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7.3 mm Locking Cannulated Screw Uses & Sizes • Vast Ortho

A 7.3mm Cannulated Screw features a hollow core for guide-wire insertion, low-profile head, reverse cutting flutes for easier removal, and varied thread lengths for optimal bone purchase, designed for stabilizing large bone fractures (femur, pelvis, tibia) with minimal invasion; its countersink design creates a smooth, stable seating for the screw head, reducing soft tissue irritation, often using a specialized cannulated countersink to match the 2.8mm guide wire .

Key Design Features

Cannulation : A central hole accepting a 2.8mm guide wire allows precise placement, crucial for percutaneous surgery.
Head Design: Low-profile, often hemispherical, to minimize soft tissue irritation and ensure good contact with plates if used.
Thread : Available in various lengths (fully threaded or partially threaded) for different bone fragment sizes, enhancing stability.
Flutes : Reverse cutting flutes help in screw removal if needed.
Self-Tapping : Some variations are self-tapping to reduce insertion torque.

Countersink Purpose & Design

Function: To create a smooth, conical recess in the bone, allowing the screw head to sit flush or slightly below the surface, providing stable compression.
Matching System: A specific cannulated countersink (e.g., for 6.5/7.3mm screws) is used to match the screw's diameter and the guide wire, ensuring proper seating.

Surgical Applications

Fracture fixation in large bones (femoral neck, tibial plateau, pelvis, sacrum).
Osteotomies, arthrodeses, and non-unions.

Surgical Technique Considerations

Use fluoroscopy to confirm final placement.
Ensure the countersink matches the screw size and drill hole.
Use optional washers for added stability, noting they won't pass through percutaneous sleeves.

6.5mm and 7.3mm Large Fragment Cannulated Screw System ...
Large Cannulated Screws (6.5mm and 7.3mm diameters) are intended for fracture fixation of large bones and large bone fragments suc...

OrthoPediatrics
7.3mm Cannulated Screw - Auxein: Pioneering Orthopedic Solutions Worldwide

Auxein
310.78 Synthes Cannulated Countersink 10-13/16" - Primis Medical
Surgeons must ensure good visibility and that the countersink is appropriate for the screw size (in this case 6.5/7.3 mm), the dri...

Primis Medical

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Countersink Design Cannulated Screw

Double Medical

https://www.doublemedicalgp.com › countersink-desig...

Double Medical

https://www.doublemedicalgp.com › countersink-desig...

These screws are cannulated design that can facilitates accurate percutaneous insertion with minimal invasion. The screws are mainly used for osteotomies, bone ...

6.5mm and 7.3mm Large Fragment Cannulated Screw ...

OrthoPediatrics

https://www.orthopediatrics.com › 2023/07 › ST-...

OrthoPediatrics

https://www.orthopediatrics.com › 2023/07 › ST-...

PDF

Large Cannulated Screws (6.5mm and 7.3mm diameters ) are intended for fracture fixation of large bones and large bone fragments such as: slipped capital femoral ... Read more

28 pages

Cannulated Countersink

ATOM Medical Devices Co., Ltd.

https://www.atommd.com › cannulated-screw-system-in...

ATOM Medical Devices Co., Ltd.

https://www.atommd.com › cannulated-screw-system-in...

This complete instrument system is designed for percutaneous cannulated screw internal fixation in orthopedic surgery, compatible with 6.5–7.3mm diameter ...

7.3 mm Locking Cannulated Screw Uses & Sizes

Vast Ortho

https://www.vastortho.com › Home › Cannulated Screws

Vast Ortho

https://www.vastortho.com › Home › Cannulated Screws

7.3 mm Locking Cannulated Screw is intended for fixation of fractures, fusions, and osteotomies of Small and large bones appropriate for the size of the device. Read more

Synthes 310.78 Cannulated Countersink 10-13/16" Synthes

Primis Medical

https://primismedical.com › products › synthes-310-78-...

Primis Medical

https://primismedical.com › products › synthes-310-78-...

The Synthes 310.78 Cannulated Countersink is a surgeon's tool used during the placement of 6.5 mm or 7.3 mm cannulated screws . Because cannulated screws are ... Read more

$105.00 In stock $5.50 delivery 30-day returns

KC-8 - 7.3mm Cannulated Cancellous Screw

KAULMED

https://www.kaulmed.com › uploads › 2025/06

KAULMED

https://www.kaulmed.com › uploads › 2025/06

PDF

Their cannulated design ensures accurate placement over a guide wire, making ... Cannulated Countersink with T-Handle for Ø7.3mm KC-8 Cannulated Screw ... Screw ...

Orthopedic Plates and Screws 7.3mm Cannulated Screw with ...

Made-in-China.com

https://canwellmedical.en.made-in-china.com › product

Made-in-China.com

https://canwellmedical.en.made-in-china.com › product

Product Name, Orthopedic plates and screws 7.3mm cannulated screw . Material, The 7.3mm cannulated screws are made of titanium. Color, Customized.

7.3mm Cannulated Screw,Medical Device & Implants ...

Double Medical

https://www.doublemedicalgp.com › 7-3mm-cannulate...

Double Medical

https://www.doublemedicalgp.com › 7-3mm-cannulate...

These screws are cannulated design that can facilitates accurate percutaneous insertion with minimal invasion. ... Countersink Design 7.3mm Cannulated Screw ... Read more