DESCRIPTION
NuVasive PCM Artificial Cervical Disc
Device Overview
The PCM (Porous Coated Motion) Cervical Disc is a motion-preserving total disc replacement device designed for cervical spine arthroplasty. It is indicated for reconstruction of the disc at single levels from C3-C7 following discectomy for intractable radiculopathy and/or myelopathy.
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Design Features
- Construction: Two cobalt-chromium-molybdenum (CoCrMo) endplates with a ultra-high molecular weight polyethylene (UHMWPE) insert
- Coating: Titanium plasma spray coating on the bone-contact surfaces
- Articulation: Ball-and-socket design allowing controlled motion
- Sizes: Multiple footprint options and heights to accommodate patient anatomy
- Profile: Low-profile design to maintain anatomical disc space height
Biomechanical Properties
- Allows for physiologic range of motion in:
- Flexion-extension
- Lateral bending
- Axial rotation
- Semi-constrained design helps prevent excessive translation
- Maintains center of rotation similar to natural disc
Surgical Specifications
- Approach: Anterior cervical
- Insertion Technique: Precise midline placement required
- Fixation: Initial stability achieved through serrated teeth and titanium coating
- Instrumentation: Specialized instrument set for preparation and implantation
Clinical Performance
- FDA approved for single-level cervical disc replacement
- Demonstrated maintenance of motion at treated segment
- Clinical studies show:
- Reduced adjacent segment degeneration compared to fusion
- Improvement in neck disability index (NDI) scores
- High patient satisfaction rates
Indications
- Symptomatic cervical disc disease (SCDD)
- Radiculopathy with or without neck pain
- Myelopathy due to disc herniation
- Failed conservative treatment for at least 6 weeks
- Skeletally mature patients
