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Updated: Sep 30, 2025

Orthopedic Robot-Assisted Femoral Neck System in the Treatment of Femoral Neck Fracture
Published on: March 3, 2023
Is there an increased risk for subtrochanteric stress fracture with the Femoral Neck System versus multiple
Megan R Hsu1, Henry T Shu1, Kitchai Luksameearunothai2
1Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA.
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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