2.4 mm Cannulated Screw System
A clinical need exists for a tiny, cannulated screw for fixation of fractures and nonunions of small bones, and small bone arthrodeses. The 2.4 mm Cannulated Screw provides an alternative for the same indications as the 3.0 mm Cannulated Screw, but it can also be used for fractures in smaller bones of the hands and feet. The primary usage of these screws will be as independent lag screws in small bones for hand and foot surgery Furthermore, the use of these small screws avoids excessive bone removal when implanting, solving the clinical issue of excessive bone removal in small bones.
The 2.4 mm Cannulated Screw System is the smallest cannulated screw offered for small bone indications in the hand and foot. The system features 2.4 mm Cannulated Screws ranging from 10.0 mm to 30.0 mm long and is offered in short and long threads. A 0.8 mm guide wire and related instrumentation allows for precise placement of the screw. The screw system complements existing cannulated screw systems by providing a smaller option than 3.0 mm for small bone fractures. The system addresses needs that were previously unmet by the larger screws.
The 2.4 mm Cannulated Screw Set features mini-cannulated screws made in stainless steel, and their related insertion instruments. Long thread screws range from 1020 mm in 1.0 mm increments and 2230 mm in 2.0 mm increments. Short thread screws range from 1720 mm in 1.0 mm increments and 2230 mm in 2.0 mm increments. The screws are self-drilling and self-tapping and have a StarDrive head that allows for self-retention and improved torque transmission. The system is housed in a module that fits in the Modular Hand System or Modular Foot Sets.
34-year-old patient, radial styloid fracture, good bone quality, 1.2 mm screw used.
a Preoperative x-ray.
b Follow-up after 1 week, AP view.
c Follow-up after 1 week, lateral view.
d Follow-up after 1 week, oblique view.
e Follow-up after 4 weeks, AP view.
f Follow-up after 4 weeks, lateral view.
g Follow-up after 4 weeks, oblique view.
Hazards and labeling
Due to varying countries’ legal and regulatory approval requirements, consult the appropriate local product labeling for approved intended use of the products described on this website. All devices on this website are approved by the AO Technical Commission. For logistical reasons, these devices may not be available in all countries worldwide at the date of publication.
This work was produced by AO Foundation, Switzerland. All rights reserved by AO Foundation. This publication, including all parts thereof, is legally protected by copyright.
Any use, exploitation or commercialization outside the narrow limits set forth by copyright legislation and the restrictions on use laid out below, without the publisher‘s consent, is illegal and liable to prosecution. This applies in particular to photostat reproduction, copying, scanning or duplication of any kind, translation, preparation of microfilms, electronic data processing, and storage such as making this publication available on Intranet or Internet.
Some of the products, names, instruments, treatments, logos, designs, etc referred to in this publication are also protected by patents, trademarks or by other intellectual property protection laws (eg, “AO” and the AO logo are subject to trademark applications/registrations) even though specific reference to this fact is not always made in the text. Therefore, the appearance of a name, instrument, etc without designation as proprietary is not to be construed as a representation by the publisher that it is in the public domain.
Restrictions on use: The rightful owner of an authorized copy of this work may use it for educational and research purposes only. Single images or illustrations may be copied for research or educational purposes only. The images or illustrations may not be altered in any way and need to carry the following statement of origin “Copyright by AO Foundation, Switzerland”.
Check www.aofoundation.org/disclaimer for more information.
If you have any comments or questions on the articles or the new devices, please do not hesitate to contact us.
“approved by AO Technical Commission” and “approved by AO Foundation”
The brands and labels “approved by AO Technical Commission” and “approved by AO Foundation”, particularly "AO" and the AO logo, are AO Foundation's intellectual property and subject to trademark applications and registrations, respectively. The use of these brands and labels is regulated by licensing agreements between AO Foundation and the producers of innovation products obliged to use such labels to declare the products as AO Technical Commission or AO Foundation approved solutions. Any unauthorized or inadequate use of these trademarks may be subject to legal action.
AO TC Innovations Magazine
Find all issues of the AO TC Innovations Magazine for download here.
Recognizing outstanding achievements in development and fostering excellence in surgical innovation.