO group system for femoral neck fractures.