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Nucleus
• Viscoelastic polymer designed to simulate native nucleus
• Allows physiologic axial compression
• Retained between endplates & fiber annulus matrix
• Designed to enable physiologic Center Of Rotation |
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Annulus
• Ultra High Molecular Polyethylene (UHWMPE) fiber material
• Intended to simulate native annulus & its performance
• Designed to provide controlled physiologic motion in all planes and axes
• Robust fiber matrix with multiple layers similar to native annulus |
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Sheath
• Designed to minimize tissue in-growth & debris migration
• Allows for full range of motion |
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Fixation
• Titanium endplates with tri-keel design
• Titanium Plasma Spray (TPS) coated endplate
• Low profile keel height (2mm) |
M6 Quality of Motion
Biomechanical testing with the M6 artificial cervical disc has demonstrated equivalent Quality of Motion compared to the healthy disc. The innovative artificial fiber annulus and nucleus construct of the M6 is the critical component in replicating this physiologic motion, as it is designed to provide the necessary restraint and control needed throughout the spine's natural range of motion.
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Biomechanical results showing the M6 cervical disc (orange) maintained total ROM (13.5)
vs. the intact disc (13.3) with excellent Quality of Motion. The "kinematic signatures"
of the intact disc (grey) and M6 cervical disc are nearly identical.
Patwardhan et al. Musculoskeletal Biomechanics Laboratory, Edward Hines Jr. VA
Hospital, Hines, Illinois, USA
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