02/12/2010
AO Technical Commission Approved

Inter-lock Screwdriver T25/3.5 mm Hex

An essential part of fracture fixation today is ensuring soft tissue protection, driving surgeons to use MIO techniques and small, stab incisions for screw insertion with either plates or nail implants. However, several difficulties have been reported, such as missing screws, disengagement of the screw from the screwdriver, improper direction of screw insertion, and other problems.

For the current T25 and 3.5 mm hex screwdrivers, an external holding sleeve is available to retain the screw, but there are certain disadvantages with the external holding sleeve, such as the difficulty in the handling procedure and the need for a larger incision for the proper insertion of the instrument.

In order to address these clinical challenges, a new self-holding screwdriver has been designed to facilitate screw insertion, especially through small incisions at areas with large amounts of soft tissue, and will greatly help avoid the risk of disengagement of the screw.

The tips of the new Inter-lock Screwdrivers (T25/3.5 mm Hex) lock into the recesses of existing Synthes screws with a StarDrive 25 or 3.5 mm hexagonal recess (Fig 1). Wings were added to the nut for better grip when tightening the nut down while capturing the screw (Fig 2). After insertion of the screw, no force is required to release the screw from the tip of the screwdriver. The screwdrivers are available in two lengths: 330 mm and 224 mm.

This new screwdriver will improve the current screw insertion and removal procedures when compared to previously available screwdrivers, and will help to decrease the required OR time for these procedures.

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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. 


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