The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2004
Filed:
Jan. 10, 2003
Guy Viart, Saint Leger, FR;
Frederic Marin, Paris, FR;
Eurosurgical SA, Beaurains, FR;
Abstract
The invention concerns an intervertebral disc prosthesis comprising an upper plate ( ) and a lower plate ( ) anchored respectively on the upper end-plate and the lower end-plate of the vertebral bodies of the vertebrae lying above and below a spine, a central core ( ) placed between the two plates ( ) which have an upper spherical cap ( ) and a lower spherical cap ( ) co-operating respectively with the spherical impressions ( ) arranged in said upper and lower plates, and an annular element ( ) made of viscoelastic material which is centred about the core ( ) and is urged into contact with protuberances ( ) provided on each internal surface ( ) of the upper plate ( ) and of the lower plate ( ) so as to limit and control the bending, inclining and rotating movements of the upper plate ( ) and of the lower plate ( ) relative to each other and about the core ( ), and ensure the positioning stability of the core ( ) between the two plates ( ) and prevent fibrous deposits from penetrating inside the prosthesis ( ).