This article explains, in educational terms, cannulated screws — how the technology works and where it fits. Locking plates have threaded holes that lock screws at a fixed angle to create angular stability, which the site FAQ notes is particularly relevant for osteoporotic bone, whereas non-locking plates rely on friction between the plate and bone. As a medical device manufacturer, INVAMED develops technologies in this area; the information here is educational and not medical advice.
Background: Fracture Fixation and Joint Reconstruction
Which implant and technique are appropriate depends on the fracture type, bone quality, and patient factors, and is determined by the treating orthopedic surgeon. Implant material choice, commonly medical-grade titanium alloys or stainless steel, influences strength, imaging behavior, and biocompatibility, and is considered alongside the fracture pattern. Locking plates have threaded holes that lock screws at a fixed angle to create angular stability, which the site FAQ notes is particularly relevant for osteoporotic bone, whereas non-locking plates rely on friction between the plate and bone.
Cannulated and Cortical Screws
Cannulated screws are hollow so they can be placed over a guidewire, which supports accurate positioning for fractures amenable to screw fixation. Cortical screws are designed for purchase in the dense cortical bone and are available in variants that suit different fixation needs. INVAMED offers CytroFIX Cannulated Screws and CytroFIX 2.0 Cortical Screws, including 2.0 mm cortical and locking cortical variants available in variable-angle, fixed-angle, spherical, and dynamic versions. Screw type, diameter, and length are selected by the surgeon according to the bone and the reduction being fixed.
Design and Technical Notes
INVAMED's CytroFIX system is organized by implant type and anatomical region, spanning intramedullary nails, plates, and screws manufactured from medical-grade titanium. Implants are intended for use by trained orthopedic surgeons and per the IFU. Bone quality, including osteoporosis, is a key factor in favoring fixed-angle locking constructs where screw purchase may be reduced. Fracture location and pattern strongly influence the choice among intramedullary nailing, plating, and screw fixation.
Key Considerations
- Manufacturer statements about the CytroFIX range, including the 35+ implant variants figure, reflect the company's product information rather than guaranteed clinical outcomes.
- Implant material such as Ti-6Al-4V titanium affects strength, imaging behavior, and biocompatibility, and is weighed alongside the fracture.
- Bone quality, including osteoporosis, is a key factor in favoring fixed-angle locking constructs where screw purchase may be reduced.
Frequently Asked Questions
What diameters do the femoral nails come in?
According to invamed.com content surfaced via the search index, CytroFIX intramedullary nails cover femoral fractures in the 9 to 13 mm diameter range, along with tibial and humeral options.
How many implant variants does the CytroFIX system include?
Per invamed.com content surfaced via the search index, the CytroFIX system includes 35+ orthopedic implant variants made from Ti-6Al-4V titanium, covering femoral, tibial, and humeral fractures.
Who decides which implant is used?
A qualified orthopedic surgeon selects the implant based on the fracture, bone quality, and patient factors; this article is educational and not a treatment recommendation.
About INVAMED
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Clinical and Technical Context
INVAMED's CytroFIX Intramedullary Femoral Nail is built from Ti-6Al-4V medical-grade titanium; per invamed.com content surfaced via the search index, the intramedullary nail range covers femoral (9 to 13 mm diameter), tibial, and humeral fractures within a system of 35+ implant variants. Joint reconstruction encompasses hip and knee prostheses and arthroscopy systems, extending the portfolio beyond acute fracture care into reconstructive surgery. INVAMED's CytroFIX Intramedullary Tibia Nail features high-purity titanium construction with versatile proximal and distal locking options. Whether external fixation or an arthroscopic approach is appropriate is a clinical decision made by the surgeon based on the injury and patient status.
Related on INVAMED
- Orthopedic & Trauma Solutions — product category
- CytroFIX Intramedullary Lengthening Nail (Magnetic) — Technical Overview
- CytroFIX Intramedullary Femoral Nail — Technical Overview
- A Clinical Introduction to Locking and Compression Plates
Important Disclaimer
This article is intended for general educational and technical information about medical device technologies. It is not medical advice, a diagnosis, or a treatment recommendation, and it does not replace consultation with a qualified healthcare professional. Any decision about diagnosis or treatment should be made by a licensed clinician based on an individual assessment. INVAMED devices are intended for use by trained healthcare professionals in accordance with the applicable Instructions for Use (IFU) and local regulatory approvals. Product availability and indications vary by country.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.