Category: Deformity surgery
The VIPER® SAI Screw is the first implant designed specifically for the Sacral-Alar-Iliac technique for sacropelvic fixation. Fusions of the lumbosacral spine continue to be a challenging area in spine surgery. The complex local anatomy, unique biomechanical forces, and poor bone quality of the sacrum are just a few of the many reasons why fusions of the lumbosacral spine have been notoriously difficult to perform.
The VIPER/VIPER2 Systems are intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of acute and chronic instabilities or deformities of the thoracic, lumbar and sacral spine.
The VIPER Spine System is intended for noncervical pedicle fixation and nonpedicle fixation for the following indications: degenerative disc disease (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies); spondylolisthesis; trauma (i.e., fracture or dislocation); spinal stenosis; curvatures (i.e., scoliosis, kyphosis, and/or lordosis); tumor, pseudarthrosis; and failed previous fusion in skeletally mature patients.
WARNINGS, PRECAUTIONS & CONTRAINDICATIONS
Refer to the VIPER® SAI Screw System IFU for complete information
|Favored angle of 350 to one side||Ensures alignment with other implants and proper rod seating|
|Robust Drive Feature||Withstands higher torque during insertion|
|Increased Neck size||Potential reduction of implant failure at the top of the shank|
• Potentially prevents irritation to sacroiliac joint
• Can be used in a percutaneous application