As regards this method of performing interbody spinal fusion using essentially cylindrical threaded implants, a special problem arises see FIG. The spinal fusion implant of the present invention is more efficacious than the prior art on an individual implant basis for the following reasons; 1.
Figure 5 is Spinal prothesis brantigan cages side elevational view of the implant plug of Figure 4. The spinal fusion implant of Spinal prothesis brantigan cages 22, further comprising a plurality of ratchetings facing the same direction extending from each of said opposed rigid portions for engaging each of the adjacent vertebral bodies to maintain said implant within the disc Spinal prothesis brantigan cages.
The spinal fusion implant of claim 12, in which said ratchetings face one direction. As regards this method of performing interbody spinal fusion using essentially cylindrical threaded implants, a special problem arises see FIG. As the screw 27 advances, the conical end 26 engages conically shaped recess 24, 25 of cage sections 16, 17 respectively.
This provides surfaces which will not tear or mangle the delicate nerves and blood vessels near the site of the spinal cord. The spinal fusion implant of claim 1, wherein said fusion promoting substance is contained within said implant.
Further, the Ray implant is unduly complex, because it would require the difficult, if not impossible, task of assembly within the disc space. Brantigan IF cages have been used in the clinical setting for ten years with. Branko Prpa; Melvin D.
These and other objects of the present invention will be apparent from a review of the accompanying drawings and the following detailed description of the drawings. Typical posterior heights for the wedge shaped plugs are 8.
The channels 15 include portions of this hard cortex bone so that the implants span the soft cancellous bone and rest on the hard cancellous bone The spinal fusion implant of the present invention relies on roughenings of the outer surface to enhance its stability.
The cage components can have bone graft or other osteoinductive or osteoconductive substance thereon for the purpose of enhancing bone fusion. The embodiment disclosed is the invention as presently contemplated. Although the invention has been described with respect to preferred embodiments, it is not to be so limited as changes and modifications can be made which are within the full intended scope of the invention as defined by the appended claims.
The spinal fusion implant of claim 23, wherein said protrusion comprises a ridge. This structure will cause these generally concave surfaces to better mate with the generally convex surfaces of the adjacent vertebral surfaces.
An example of a patent for a surgical prosthetic implant that is used in vertebral interbody fusion is the Brantigan U. The spinal fusion implant of claim 18, wherein said bone is compressively loaded in said implant.
A method for providing bio-compatible vertebral interbody fusion in the vertebral column comprising the steps of: In addition, the device could be implanted in a closed surgical technique through a transcutaneous cannula system.
Even more particularly the present invention relates to an expandable generally cylindrically shaped spinal cage prothesis that includes upper and lower components that can be incrementally separated from one another by an advancing screw until they are in contact with the vertebral plates of the involved spinal unit for use in vertebral fusion procedures.
In a spinal column where adjacent vertebrae have first and second opposed faces defining a space from which a disc has been removed, a device for replacing said disc comprising: The present invention also relates to a surgical method for installing the spinal cage prothesis.
The segment of the spinal column S comprises several vertebrae V and a disc space D between two adjacent vertebrae V. Note the smooth front surface of 16 and the other side walls.
Further, the spinal fusion implant of the present invention does not require rotation for its insertion and can be seated by linear advancement. The bone graft is packed between and beside two adjacent implants in full communication with their horizontal or lateral side slots which are also packed with bone graft material.
The spinal fusion implant of claim 2, wherein sold protrusion comprises a ridge. The spinal fusion implant of claim 22, wherein said implant is coated with said fusion promoting substance. Further, there would be insufficient room to safely rotate such a device for insertion as it is the very lack of such room that requires the use of a device having a decreased transverse width.
However, the reader should understand that various changes and modifications can be made without departing from the spirit of the present invention as described in the following claim.
The Michelson patent, also discloses an improved method of drilling holes across the disc space and into the two adjacent vertebrae and safely installing cylindrical implants such that the entire surgical procedure may be conducted through a hollow cylindrical tube.Sep 09, · Two of the spinal cages 10 are shown placed in the intervertebral space 14 between vertebrae 12, The cage can be implanted via a variety of surgical techniques.
These techniques include both open procedures from the anterior or posterior aspect of the body. Togawa D, Bauer T, Brantigan JW, Lowery GL () Bone graft incorporation in radiographically successful human intervertebral body fusion cages.
Spine – CrossRef PubMed Google Scholar A61F2/ — Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages substantially parallelepipedal, e.g.
having a rectangular or trapezoidal cross-section. An interbody fusion cage (colloquially known as a "spine cage") is a prosthesis used in spinal fusion procedures to maintain foraminal height and decompression. They are cylindrical or square-shaped devices, and usually threaded.
There are several varieties: the Harms cage, Ray cage, Pyramesh cage, InterFix cage, and lordotic LT cage, all of which are made from titanium; the Brantigan. A cage for use in a spinal repair system wherein a pair of inert, relatively open bone-graft contouring cages are disposed between adjacent vertebrae mounted to the boney structure of these vertebrae wherein the vertebrae will knit together and act as a single unit.
The upper and lower surfaces of the cages follow an arcuate path for increased. The present invention provides a device and methodology for use in spinal fusion surgeries. An implant is proved for forming a rigid structure between adjoining vertebrae in a patient.
The implant is a cage defined by at least a first end, second end, first side, and second side surface, wherein first and second side surfaces extend substantially parallel to each other to span a space between.Download