Intervertebral disc prosthesis
AssigneeLDR Medical
InventorsIstvan Hovorka, Pierre Bernard
Life of this patent
Estimating the term…
Abstract
This disclosure relates to intervertebral disc prostheses which may have an upper plate, a lower plate, and a mobile core, with the upper surface of the core being in contact with at least a part of the lower surface of the upper plate. In some configurations, limit stops reduce friction while limiting or preventing the movements of the core relative to the lower plate, in translation and in rotation, respectively, along an axis substantially parallel to the lower plate and about an axis substantially perpendicular to the lower plate. Instrumentation for insertion of the prostheses into intervertebral spaces is also described.
Claims21
1-12. (canceled)
An intervertebral disc prosthesis comprising:
- a superior plate configured to engage an inferior surface of a superior vertebral body;
- an inferior plate configured to engage a superior surface of an inferior vertebral body, the inferior plate including a pair of contact plates disposed adjacent opposite lateral sides of the inferior plate;
- and
- a mobile core disposed between the superior plate and the inferior plate, the mobile core including a pair of recesses configured to receive the pair of contact plates.
A motion preserving disc prosthesis comprising:
- an upper plate including a superior surface and an inferior surface;
- a lower plate including a superior surface and an inferior surface, the lower plate including a pair of contact plates extending superiorly and disposed adjacent opposite lateral sides of the inferior plate;
- and
- a core including an at least partially convex upper surface configured to engage the inferior surface of the upper plate and a substantially flat lower surface configured to slidably engage the superior surface of the lower plate, the core further including a pair of recesses configured to receive the pair of contact plates.
Dependencies are inferred from the claim text.