prodisc CORE is a novel application of the established ball & socket and the synergy of two critical design principles:
a fixed core and an optimized core radius
that together provide stability while resisting shear forces and facilitate controlled motion to protect the facet complex.
At the heart of prodisc CORE technology is a fixed center of rotation intentionally designed to stabilize the motion segment and resist shear forces.1
Conversely, total disc replacement implants with a mobile core do not provide stability or resist shear forces.1
When a shear force is applied to a total disc replacement implant with a mobile core, free translation may occur. Shear forces are therefore resisted by the facets.1
The radius of the prodisc CORE was engineered with intention, to provide coupled motion—controlled translation with flexion-extension—protecting the facet complex and resisting shear.2
An undersized radius allows minimal translation along with flexion-extension of the implant, while an oversized radius allows translation with minimal flexion-extension.2
1 Sears, R., et al., Kinematics of Cervical and Lumbar Total Disc Replacement, Semin Spine Surg, 2006, 18:117-129.
2 Bertagnoli, R., Marnay, T., Mayer, H.M., The PRODISC Book, 2003.
prodisc CORE is the result of years of engineering, biomechanical testing & clinical evaluation—and the ‘core’ behind the durability that has powered the reliable and predictable clinical outcomes of every prodisc device for more than 30 years.
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