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Subcapital femoral neck fractures are often treated with a Femoral Neck System (FNS) or similar devices like the Compound Compression System (CCS), which feature a main loading bolt and a specialized anti-rotation screw to ensure stability and prevent femoral head rotation. The AO Foundation Surgery Reference indicates that this construct allows for angular-stable fixation and continuous sliding compression, which are crucial for minimizing complications such as nonunion or avascular necrosis. 
Key Considerations for Use: 
  • Indication: Ideal for managing subcapital, transcervical, and basilar femoral neck fractures, particularly in cases requiring rigid stability to prevent rotational deformity. 
  • Anti-rotation Screw Function: The anti-rotation screw locks into the main bolt, allowing for relative sliding while maintaining stability. 
  • Surgical Technique: A dedicated anti-rotation wire is often placed first to prevent displacement during reaming. The device offers a minimally invasive alternative to traditional techniques, as noted in the Double Medical product information and this PubMed article. 
  • Fixation Quality: Studies indicate that FNS with an anti-rotation screw provides superior stability compared to simple cannulated screws for specific fracture types, notes this PubMed article. 
For specific techniques regarding the sliding hip screw, you can review the AO Foundation Surgery Reference. 
  • Impacted or nondisplaced subcapital femoral neck fractures
    The antirotation screw is inserted through and locks to the bolt, the main load carrier. They can slide together within the plate ...
    AO Foundation Surgery Reference
  • Compound Compression System CCS,Medical Device Manufacturers
    The CCS is indicated for the following fractures: * Basilar fractures * Transcervical fractures * Subcapital fractures * Femoral n...
    Double Medical
  • Comparison of dynamic hip screw and antirotation ... - PMC
    Dynamic hip screw/antirotation screw was a more relevant treatment method for transcervical femoral neck fractures compared to CS ...
    National Institutes of Health (.gov)
  • Displaced subcapital femoral neck fractures - AO Surgery Reference
    5. Guide-wire insertion * Insertion of antirotation wire. To prevent displacement during reaming and bolt and antirotation screw i...
    AO Foundation Surgery Reference
  • Sliding hip screw with antirotation screw for Basicervical femoral neck fractures
    A medical expert, like a doctor, is best able to help you find the information and care you need. This information does not consti...
    AO Foundation Surgery Reference
  • Comparative study on the clinical efficacy of femoral neck system ...
    Studies indicate that the femoral artery and its branches play a critical role in blood supply. Femoral neck fractures or related ...
    PubMed Central (PMC) (.gov)
  • Comparison of femoral neck system versus cannulated cancellous ...
    Jul 31, 2024 — To prevent inadvertent rotation of the femoral head, insert an additional unused wire as an anti-rotation wire into the superior/a...
    National Institutes of Health (.gov)
  • Comparison of three different internal fixation methods in the treatment of femoral neck fracture
    Jul 30, 2024 — In recent years, two structurally similar internal fixation devices, the Femoral Neck System (FNS) and Compound Compression System...
    ScienceDirect.com
  • Femoral Neck System I Siora Surgicals Pvt. Ltd.
    The system is minimally invasive, reducing surgical trauma while ensuring biomechanical support. It ( The Femoral Neck System ) is...
    www.siiora.com
  • Clinical efficacy and finite element analysis of dynamic crossing screw system in the treatment of non-displaced femoral neck fractures in elderly patients with osteoporosis
    Nov 21, 2025 — Surgeons still disagree on the best way to fix femoral neck fractures. Common options like dynamic hip screws and cannulated screw...
    National Institutes of Health (.gov)
  • Impacted or nondisplaced subcapital femoral neck fractures
    The antirotation screw is inserted through and locks to the bolt, the main load carrier. They can slide together within the plate ...
    AO Foundation Surgery Reference
  • Compound Compression System CCS,Medical Device Manufacturers
    The CCS is indicated for the following fractures: * Basilar fractures * Transcervical fractures * Subcapital fractures * Femoral n...
    Double Medical
  • Comparison of dynamic hip screw and antirotation ... - PMC
    Dynamic hip screw/antirotation screw was a more relevant treatment method for transcervical femoral neck fractures compared to CS ...
    National Institutes of Health (.gov)
Show all
This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes. Learn more
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Web results

