INTERVERTEBRAL DISC PROSTHESIS MADE FROM THERMOPLASTIC MATERIAL HAVING GRADUATED MECHANICAL PROPERTIES
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United States of America Patent
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Issued Date -
Feb 12, 2015
app pub date -
Apr 25, 2012
filing date -
Apr 27, 2011
priority date (Note) -
Abandoned
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Abstract
An intervertebral disc prosthesis comprises a structure having a rigid upper plate, a rigid lower plate, and a core inserted between said plates, the structure being made from thermoplastic material, the core further comprising a thermoplastic monomaterial having graduated elastic and damping properties. According to one alternative, the core is composed of an elastomeric central nucleus surrounded by one or more rings which are referred to as rings having ranks j relative to the core, and which are more rigid.
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