The U.S. Leader in All Sterile Single
and Two Level Posterior Lumbar Fusion

Products - Active™ Screw

ACTIVE™ Screw is a novel screw design, which utilizes an expandable thread crest component instead of a fixed thread crest. The screw, after insertion, has the ability to expand into areas of low bone density to ensure firm fixation. In addition, because the thread crest component exerts a radial force on the bone, new bone formation is encouraged via Wolff’s law.

This technology can be applied to any threaded component in spine or orthopedics. IIS has successfully applied the technology to bone screws from 3.0 mm to 7.5 mm. The technology is covered by US patents (US 7,935,138 and 8,414,630), and international patents are pending. The screw is composed entirely of Ti6Al4V ELI.

A 510(k) for the ACTIVE™ Screw was approved in 2012, with the following intended use and indications for use:

  • The ACTIVE™ Screw Bone Screw is intended for implantation into prepared bone during orthopaedic surgery when the surgeon determines the need for additional fixation: bone reconstruction, osteotomy, arthrodesis, joint fusion, fracture repair, and fracture fixation, appropriate for the size of the device.

  • The ACTIVE™ Screw Bone Screw is indicated for use in bone reconstruction, osteotomy, arthrodesis, joint fusion, fracture repair, and fracture fixation, appropriate for the size of the device.

ACTIVE™ Screw Bone Screws – 3.0 mm (green) and 4.5 mm (gold)
ACTIVE™ Screw Bone Screws – 3.0 mm (green) and 4.5 mm (gold)

IIS is interested in licensing this technology to interested parties and is willing to partner with companies for development of the technology for their specific application.

Click on the images below to view a larger display.

Active™ Screw

ACTIVE™ Screw Bone Screws – 3.0 mm (green) and 4.5 mm (gold)
Active™ Screw

Active™ Screw in bone
Active™ Screw

CAD Image of Active Screw Design – Gold is expandable thread crest, the shank is gray.
Active™ Screw
 
Biocompatibility of a novel expandable threaded screw using an ovine bilateral femoral model: a preliminary study
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