Megan R Hsu1, Henry T Shu1, Kitchai Luksameearunothai2, Adam Margalit1, Andrew T Yu3, Erik A Hasenboehler4, Babar Shafiq1. 1. Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA. 2. Department of Orthopaedic Surgery, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand. 3. Department of Neurology, The Johns Hopkins University, Baltimore, MD, USA. 4. Orthopedic Institute of Pennsylvania, Camp Hill, PA, USA.
Abstract
Purpose: This study sought to compare the risk of subtrochanteric stress-riser fractures and biomechanical stability of the Femoral Neck System (FNS) versus multiple screw fixation (MSF). Methods: Eight paired cadaveric femurs were randomly assigned to FNS or MSF. Physiologic load mimicking single leg stance at the subtrochanteric region was applied to the constructs. Results: No constructs failed in the subtrochanteric region during loading. There was no significant difference in force (P = 0.364) or loading cycles (P = 0.348) between groups. Conclusion: FNS constructs were not associated with an increased incidence of iatrogenic subtrochanteric fractures or biomechanical stability versus MSF.
Purpose: This study sought to compare the risk of subtrochanteric stress-riser fractures and biomechanical stability of the Femoral Neck System (FNS) versus multiple screw fixation (MSF). Methods: Eight paired cadaveric femurs were randomly assigned to FNS or MSF. Physiologic load mimicking single leg stance at the subtrochanteric region was applied to the constructs. Results: No constructs failed in the subtrochanteric region during loading. There was no significant difference in force (P = 0.364) or loading cycles (P = 0.348) between groups. Conclusion: FNS constructs were not associated with an increased incidence of iatrogenic subtrochanteric fractures or biomechanical stability versus MSF.
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