Patent ID: 6162252
Filing Date: 2000-12-19
Classification: A61F

Abstract:
A spinal disc prosthesis to replace a damaged spinal disc in a spinal column of a human, said spinal disc prosthesis comprising:an upper rigid plate having an outer perimeter;a lower rigid plate having an outer perimeter;a body of elastomeric material located between and bonded to said upper and lower rigid plates, said body of elastomeric material including a main portion and a peripheral portion extending around said main portion;said upper and lower plates each having a curved convex plate surface extending around said respective outer perimeters and facing said peripheral portion of said body of elastomeric material;said peripheral portion of said body of elastomeric material having a first part which is bonded to said curved convex plate surfaces of said upper and lower plates and extends toward said main portion, said first part of said peripheral portion increasing in thickness as said first part extends from said curved convex plate surfaces toward said main portion;said first part of said peripheral portion of said body of elastomeric material having a convexly curved outer surface which forms a part of the outer surface of said body of elastomeric material.