Partial disc prosthesis
First Claim
Patent Images
1. Partial disc prosthesis (2;
-
102;
202;
302;
402;
602) intended to be inserted between two adjacent vertebrae, of the type comprising a core (4;
104;
204;
304;
404;
504;
604) made of an elastic material comprising a silicone polymer or an elastomer, covered, over part of its periphery, by a casing (6;
106;
206;
306;
406;
606) made of a rigid material and intended to be in contact with the said two adjacent vertebrae, characterized in that the said core comprises, in cross section, two end portions (8;
108;
308;
408;
608′
, 608″
), connected by a middle portion (12;
138;
312;
412;
612′
, 612″
), the said casing comprises two covers (6;
106;
206;
306;
416;
606) provided with a threading and respectively covering, at least partially, the outer periphery of the said end portions (8;
108;
308;
408;
608′
, 608″
), and the distance separating the said covers increases towards the anterior part of the prosthesis.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a prosthesis (2) designed to be inserted between two neighboring vertebrae, comprising a core (4) made of an elastic material and covered, over part of its periphery, with a rigid material coating (6) designed to be in contact with the two neighboring vertebrae. The core (4) comprises, in transverse cross-section, two end portions (8) linked by a median portion (12) and said coating includes two caps provided with a threading and covering at least partially the external periphery of the end portions (8), the distance separating the caps increasing towards the prosthesis front part.
411 Citations
19 Claims
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1. Partial disc prosthesis (2;
-
102;
202;
302;
402;
602) intended to be inserted between two adjacent vertebrae, of the type comprising a core (4;
104;
204;
304;
404;
504;
604) made of an elastic material comprising a silicone polymer or an elastomer, covered, over part of its periphery, by a casing (6;
106;
206;
306;
406;
606) made of a rigid material and intended to be in contact with the said two adjacent vertebrae, characterized in that the said core comprises, in cross section, two end portions (8;
108;
308;
408;
608′
, 608″
), connected by a middle portion (12;
138;
312;
412;
612′
, 612″
), the said casing comprises two covers (6;
106;
206;
306;
416;
606) provided with a threading and respectively covering, at least partially, the outer periphery of the said end portions (8;
108;
308;
408;
608′
, 608″
), and the distance separating the said covers increases towards the anterior part of the prosthesis. - View Dependent Claims (2, 3, 4, 8, 9, 10, 11, 12, 13, 14, 15)
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102;
-
5. A disc prosthesis to insert between two adjacent vertebrae, comprising:
-
a core comprised of one or more elastic materials, said core including a pair of end portions;
a casing at least partially enclosing said core, said casing including two rigid covers positioned opposite one another, said core being positioned between said covers, said covers each including threading and being arranged with a distance separating said covers that increases from one of said end portions to another of said end portions. - View Dependent Claims (6, 7)
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-
16. An apparatus, comprising:
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a disc prosthesis arranged to be placed between two adjacent vertebrae, said prosthesis including a core comprised of one or more elastic materials, said core including a pair of end portions and a casing at least partially enclosing said core, said casing including two rigid covers positioned opposite one another, said core being positioned between said covers, said covers each including threading and being arranged with a distance separating said covers that increases from one of said end portions to another of said end portions; and
implantation instrumentation including a rod and a handle connected to a pair of opposing tongues, said tongues being configured to selectively engage said covers and said handle defining an orifice to receive a rod therethrough to selectively contact said disc prosthesis. - View Dependent Claims (17, 18, 19)
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Specification