SPINAL SURGERY INTERBODY
First Claim
1. An interbody spinal fusion implant for insertion between vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, the implant comprising:
- a posterior portion of the implant shaped to interface with an insertion tool;
an anterior portion of the implant opposite the posterior portion of the implant;
a pair of medial-lateral side walls of the implant between the posterior and anterior portions of the implant, wherein the posterior portion, anterior portion and medial lateral sidewalls define an implant body having a cephalad surface, a caudal surface and defining a fusion promotion cavity extending between the cephalad surface and the caudal surface; and
wherein at least one of the side walls defines a hole from the exterior of the implant to the fusion promotion cavity, the side wall hole being substantially centered about a primary axis of impact and being tapered toward the posterior portion of the Implant along the axis of impact.
4 Assignments
0 Petitions
Accused Products
Abstract
An inter-vertebral implant wherein at least one of the side walls defining a hole from the exterior of the implant to the fusion promotion cavity and having a posterior portion and an anterior portion, the side wall hole being elongated in a direction between the posterior and anterior ends of the side wall hole. In some embodiments, the side wall hole is tapered toward the posterior portion of the implant and can be tear drop shaped. In some embodiments the cephalad and caudal surfaces may be convex with radii of curvature which can be the same for all implant sizes. The surfaces may include teeth which can extend beyond a central cavity. A nose, tapered in the saggital and transverse planes may be included on the anterior end of the implant. Some embodiments also include a threaded hole (with a depth that can be the same for all implant sizes) and an adjoining slot for engaging an insertion instrument. Each of the portions of the implant can have the same length for all implant sizes.
179 Citations
30 Claims
-
1. An interbody spinal fusion implant for insertion between vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, the implant comprising:
-
a posterior portion of the implant shaped to interface with an insertion tool; an anterior portion of the implant opposite the posterior portion of the implant; a pair of medial-lateral side walls of the implant between the posterior and anterior portions of the implant, wherein the posterior portion, anterior portion and medial lateral sidewalls define an implant body having a cephalad surface, a caudal surface and defining a fusion promotion cavity extending between the cephalad surface and the caudal surface; and wherein at least one of the side walls defines a hole from the exterior of the implant to the fusion promotion cavity, the side wall hole being substantially centered about a primary axis of impact and being tapered toward the posterior portion of the Implant along the axis of impact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An interbody spinal fusion implant for insertion between vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, the implant comprising:
-
a posterior portion of the implant defining a threaded instrument engagement hole for engagement with an instrument for inserting the implant in the implantation space, the posterior portion of the implant defining an instrument engagement notch adjoining the instrument engagement hole, the instrument engagement hole having a depth in a direction substantially along the axis of impact; an anterior portion of the implant opposite the posterior portion of the implant and including a nose tapered in the saggital and transverse planes; a first and a second elongated fluoroscopy marker located toward a posterior end of the implant; a third fluoroscopy marker located toward an anterior end of the implant, wherein the third fluoroscopy marker has approximately the same cross sectional area as the first fluoroscopy marker in a first viewing plane and has a different cross sectional area than the first fluoroscopy marker in a second viewing plane orthogonal to the first viewing plane; a pair of medial-lateral side walls of the implant between the posterior portion and anterior portion of the implant, wherein the anterior portion, posterior portion, and medial-lateral sidewalls define an implant body having a convex cephalad surface and a convex caudal surface, the implant body defining a fusion promotion cavity extending from the convex cephalad surface to the convex caudal surface; wherein at least one of the medial-lateral side walls defines a hole from the exterior of the implant to the fusion promotion cavity, the side wall hole being substantially centered about the axis of impact and being tapered towards the posterior portion of the implant; and wherein at least one of the convex cephalad surface or the convex caudal surface define teeth extending beyond the cavity toward at least one of the anterior portion or posterior portion of the implant, wherein the height of the teeth is defined by a radius of curvature for a corresponding convex surface. - View Dependent Claims (11, 12)
-
-
13. A surgical kit for surgery on human spines, the kit comprising:
-
a set of different sized interbody spinal fusion implants for insertion within implantation spaces formed within a disc space, each implant comprising; a posterior portion shaped to interface with an insertion tool; an anterior portion opposite the posterior portion of the implant; a pair of medial-lateral side walls of the implant between the posterior and anterior portions of the implant, wherein the posterior portion, anterior portion and medial lateral sidewalls define an implant body having a cephalad surface, a caudal surface and defining a fusion promotion cavity extending between the cephalad surface and the caudal surface; and wherein at least one of the side walls defines a hole from the exterior of the implant to the fusion promotion cavity, the side wall hole being substantially centered about a primary axis of impact and being tapered toward the posterior portion of the implant along the axis of implant. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A method of manufacturing an interbody spinal fusion implant for insertion within an implantation space formed across the height of a disc space between vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, the method comprising:
-
forming a posterior portion of the implant shaped to interface with an insertion tool; forming an anterior portion of the implant opposite the posterior end of the implant; forming a pair of medial-lateral side walls of the implant between the posterior and anterior portions of the implant, wherein the posterior portion, anterior portion and medial lateral sidewalls define an implant body having a cephalad surface, a caudal surface and defining a fusion promotion cavity extending between the cephalad surface and the caudal surface; forming a hole in at least one of the medial-lateral side walls from the exterior of the implant to the fusion promotion cavity, the side wall hole being substantially centered about a primary axis of impact and being tapered toward the posterior portion of the implant along the axis of impact; and forming a set of teeth into at least one of the cephalad or caudal surfaces. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification