Anterior Cervical Disc
The relief of pain and return of normal function have been the driving forces behind advances in spinal surgery. While the clinical success of segmental fusion is well documented, it can impair a patient's future function by accelerating adjacent level disc degeneration. Disc arthroplasty, by maintaining joint mobility, can eliminate this common outcome. The concept for the C-DISC Artificial Cervical Disc has its foundation in this belief. By combining established successes in total diathrodial joint arthroplasty with the clinical experience gained from lumbar spine arthroplasty, C-DISC offers the patient freedom of movement.
Biome Mechanics:
Designed as a non-constrained, full motion implant, C-DISC complements the biomechanics of the cervical spine without interfering with the natural restrictions of movement imposed by surrounding bony and soft tissue structures. The articulation interface covers the total surface area of the implant's two components, enabling the largest radius arc and a true translatory gliding motion that mimics the function of a normal disc.
Materials:
C-DISC’s two components are composed entirely of clinically proven materials. The caudal component, a Titanium AlIoy with UHMW polyethylene articulation interface. The cranial component, also Titanium has a highly polished Titanium articulating surface.
Indications:
• HNP C3-4 to C7-T1
• Cervical spondylosis
• Cervical radiculopathy
• Degenerative cervical disk disease
• Cervical myelopathy
• MRI documented evidence of mechanical pressure on neurological elements
• One, two, or three level spinal canal compression from C3-4 to C7-T1
• Adjacent to a spinal fusion in the cervical spine (adjacent segment disease, use Flanged C-DISC)
Contra-Indications:
• Greater than or equal 3.5 mm of anterior translation
• Ossification of the posterior longitudinal ligament (OPLL)
• Infection
• Ankylosing spondylitis
• Severe loss of cervical bone stock
• Cervical spondylolisthesis with posterior element defect
• Cervical spinal stenosis, defined as AP diameter of spinal canal < 10 mm
• Severe posterior facet joint arthritis
Advantages:
• Non-constrained design range of motion is limited only by the patient's physiology
• C-DISC is a true cervical disc replacement - large radius of the joint curvature mimics the cervical spine's motion characteristics
• Minimal bone resection anatomically sculptured profile matches the disc space
• Minimal intersegmental distraction - minimizes potential of patient trauma
• Maximum stability shaped contour provides superior surface contact between implant and bone
• Clinically researched implant sizes - provide for individual patient anatomy
Surgeon Summary:
• Freedom of movement, flexion/extension, lateral bending and axial rotation, C-DISC mimics all the functions of a normal disc.
• Sculpted contour engages with the dorsolateral weight-bearing region of the uncovertabral joints.
• C-DISC non-constrained design allows total motion freedom, its only limitation is the patient's physiology.
• 0.4 mm teeth securely retain the implant and resist anterior subluxation
• Manufactured from Titanium alloy and UHMW polyethylene, both proven orthopaedic materials with excellent biocompatibility
• Comprehensive yet concise instrument set covers all aspects of preparation, sizing and implantation in a single sterilizing case.
