| http://www.w3.org/ns/prov#value | - In one embodiment, a hydrogel, such as PVA, PGA or PMMA, may be used. [0097] In some embodiments it may be desirable to provide a more uniform loading at the junction between the prosthesis material and the NP, AF or endplates to reduce stress concentration and limit damage to any of the foregoing.
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