Facet joint prosthesis

摘要

A facet joint prosthesis comprising an inferior prosthetic portion and a superior prosthetic portion is disclosed. Inferior prosthetic portion includes a first anchor member and a first articulating member and superior prosthetic portion includes a second anchor member and a second articulating member. The first articulating member comprises a support portion and first articulating surface and the second articulating member comprises a second articulating surface, and first and second articulating surfaces are configured and dimensioned to contact or engage one another. A flexible element is positioned between the support portion and the first articulating surface.

主权项

1. A spinal implant comprising:
a superior member comprising a first anchor portion and a first articulating portion; and an inferior member comprising a second anchor portion and a second articulating portion; wherein the first articulating portion comprises a ball and the second articulating portion comprises a socket to receive the ball, wherein the first articulating portion is capable of articulating with respect to the second articulating portion, wherein the inferior member having a length extending from a distal-most end to a proximal-most end and comprises a spring that is housed within a slot positioned inside the inferior member, the spring extending greater than half the length of the inferior member, and wherein the first anchor portion and the first articulating portion are configured to be a unitary piece of the superior member.