US2014371858A1PendingUtilityA1

Intervertebral disc

56
Assignee: DEPUY SYNTHES PRODUCTS LLCPriority: Jun 27, 2002Filed: Aug 29, 2014Published: Dec 18, 2014
Est. expiryJun 27, 2022(expired)· nominal 20-yr term from priority
Inventors:Christopher RogersAndrew DoorisPatrick FatyolMark LionettoRonald NaughtonJohn Riley Hawkins
A61F 2002/30253A61F 2002/30515A61F 2002/304A61F 2250/0039A61F 2250/0098A61F 2002/30939A61F 2002/30433A61F 2230/0069A61F 2002/30883A61F 2002/30232A61F 2002/30649A61F 2002/30495A61F 2002/30462A61F 2002/30481A61F 2002/30245A61F 2310/00239A61F 2002/443A61F 2002/30843A61F 2310/0058A61F 2002/30369A61F 2/442A61F 2310/00017A61F 2230/0076A61F 2310/00023A61F 2/4611A61F 2/30767A61F 2210/0004A61F 2002/30578A61F 2002/302A61F 2002/30383A61F 2002/30892A61F 2220/0075A61F 2220/0033A61F 2210/0014A61F 2220/0041A61F 2002/30327A61F 2002/30224A61F 2310/00796A61F 2/30724A61F 2002/30062A61F 2002/30841A61F 2230/0065A61F 2002/30878A61F 2002/30604A61F 2310/00203A61F 2002/30092A61F 2/08A61F 2002/2817A61F 2002/3082A61F 2002/305A61F 2002/30733A61F 2002/30566A61F 2002/30387A61F 2002/30528A61F 2002/3008A61F 2002/30662A61F 2310/00029A61F 2/4425A61F 2230/0071A61F 2220/0025A61F 2002/30565A61F 2002/30563A61F 2002/30838A61F 2/44
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Claims

Abstract

This invention relates to an intervertebral motion disc having two motion surfaces and. wherein the radius of the upper articulation surface of the core member is greater than the radius of the lower articulation surface of the core member, and wherein the first articulation surface of the core member is spherical and the second articulation surface of the core member is curved and non-spherical.

Claims

exact text as granted — not AI-modified
We claim: 
     
         1 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, 
       wherein the core has a blind recess extending into the core from the flat surface, and wherein the recess is non-articulating. 
     
     
         2 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, and 
       wherein the core has a diameter and a blind recess extending from diametrically through the core. 
     
     
         3 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, and 
       wherein the lower endplate further comprises a post, wherein the core comprises a recess, and wherein an upper face of the post is received in the recess. 
     
     
         4 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, and 
       wherein the core has a recess extending therein, the lower endplate has a post extending therefrom, and wherein the post has an inner portion that is fully contained within the recess. 
     
     
         5 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, and 
       wherein the endplate has a projection extending therefrom, and wherein the core has a sidewall having a retaining feature that cooperates with the projection. 
     
     
         6 . An intervertebral motion disc comprising:
 a) an upper prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with an upper vertebral body, 
 ii) an inner surface having a first articulation surface, 
   b) a lower prosthetic vertebral endplate comprising:
 i) an outer surface adapted to mate with a lower vertebral body, and 
 ii) an inner surface having a first articulation surface, 
   c) a core member comprising:
 i) an upper articulation surface adapted for articulation with the first articulation surface of the upper endplate and having a radius, and 
 ii) a lower articulation surface adapted for articulation with the first articulation surface of the lower endplate and having a radius, 
   
       wherein the core member is disposed between the endplates and oriented therein to produce an upper articulation interface between the first articulation surface of the upper endplate and the upper articulation surface of the core member, and a lower articulation interface between the first articulation surface of the lower endplate and the lower articulation surface of the core member, and 
       wherein the upper articulation interface forms a hemispherical interface, and the lower articulation interface forms a flat interface, and 
       wherein the endplate has a recess depth (DE CH ) that is greater than a peripheral endplate depth (DE P ), and the recess depth extends past a plane of the peripheral outer surface of end plate.

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