US 12,138,171 B2
Artificial intervertebral disc with lower height
Malan de Villiers, Wapadrand (ZA); Neville Jansen, Pretoria (ZA); and Yves Arramon, Sunnyvale, CA (US)
Assigned to Simplify Medical Pty Ltd., Melbourne (AU)
Filed by Simplify Medical Pty Ltd, Melbourne (AU)
Filed on May 19, 2022, as Appl. No. 17/664,071.
Application 17/664,071 is a continuation of application No. 16/709,286, filed on Dec. 10, 2019, granted, now 11,357,633.
Application 16/709,286 is a continuation of application No. 15/841,738, filed on Dec. 14, 2017, granted, now 10,517,733, issued on Dec. 31, 2019.
Application 15/841,738 is a continuation of application No. 15/584,369, filed on May 2, 2017, granted, now 9,883,945, issued on Feb. 6, 2018.
Application 15/584,369 is a continuation of application No. 15/234,983, filed on Aug. 11, 2016, granted, now 9,668,878, issued on Jun. 6, 2017.
Application 15/234,983 is a continuation of application No. 14/285,411, filed on May 22, 2014, granted, now 9,439,775, issued on Sep. 13, 2016.
Application 14/285,411 is a continuation of application No. 12/400,221, filed on Mar. 9, 2009, granted, now 8,764,833, issued on Jul. 1, 2014.
Claims priority of provisional application 61/069,048, filed on Mar. 11, 2008.
Prior Publication US 2022/0273445 A1, Sep. 1, 2022
Int. Cl. A61F 2/44 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/30771 (2013.01) [A61F 2/4425 (2013.01); A61F 2/4455 (2013.01); A61F 2002/30649 (2013.01); A61F 2002/30662 (2013.01); A61F 2002/30841 (2013.01); A61F 2002/30884 (2013.01); A61F 2002/30902 (2013.01); A61F 2002/443 (2013.01); A61F 2310/00407 (2013.01); A61F 2310/00604 (2013.01); A61F 2310/00796 (2013.01); A61F 2310/0088 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An intervertebral disc comprising:
an upper plate having: an upper vertebra contacting portion and a lower bearing surface portion, wherein the upper vertebra contacting portion of the upper plate includes:
a convex central portion,
a fin formed integrally with and extending outward from an upper surface of the convex central portion to define a height above the upper surface, the height being greater than a width of the fin, wherein the lower bearing surface portion has a concavity disposed opposite the convex central portion and wherein the convex central portion and the concavity have nesting curvatures, and
a transverse hole extending at least partially through the width of the fin, and sized for bone ingrowth;
a lower plate having a lower vertebra contacting surface and an upper bearing surface; and, wherein the lower vertebra contacting surface of the lower plate has a convex central portion, and wherein the upper bearing surface has a concavity disposed opposite the convex central portion and wherein the convex central portion and the concavity have nesting curvatures; and
a rigid core positioned between the upper and lower plates, the core having rigid upper and lower convex surfaces configured to slide and translate over the bearing surfaces of the upper and lower plates,
wherein the convex central portion of the upper plate is raised relative to a generally planar peripheral portion of the upper plate.