Systems and methods for fixation of adjacent vertebrae

a technology for fixing systems and adjacent vertebrae, which is applied in the field of internal fixation of vertebrae of the spine, can solve the problems and achieves the effect of reducing the risk of pin tract secretions or infections, or the potential of osteomyelitis

Inactive Publication Date: 2005-02-17
MATHEWS HALLETT H
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] The present invention contemplates a percutaneous fusion technique using subcutaneous suprafascial internal fixation. More particularly, the minimally invasive technique of the present invention permits anterior fusion of the disc space of the lumbar spine following appropriate disc resection and bone grafting.

Problems solved by technology

Thus, none of the muscle tissue is destroyed and the subcutaneous nature of the procedure great

Method used

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  • Systems and methods for fixation of adjacent vertebrae
  • Systems and methods for fixation of adjacent vertebrae
  • Systems and methods for fixation of adjacent vertebrae

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Embodiment Construction

[0019] For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment 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.

[0020] The present invention first contemplates steps for a percutaneous fusion technique, such as may be used to fuse adjacent vertebrae after disc tissue has been removed. According to the preferred embodiment of the invention, the method is conducted on lumbar vertebrae, although it is believed to be adaptable to other portions of the spine. The patient, after appropriate preparation, is positioned prone o...

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Abstract

A method for internal fixation of vertebra of the spine to facilitate graft fusion includes steps for excising the nucleus of an affected disc, preparing a bone graft, instrumenting the vertebrae for fixation, and introducing the bone graft into the resected nuclear space. Disc resection is conducted through two portals through the annulus, with one portal supporting resection instruments and the other supporting a viewing device. The fixation hardware is inserted through small incisions aligned with each pedicle to be instrumented. The hardware includes bone screws, fixation plates, engagement nuts, and linking members. In an important aspect of the method, the fixation plates, engagement nuts and linking members are supported suprafascially but subcutaneously so that the fascia and muscle tissue are not damaged. The bone screw is configured to support the fixation hardware above the fascia. In a further aspect of the invention, a three component dilator system is provided for use during the bone screw implantation steps of the method.

Description

BACKGROUND OF THE INVENTION [0001] The present invention concerns a method for internal fixation of vertebra of the spine. [0002] It has long been known that internal fixation is an adjunct to fusion, such as a transverse process fusion. In early prior art techniques, a surgeon made an incision in the patient's back and separated tissue and muscle in order to expose a wide area of the spine in which the procedure was to take place. The fusion and fixation in one prior art process is by grafting bone segments between opposing transverse processes of adjacent vertebrae. However, this technique resulted in gross destruction of normal anatomy as well as high blood loss. Moreover, this surgical technique did not completely stabilize the vertebra since there was no direct connection between the vertebral bodies. [0003] In more recent times, a surgical technique known as dowel interbody fusion has been developed. In this technique, bores are formed in disc tissue through either open surger...

Claims

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Application Information

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IPC IPC(8): A61B17/70A61B17/86A61F2/00A61B17/60A61F2/28A61F2/44
CPCA61B17/70A61B17/7007A61B17/7049A61B17/7059A61B17/86A61F2/442A61F2220/0025A61F2002/2835A61F2002/2839A61F2002/30329A61F2002/448A61F2002/449A61F2/4455
Inventor MATHEWS, HALLETT H.
Owner MATHEWS HALLETT H
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