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Multilevel Minimally Invasive ScrewsThe multilevel minimally invasive screw systems allows surgeons to deliver and apply screw and rod implants to the posterior aspect of the spine without the major muscle and tissue disruption encountered with traditional spinal fusion surgeries. This minimally invasive technique potentially allows significant patient benefits.
Spinal FusionSpinal fusion is a process using bone graft to cause two opposing vertebrae to grow, or “weld,” together. To ensure position and rigid alignment while fusion takes place, surgeons apply spinal instruments, or implants, such as screws and rods to the spine. These implants are joined together to maintain spinal stability and are rarely removed. Spinal fusion and implants are used to restore stability to the spine, correct deformity and bridge spaces created by the removal of damaged spinal elements such as discs.The Traditional Spinal Fusion Procedure with ImplantsTraditionally, implants are applied directly to the spine through an open approach requiring incisions up and down the middle of the back. Large bands of back muscles are stripped free from the spine and pulled off (retracted) to each side for visualization of the spine and easy access to the bones for instrument implantation. This stripping and retraction can cause considerable back pain, and the muscles, to some degree, are permanently scarred and damaged. The CD HORIZON LONGITUDE Spinal SystemUsing the CD Horizon Longitude system pedicle screws are placed over a guide wire in a minimally invasive fashion leaving the fascia and muscle intact. The rod is then threaded through the screw extenders. A set screw is used to secure the rod at each screw and the extenders are removed. This approach spares the muscles which are disrupted in open surgery and allows for long, multilevel fusion constructs.
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