Back to results
US 7,008,452 B2Granted
Dual durometer elastomer artificial disc
AssigneeDepuy Acromed, Inc.
InventorJohn R. Hawkins
Life of this patent
Estimating the term…
Abstract
An intervertebral motion disc comprising core material surrounded by a non-resorbable outer shell having a sidewall surrounding the core, wherein the sidewall of the outer shell has a hardness of more than 80 Shore A.
Claims25
A prosthetic intervertebral disc comprising:
- a) a central core material having an upper surface, a lower surface and sidewalls therebetween,
- b) a non-resorbable one piece outer shell having an inner surface surrounding the central core and contacting the upper surface, the lower surface and the sidewalls of the central core, wherein one of the upper and lower surfaces of the outer shell comprises a recess for receiving a pin, the recess extending from the upper or lower surface and extending into the central core and
- c) a pin extending from the upper or lower surface through the recess and received in a cavity in the central core
- wherein the outer shell has an upper wall having an upper surface having a dry coefficient of friction against bone of at least 0.5.
1 more element
Dependencies are inferred from the claim text.