Outcomes of BDSF technique for osteosynthesis of femoral neck fractures

Introduction: Femoral neck fractures present a significant challenge for orthopedic surgeons, especially in young patients who want to preserve their natural femoral head. Conventional methods for fixing these fractures often lead to poor outcomes and high complication rates. The Biplane Double-supported Screw Fixation (BDSF) technique is a novel approach that involves placing screws in two planes simultaneously, creating a two-point support for the screws in the neck and head of the femur. Methods: This study aimed to evaluate the effectiveness of the BDSF technique in treating femoral neck fractures in patients aged 20-60 years. A total of 28 patients with fresh femoral neck fractures (less than three weeks old) were treated with closed reduction and internal fixation using the BDSF method. The patients' functional outcomes were evaluated using the Harris hip score, and the radiographic outcomes of union, femoral neck shortening, screw back-out, and femoral head avascular necrosis (AVN) were also evaluated. Results: The results showed that the BDSF technique is a safe and effective method for treating femoral neck fractures in young adults. Out of the 25 patients who were followed up for a mean time of 18 months (range 6-24 months), 20 (80%) achieved fracture union in a mean time of 5.2 months. Non-union occurred in five patients (20%), and AVN of the femoral head was observed in three patients (12%). Two patients experienced varus collapse, but their fractures united successfully. Conclusion: The BDSF technique offers several advantages over conventional methods, including increased stability and improved fixation strength. It can be considered as an alternative to conventional methods for managing femoral neck fractures in young adults, with a low incidence of non-union and avascular necrosis and no cases of fixation failure or varus collapse.