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MAVERICK™ Total Disc Replacement
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With the aide of coronal plane fluoroscopy the midline of the spine is accurately located.
A centering pin is inserted and the centerline location of both vertebral bodies is marked.
The pin is removed and a template is used to identify the lateral margins of the discectomy to guide the incision of the annulus.
Prior to incising the annulus, the disc material is separated from the bone using a curette.
Disc material is then removed to the posterior ligament using a pituitary rongeur.
With the disc space cleared ligamentous adhesions are released using a blunt-nose scraper to allow the operative level to move naturally.
After the disc area has been properly cleared the surgeon can verify the angle of the MAVERICK™ Prosthesis to be used by checking the disc space with trial spacers.
Correctly matching the component to the patient is made easy with a number of size and angle combinations available to surgeons.
There are eighteen sizes of the superior component and six of the inferior.
Upon determining the correct prosthesis angle, the 4-in-1 guide can be assembled and used to measure the A-P depth, measure height distraction, and guide chiseling.
The guide is first positioned on the centerline of the operative level.
Using the guide’s depth stops, its distal edge is aligned to the posterior margin of the vertebral endplate.
With the guide correctly positioned, distraction of the disc space can proceed.
Resection of the vertebrae is performed using keel and corner chisels placed into paths on the guide and driven into the vertebrae.
At the discretion of the surgeon, the cuts can be made with separate keel and corner-chisels or both cuts can be made with a combination chisel.
Following the cuts, the 4-in-1 guide is removed leaving the prepared disc space ready for the insertion of the MAVERICK™ Artificial Disc.
The MAVERICK™’s inferior and superior components are placed onto a block implant holder.
With the prosthesis held steady by the holder, it can be attached to the inserter.
The prepared disc is held open using a shim distractor and the prosthesis is driven into the space.
The posterior margin of the prosthesis should be placed as close as possible to the posterior longitudinal ligament.
Lateral fluoroscopy can be used to determine the correct positioning.
Caution: Investigational Device, limited by Federal (or United States) law to investigational use.
