BANDSCHEIBENERSATZ FÜR DEN KERN EINER BANDSCHEIBE

摘要

Invertibral prothesis, for damaged invertebral disc nucleus, which has a flat spiral of plastics that can be pulled out lengthwise with tools and rewinds automatically to its spiral form in the unstressed state, the spiral has hydrogel structure(s) on the upper or under side, which swell by absorbing water and project from the spiral on the upper or under side.