Sliding hip screw with antirotation screw


AO Foundation Surgery Reference
https://surgeryreference.aofoundation.org › adult-trauma
AO Foundation Surgery Reference
https://surgeryreference.aofoundation.org › adult-trauma
The insertion of an antirotation screw is necessary to provide sufficient rotational stability. Fixation of a femoral neck fracture with a sliding hip screw.Read more
Femoral Neck Subcapital CCS Antirotation Screw from surgeryreference.aofoundation.org
Missing: Subcapital ‎CCS

Comparison of dynamic hip screw and antirotation ... - PMC


National Institutes of Health (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC7489184
National Institutes of Health (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC7489184
by A Şahin · 2020 · Cited by 13 — Dynamic hip screw/antirotation screw was a more relevant treatment method for transcervical femoral neck fractures compared to CS with more favorable functional ...Read more
Missing: CCS ‎| Show results with: CCS

SUBCAPITAL FRACTURES OF FEMORAL NECK TREATED ...


boneandjoint.org.uk
https://boneandjoint.org.uk › Article
boneandjoint.org.uk
https://boneandjoint.org.uk › Article
Aug 1, 2008 — Introduction:- We reviewed 69 patients with subcapital fracture neck of femur treated with two hole plate DHS and parallel de-rotation screw ...Read more
Missing: CCS ‎| Show results with: CCS

Impacted or nondisplaced subcapital femoral neck fractures


AO Foundation Surgery Reference
https://surgeryreference.aofoundation.org › adult-trauma
AO Foundation Surgery Reference
https://surgeryreference.aofoundation.org › adult-trauma
The antirotation screw is inserted through and locks to the bolt, the main load carrier. They can slide together within the plate barrel up to 20 mm.Read more
Femoral Neck Subcapital CCS Antirotation Screw from surgeryreference.aofoundation.org
Missing: CCS ‎| Show results with: CCS

Compound compression system CCS


Double Medical
https://www.doublemedicalgp.com › Plate
Double Medical
https://www.doublemedicalgp.com › Plate
Compound compression system (CCS) consists of lag screw, antirotation screw, fixation plate, locking screw, and end cap. It is indicated for Femoral neck ...Read more
Femoral Neck Subcapital CCS Antirotation Screw from www.doublemedicalgp.com

Femoral neck system with an additional cannulated screw ...


Frontiers
https://www.frontiersin.org › fbioe.2025.1688008 › full
Frontiers
https://www.frontiersin.org › fbioe.2025.1688008 › full
by X Yu · 2025 — For elderly patients with femoral neck fractures, FNS fixation augmented with a CCS offers significant advantages over FNS alone, including ...Read more

Comparison of dynamic hip screw with anti-rotation ... - PMC


PubMed Central (PMC) (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC11612970
PubMed Central (PMC) (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC11612970
by H Hong · 2024 · Cited by 6 — Comparison of dynamic hip screw with anti-rotation screw and femoral neck system internal fixation for the treatment of garden II–IV type femoral neck fractures.Read more
Missing: CCS ‎| Show results with: CCS

Comparative study of rhBMP-2 assisted femoral neck ...


Nature
https://www.nature.com › scientific reports › articles
Nature
https://www.nature.com › scientific reports › articles
by D Li · 2025 · Cited by 3 — An anti-rotation screw was then inserted into the femoral neck power rod and gradually compressed. Re-examination indicated successful fracture ...Read more
Images
Femoral neck system for Impacted or nondisplaced subcapital ...
Femoral neck system for Impacted or nondisplaced subcapital ...
AO Surgery Reference - AO Foundation
A sliding hip screw (SHS) with a 2-hole plate plus an ...
A sliding hip screw (SHS) with a 2-hole plate plus an ...
ResearchGate
Compound Compression System CCS,Medical Device Manufacturers ...
Compound Compression System CCS,Medical Device Manufacturers ...
Double Medical
All images
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Web results

Femoral neck system as a safe alternative to cannulated...


Lippincott Home
https://journals.lww.com › smj › fulltext › femoral_nec...
Lippincott Home
https://journals.lww.com › smj › fulltext › femoral_nec...
by ZZC Lim · Cited by 6 — The femoral neck system (FNS) is a safe alternative to cannulated compression screw (CCS) and dynamic hip screw (DHS) in femoral neck fractures.Read more
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