Devices to prevent spinal extension
First Claim
1. Apparatus for preventing full extension between upper and lower vertebral bodies, each having spinous processes and lamina, the apparatus comprising:
- a generally transverse member extending between the spinous processes and lamina of the upper and lower vertebral bodies, thereby inhibiting full extension.
1 Assignment
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Accused Products
Abstract
This invention resides in apparatus for inhibiting full extension between upper and lower vertebral bodies, thereby preventing pain and other complications associated with spinal movement. In the preferred embodiment, the invention provides a generally transverse member extending between the spinous processes and lamina of the upper and lower vertebral bodies, thereby inhibiting full extension. Various embodiments of the invention may limit spinal flexion, rotation and/or lateral bending while preventing spinal extension. In the preferred embodiment, the transverse member is fixed between two opposing points on the lower vertebral body using pedicle screws, and a cushioning sleeve is used as a protective cover. The transverse member may be a rod or cable, and the apparatus may be used with a partial or full artificial disc replacement. To control spinal flexion, rotation and/or lateral bending one or more links may be fastened to an adjacent vertebral body, also preferably using a pedicle screw. Preferably a pair of opposing links are used between the upper and lower vertebral bodies for such purposes. Alternative embodiments use stretchable elements with or without a transverse member.
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Citations
16 Claims
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1. Apparatus for preventing full extension between upper and lower vertebral bodies, each having spinous processes and lamina, the apparatus comprising:
a generally transverse member extending between the spinous processes and lamina of the upper and lower vertebral bodies, thereby inhibiting full extension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for preventing full extension between upper and lower vertebral bodies, comprising:
a stretchable element connected between the upper and lower vertebral bodies in a compressed state, thereby allowing at least a limited degree of spinal flexion, lateral bending and axial rotation while inhibiting spinal extension. - View Dependent Claims (11, 12, 13, 14, 15, 16)
Specification