Anterior spinal instrumentation and method for implantation and revision
a spinal instrument and anterior spinal technology, applied in the field of spinal instrumentation system, can solve the problems of significant compromise of vertebral body, loss of reduction or correction, and loss of correction, and achieve the effect of enhancing rigidity and fixation, and more reliable and complete decompression of spinal canals
a spinal instrument and anterior spinal technology, applied in the field of spinal instrumentation system, can solve the problems of significant compromise of vertebral body, loss of reduction or correction, and loss of correction, and achieve the effect of enhancing rigidity and fixation, and more reliable and complete decompression of spinal canals
USRE37161E1Inactive Publication Date: 2001-05-01MICHELSON GARY K +1
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For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
Referring now to FIG. 1, initial steps of the surgical technique contemplated by the present invention are illustrated. In particular, the invention contemplates anterior fixation of several vertebral segments, identified as vertebra vertebrae V.sub.1 -V.sub.4 and their adjacent discs D.sub.1 -D.sub.4. This anterior instrumentation could be used, for instance, to correct a lumbar scoliosis condition followed by fusio...
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A system and method for anterior fixation of the spine utilizes a cylindrical implant engaged in the intradiscal space at the cephalad and caudal ends of the construct. The implants are cylindrical fusion devices (10) filled with bone material to promote bone ingrowth and fusion of the disc space. An attachment member (40) is connected to each of the fusion devices (10) and bone screws (30) having similar attachment members (33) are engaged in the vertebral bodies of the intermediate vertebrae. A spinal rod (50) is connected to each of the attachment members using an eyebolt assembly (53, 54, 55). In a further inventive method, a revision of the construct is achieved by removing the fusion devices. Each fusion device is engaged by an elongated guide member (62) over which a cylindrical trephine (70) is advanced. The trephine (70) has an inner diameter larger than the diameter of the fusion implant and includes cutting teeth (72) for extracting a core (84) of bone material around the fusion implant. The trephine (70) and guide member (62) are removed along with the bone core (84) containing the fusion implant (10). The trephine (70) is also used to extract a bone dowel from a solid bone mass to be inserted into the space left by the removed bone core (84).
Description
BACKGROUND OF THE INVENTIONThe present invention concerns a spinal instrumentation system utilizing elongated members extending along the length of the spine and attached to multiple vertebrae by fixation elements, such as bone screws. In particular, the invention concerns anterior instrumentation, together with a surgical technique for implanting the instrumentation. The invention also contemplates a surgical revision technique for this spinal instrumentation.Historically, correction of spinal disorders and treatment of spinal injuries was approached posteriorly, or namely from the back of the patient. Initially, the anterior approach to spinal instrumentation, that is from the front and side of the patient, was not favored, due to the unfamiliarity of this approach to spinal surgeons and due to the fear of severe complications, such as neurovascular injury or compromise of the spinal cord. However, in the face of some reported difficulties in addressing correction of thoracolumbar...
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Patent Timeline
01 May 2001
Publication
USRE37161E1
- IPC
- A61B17/16; A61B17/70; A61B17/58; A61F2/00; A61F2/28; A61F2/30; A61F2/44; A61F2/46
- CPC
- A61B17/1637; A61B17/1671; A61B17/7011; A61B17/7032; A61B17/7041; A61F2/442; A61F2/4455; A61F2/446
- Inventors
- MICHELSON, GARY K.; BOYD, LAWRENCE M.