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US20060089717: Spinal prosthesis and facet joint prosthesis

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Filing Information

Inventor(s) Manoj Krishna · Tai Friesen ·
Assignee(s) KRISHNA MANOJ · FRIESEN TAI ·
Correspondent Michael E. Sellers;Gable & Gotwals ·
Application Number US11203259
Filing date 08/12/2005
Publication date 04/27/2006
Predicted expiration date 10/21/2024
U.S. Classifications 623/17.11  ·
International Classifications A61F244  ·
Kind CodeA1
Foreign Priority GB0422963 - 10/15/2004 · GB0516258 - 08/08/2005 ·
70 Claims, 40 Drawings


Abstract

A lumbar disc prosthesis is provided including a pair of disc members. The first member of the disc pair has a vertebral disc contact surface and a recessed portion on an opposing surface thereof. The second member of the disc pair has a vertebral disc contact surface and a protruding portion on an opposing surface thereof. The protruding portion of the second member engages with the recessed portion of the first member in use. Each of the first and second disc members are provided with at least three sections; a middle section and two end sections. The recessed and protruding portions are provided in the middle section of the respective disc members and each of the two end sections have a narrowing taper towards the ends of the disc members. The facet joint prosthesis includes a first member for attachment to a first posterior lumbar disc in use and a second member for attachment to a second posterior lumbar disc in use. At least a part of the first member is telescopically mounted in at least a part of the second member in use.

Independent Claims | See all claims (70)

  1. 1. A disc prosthesis, said disc prosthesis including a pair of disc members, a first member of said disc pair having a vertebral end plate contact surface and a recessed portion on an opposing surface thereof, a second member of said disc pair having a vertebral endplate contact surface and a protruding portion on an opposing surface thereof, the protruding portion of the second member engaging with the recessed portion of the first member in use, and wherein the inner or opposing surface of at least the first disc member is provided with at least three sections including a middle section and at least two end sections, the recessed portion being provided in the middle section and the thickness or depth of the middle section being less than the thickness or depth of the at least two end sections.
  2. 67. A facet joint prosthesis, said facet joint prosthesis including a first member for attachment to a first posterior disc in use and a second member for attachment to a second posterior disc in use, and wherein at least a part of said first member is telescopically mounted in at least a part of said second member in use.
  3. 68. A method of attachment of a lumbar disc prosthesis in a patient, said lumbar disc prosthesis including a pair of disc members, a first member of said disc pair having a vertebral endplate contact surface and a recessed portion on an opposing surface thereof, a second member of said disc pair having a vertebral endplate contact surface and a protruding portion on an opposing surface thereof, the protruding portion of the second member engaging in the recessed portion of the first member in use, the prosthesis including a further pair of disc members, said further pair of disc members also including first and second members, said method including the steps inserting each pair of disc members via a posterior route.
  4. 69. A method of attachment of a facet joint prosthesis in a patient, said facet joint prosthesis including a first member and a second member, at least a part of said first member is telescopically mounted in at least a part of said second member in use, said method including attaching a part of said first member to one of an upper or lower vertebrae in use posteriorly and attaching a part of said second member to the other of said upper or lower vertebrae in use posteriorly.
  5. 70. A lumbar disc prosthesis, said lumbar disc prosthesis including a pair of disc members, a first member of said disc pair having a vertebral endplate contact surface and a recessed portion on an opposing surface thereof, a second member of said disc pair having a vertebral endplate contact surface and a protruding portion on an opposing surface thereof, the protruding portion of the second member engaging in the recessed portion of the first member in use, and wherein the prosthesis includes a further pair of disc members, said further pair of disc members also including first and second members.

References Cited

The current document has no citations.

Referenced By

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