Radially expandable spinal interbody device and implantation tool

摘要

A spinal interbody device includes a base link having a first end and a second end, and a linkage including a first link having a first end and a second end and a second link having a first end and a second end. The first end of the first link is coupled to the first end of the base link at a first hinge, the second end of the first link is coupled to the first end of the second link at a second hinge; and the second end of the second link is coupled to the second end of the base link at a third hinge.

主权项

1. A spinal interbody device comprising:
a unitary base link having a first end and a second end; a linkage comprising:
a first link having a first end and a second end;a second link having a first end and a second end;wherein the first end of the first link is coupled to the first end of the base link at a first hinge;wherein the second end of the first link is coupled to the first end of the second link at a second hinge, wherein the second end of the first link and the first end of the second link have correspondingly shaped concave and convex portions such that the convex portion is received within the concave portion through a complete range of motion of the first link relative to the second link; andwherein the second end of the second link is coupled to the second end of the base link at a third hinge, and wherein the second end of the second link includes a convex end portion having a plurality of gear teeth configured to enable rotation of the second link about the third hinge through engagement with the plurality of gear teeth.