![]() ![]() However, the outcomes have been inconsistent. ĭynamic hip screws (DHS), cannulated cancellous screws (CCS) and proximal femoral nail anti-rotation (PFNA) are commonly used devices in the treatment of BFNF. Nonetheless, BFNF remains labeled as an “unresolved fracture” due to its frequent association with avascular necrosis or non-union even following surgical treatment. ![]() Considering that immobilization can result in severe complications, including pneumonia, urinary tract infections, pressure sores, and venous thromboembolism, early surgical intervention becomes imperative for the majority of these patients. Consequently, it can be regarded as a more unstable fracture compared to intertrochanteric fractures. BFNF exhibits a larger fracture angle and experiences higher forces and moments transmitted through the hardware in comparison with intertrochanteric fractures. We believe the concept of triangle fixation will be helpful to reduce femoral neck shortening associated with DHS and PFNA and thus improve the prognosis of BFNF.īasicervical femoral neck fracture (BFNF) is positioned between the femoral neck and the intertrochanteric region, constituting approximately 1.8% to 7.7% of all hip fractures. ConclusionsĬompared with DHS and PFNA, PFBN has advantages in stress distribution and biological stability. The PFBA group demonstrated the smallest displacement at the fracture interface, measuring 0.21 mm, coupled with a fracture interface pressure of 17.41 MPa, signifying excellent stability. In terms of stress on the implants, the PFBN group exhibited the best performance, with the lowest stress concentration at 112.0 MPa, followed by the PFNA group at 124.8 MPa and the DHS + DS group at 149.8 MPa. The PFBN group demonstrated the lowest stress on the implants, significantly lower than the PFNA and DHS + DS groups. For each fracture group, the von Mises stress and displacements of the femur and internal fixation components were measured under 2100 N axial loads. The PFBN group, the PFNA group and the DHS + DS group were our three test groups. Using finite element analysis, we created a three-dimensional model of the BFNF for this investigation. The aim of this study is to compare the biomechanical characters of DHS, PFNA, and PFBN for fixation of BFNF. The proximal femoral bionic nail (PFBN) was designed to decrease the postoperative complications associated with DHS and PFNA. Dynamic hip screws (DHS) and proximal femoral nail anti-rotation (PFNA) were recommended for basicervical femoral neck fracture (BFNF), however, with high rate of postoperative femoral neck shortening.
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