TiLock Cortical Spinal System

The Genesys Spine TiLock® Cortical Spinal System is designed to provide surgeons and their patients with a robust, anatomy-conserving alternative to traditional pedicular fixation.

1. Screw insertion through a medial starting point enables less tissue dissection and retraction for reduced muscle damage

2. Screw trajectory makes a medial to lateral and caudal to cephalad path, the direction away from the neural elements provides safety and a lower incidence of nerve injury.

3. Decompression and fusion are possible through the same midline surgical corridor

4. Medial to Lateral Trajectory may minimizes Lateral retraction and dissection, attributing to less blood loss, decreased operative time, and less post-operative pain

5. Screw trajectory is away from neural elements

6. Equal or superior purchase in cortical bone

7. Can be used as a primary pedicle fixation or as an alternative approach to lumbar revision surgeries.

The Midline Approach:

Posterior spine fusion with screw fixation is a common and reliable method of instrumentation of the spine for a variety of spine pathologies when the ultimate aim of surgery is the fixation of the spine to allow bony fusion. The mainstay of this kind of surgery has been the use of pedicle screw fixation. The trajectory of pedicle screws aims to transverse the pedicle down its anatomical axis, with a screw specifically designed for fixation in cancellous bone. More recently, Santoni et al., in 2009 proposed using an alternative trajectory, a cortical bone based fixation technique, which utilizes a different path down the pedicle with the aim of maximizing the contact between screw and cortical bone.

Posterior lumbar spine fusion using the cortical based trajectory has advantages over traditional pedicle screw techniques including reduced dissection and tissue trauma, increased biomechanical stability in both high and low quality bone and is thereby a valid alternative to traditional techniques.¹

¹Donnellan CJ, Ball J, Rao PJ, Phan K, Mobbs RJ (2016) The Cortical Bone Trajectory: An Alternative to Traditional Pedicle Screw Fixation – A Review. JSM Neurosurg Spine 4(1): 1061

TiLock Cortical Benefits and Features:

The TiLock Cortical Spinal System features:

• Low-profile tulip head
• Over-the-wire insertion for a simple, less-invasive approach
• Reduced tulip head that allows for efficient screw placement with nominal bony removal
• Corticocancellous thread pattern for maximum fixation in bone
• Tapered cortical self-tapping thread for initial placement