Spinous Process Stabilization Devices and Methods
First Claim
Patent Images
1. A spinal implant comprising:
- a first plate having a medial face configured to confront adjacent spinous processes;
a second plate having a medial face configured to confront the adjacent spinous processes;
said second plate disposed in spaced relation to said first plate;
a post connecting the second plate to the first plate and extending along a longitudinal post axis oriented transverse to the medial face of the second plate;
the second plate having a first bore passing through the medial face of the second plate generally normal thereto;
the post extending from the medial face of the first plate such that the post longitudinal axis is aligned to extend through the first bore;
wherein the medial faces of each of the plates extend from the post in opposite directions therefrom between a cephalad end of the respective plate that is positionable along a cephaladly located spinous process and a caudal end of the respective plate positionable along a caudally located spinous process;
a resiliently deformable spacer having a longitudinal spacer axis and a passage extending along the longitudinal spacer axis;
the spacer positioned about the post and disposed between the first and second plates with the post extending through the passage;
the spacer distinct from both the first and second plates;
a locking mechanism distinct from the spacer and operative to secure the second plate in position relative to the post;
wherein the second plate is moveable along the post toward the first plate and lockable at an infinite number of positions relative thereto via engagement of the locking mechanism with the post.
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Abstract
Devices and methods for supporting adjacent spinous processes include opposing plates movable toward one another along a cross post to contact opposite sides of each of the spinous processes, and a spacer member about the cross post contacting the adjacent surfaces of the spinous processes to resist movement of the spinous processes toward one another under spinal extension motion.
198 Citations
16 Claims
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1. A spinal implant comprising:
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a first plate having a medial face configured to confront adjacent spinous processes; a second plate having a medial face configured to confront the adjacent spinous processes;
said second plate disposed in spaced relation to said first plate;a post connecting the second plate to the first plate and extending along a longitudinal post axis oriented transverse to the medial face of the second plate; the second plate having a first bore passing through the medial face of the second plate generally normal thereto;
the post extending from the medial face of the first plate such that the post longitudinal axis is aligned to extend through the first bore;wherein the medial faces of each of the plates extend from the post in opposite directions therefrom between a cephalad end of the respective plate that is positionable along a cephaladly located spinous process and a caudal end of the respective plate positionable along a caudally located spinous process; a resiliently deformable spacer having a longitudinal spacer axis and a passage extending along the longitudinal spacer axis;
the spacer positioned about the post and disposed between the first and second plates with the post extending through the passage;
the spacer distinct from both the first and second plates;a locking mechanism distinct from the spacer and operative to secure the second plate in position relative to the post; wherein the second plate is moveable along the post toward the first plate and lockable at an infinite number of positions relative thereto via engagement of the locking mechanism with the post. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A spinal implant comprising:
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a first plate having a medial face configured to confront adjacent spinous processes; a second plate having a medial face configured to confront the adjacent spinous processes;
said second plate disposed in spaced relation to said first plate;a post connecting the second plate to the first plate and extending along a longitudinal post axis oriented transverse to the medial face of the second plate; the second plate having a first bore passing through the medial face of the second plate generally normal thereto;
the post extending from the medial face of the first plate such that the post longitudinal axis is aligned to extend through the first bore;wherein the medial faces of each of the plates extend from the post in opposite directions therefrom between a cephalad end of the respective plate that is positionable along a cephaladly located spinous process and a caudal end of the respective plate positionable along a caudally located spinous process; a resiliently deformable spacer having a longitudinal spacer axis and a passage extending along the longitudinal spacer axis;
the spacer positioned about the post and disposed between the first and second plates with the post extending through the passage such that the spacer is rotatable about the post longitudinal axis;wherein the spacer is distinct from both the first and second plates and has a cross-section shape normal to post longitudinal axis with a generally flat section and outwardly convex sections disposed on opposing sides of the generally flat section; a locking mechanism distinct from the spacer and associated with the second plate; wherein the second plate is moveable along the post toward the first plate and lockable at an infinite number of positions relative thereto via engagement of the locking mechanism with the post; wherein the first and second plates are unconnected to each other by other portions of the implant except through the post, spacer, and locking mechanism.
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15. A spinal implant comprising:
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a first plate having a medial face configured to confront adjacent spinous processes; a second plate having a medial face configured to confront the adjacent spinous processes;
said second plate disposed in spaced relation to said first plate;a post connecting the second plate to the first plate and extending along a longitudinal post axis oriented transverse to the medial face of the second plate; the second plate having a first bore passing through the medial face of the second plate generally normal thereto;
the post extending from the medial face of the first plate such that the post longitudinal axis is aligned to extend through the first bore;wherein the medial faces of each of the plates extend from the post in opposite directions therefrom between a cephalad end of the respective plate that is positionable along a cephaladly located spinous process and a caudal end of the respective plate positionable along a caudally located spinous process; a spacer having a longitudinal spacer axis and a bore extending along the longitudinal spacer axis;
the spacer rotatably positioned about the post and disposed between the first and second plates with the post extending through the bore;
the spacer distinct from both the first and second plates;
the spacer having an external surface;a locking mechanism distinct from the spacer and operative to secure the second plate in position relative to the post; wherein the second plate is moveable along the post toward the first plate and lockable at an infinite number of positions relative thereto via engagement of the locking mechanism with the post; wherein the spacer external surface is configured to abut the spinous processes when the implant is disposed between the spinous processes with the medial faces of the first and second plates confronting the spinous processes and the post extending through a sagittal plane defined by the spinous processes. - View Dependent Claims (16)
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Specification