Facet arthroplasty devices and methods

Inactive Publication Date: 2005-06-23
GMEDELAWARE 2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] Another aspect of the invention provides surgical procedures for performing replacements of various facets and lamina in the spine, as well as surgical instruments for facilitating performance o

Problems solved by technology

Furthermore, although patients with one or two levels of spinal stenosis tend to do reasonably well with just a one to two level wide decompressive laminectomy, patients whose spinal stenosis is associated with degenerative spondylolisthesis have not seen good results.
Although patients who undergo concomitant arthrodesis do demonstrate a significantly better outcome with less chance of further vertebral slippage after laminectomy, arthrodesis poses problems of its own.
Aside from the occurrence of further spondylolisthesis in some patients, additional effects include non-unions, slow rate of fusion even with autografts, an

Method used

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  • Facet arthroplasty devices and methods
  • Facet arthroplasty devices and methods
  • Facet arthroplasty devices and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

I. Anatomy of Lumbar Vertebrae

[0063]FIGS. 27 and 28 show the fourth and fifth lumbar vertebrae L4 and L5, respectively, in a lateral view (while in anatomic association) and in a superior view (separately). The lumbar vertebrae (of which there are a total of five) are in the lower back, also called the “small of the back.”

[0064] As is typical with vertebrae, the vertebrae L4 and L5 are separated by an intervertebral disk 25. The configuration of the vertebrae L4 and L5 differ somewhat, but each (like vertebrae in general) includes a vertebral body 10, which is the anterior, massive part of bone that gives strength to the vertebral column and supports body weight. The vertebral arch 12 is posterior to the vertebral body 10 and is formed by the right and left pedicles 14 and lamina 16. The pedicles 14 are short, stout processes that join the vertebral arch 12 to the vertebral body 10. The pedicles 14 project posteriorly to meet two broad flat plates of bone, called the lamina 16.

[006...

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PUM

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Abstract

Devices and surgical methods treat various types of adult spinal pathologies, such as degenerative spondylolisthesis, spinal stenosis, degenerative lumbar scoliosis, and kypho-scoliosis. Various types of spinal joint replacement prostheses, surgical procedures for performing spinal joint replacements, and surgical instruments are used to perform the surgical procedures.

Description

RELATED APPLICATIONS [0001] This application is a divisional of co-pending application Ser. No. 09 / 693,272 filed Oct. 20, 2000, which is a continuation-in-part of U.S. Provisional Patent Application Ser. No. 60 / 160,891, filed Oct. 22, 1999, and entitled “Facet Arthroplasty Devices and Methods,” which is incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention generally relates to devices and surgical methods for the treatment of various types of spinal pathologies. More specifically, the present invention -is directed to several different types of spinal joint replacement prostheses, surgical procedures for performing spinal joint replacements, and surgical instruments which may be used to perform the surgical procedures. BACKGROUND OF THE INVENTION [0003] Back pain is a common human ailment. In fact, approximately 50% of persons who are over 60 years old suffer from lower back pain. Although many incidences of back pain are due to sprains or muscle strai...

Claims

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Application Information

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IPC IPC(8): A61B17/00A61B17/16A61B17/86A61F2/00A61F2/02A61F2/28A61F2/30A61F2/44A61F2/46
CPCA61B17/1671Y10S606/902A61F2/28A61F2/4405A61F2002/30387A61F2002/30433A61F2002/305A61F2002/30537A61F2002/30604A61F2002/30777A61F2002/30874A61F2002/449A61F2002/4631A61F2220/0025A61F2220/0041A61F2250/0004A61F2310/00017A61F2310/00023A61F2310/00029A61F2310/00131A61F2310/00179A61F2310/00329A61F2310/00604A61F2310/00634A61F2310/0097A61F2310/00976Y10S623/902Y10S606/907Y10S606/91A61B17/86A61F2002/30873A61B17/7064A61B17/7068A61B17/8605
Inventor REILEY, MARK A.
Owner GMEDELAWARE 2
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