Medical device systems for treating a spine and related methods are described. In some embodiments, a medical device system includes an expandable intradiscal portion configured to be placed between two vertebras, and an expandable first extradiscal portion capable of being in fluid communication with the intradiscal portion.

 
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> Polymeric joint complex and methods of use

> Posterior spinal arthroplasty-development of a new posteriorly inserted artificial disc and an artificial facet joint
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