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Femoral Neck System (FNS)
The Femoral Neck System (FNS) is a dedicated solution for femoral neck fractures, designed for improved angular stability1 and rotational stability2 with the intent to reduce reoperations related to fixation complications.
Features & Benefits
Designed to provide both angular and rotational stability in a single implant intended to reduce reoperations related to fixation complications.1,2
Designed for reduced procedural complexity utilizing a technique and insertion handle requiring only a single, central guide wire.3
Resistance to Varus Collapse
A published biomechanical study shows that FNS is twice as strong as three cannulated screws (3CS) against femoral neck and leg shortening. The same study also revealed comparable results to two types of sliding hip screws.1
Integrated Rotational Stability
Regardless of construct size, FNS offers enhanced rotational stability. Mechanical testing indicates up to 40% increased rotational stability when comparing to a sliding hip screw (SHS) and a minimum of 150% more rotational stability compared to three cannulated screws.2,4*
Designed with a small footprint to reduce lateral prominence, a dynamic Bolt and ARScrew to eliminate lateral protrusion of the implant, and a short incision to reduce soft tissue disruption.3
FNS Case Study: Valgus Impacted Non-displaced Subcapital Femoral Neck Fracture in Elderly Patient
FNS Case Report: Repair of a Displaced Intracapsular Femoral Neck Fracture
FNS Case Report: Repair of a Highly Displaced Comminuted Femoral Neck Fracture in a Young Patient
FNS Inventory Control Form
FNS OR Chart
FNS Value Analysis Brief
FNS Evidence Infographic
Biomechanical Evaluation of the Femoral Neck System in Unstable Pauwell's 3 Femoral Neck Fractures (JOT 2017)
*The Sliding Hip Screw was tested as DePuy Synthes DHS Blade
1. Stoffel K, Zderic I, Gras F, et al. Biomechanical Evaluation of the Femoral Neck System in Unstable Pauwels III Femoral Neck Fractures: A Comparison with the Dynamic Hip Screw and Cannulated Screws Orthop Trauma. 2017. (31): 131-137.
2. DePuy Synthes Report: Static cut through rotation test in bone foam. 2016. Ref: 0000165855.
3. DePuy Synthes Report: FNS Design and Procedure Comparison. 2018. Ref: 0000274963.
4. DePuy Synthes Report: Static Cut Through Rotation Test in Bone Foam. 2018. Ref: 0000277853.
The Femoral Neck System (FNS) is indicated for femoral neck fractures, including basilar, transcervical, and subcapital fractures, in adults and adolescents (12-21) in which the growth plates have fused or will not be crossed.
The specific contraindications for the Femoral Neck System (FNS) include:
- Pertrochanteric fractures
- Intertrochanteric fractures
- Subtrochanteric fractures
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