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US 7,727,233 B2Granted
Spinous process stabilization devices and methods
AssigneeWarsaw Orthopedic, Inc.
InventorsJonathan Blackwell, Aurelien Bruneau
Life of this patent
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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.
Claims21
An interspinous implant device comprising:
- a first plate having a medial face configured to abut adjacent spinous processes;
- a second plate having a medial face configured to abut the adjacent spinous processes;
- said second plate disposed in spaced relation to said first plate and having a longitudinal plate axis;
- the medial face of at least one of the first plate and the second plate comprising a plurality of inwardly projecting projections;
- 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 post pivotable relative to the first plate about a pivot axis;
- the pivot axis located opposite the second plate with respect to the medial face of the first plate;
- the pivot axis oriented normal to a theoretical plane disposed generally perpendicular to the medial face of the first plate and containing the longitudinal post axis;
- the post pivotable about the pivot axis such that the first and second plates may thereby be displaced relative to each other in a direction lying in the theoretical plane and transverse to the post longitudinal axis;
- 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;
- the second plate having a first bore;
- the post extending from the medial face of the first plate through at least a portion of the first bore;
- a spacer positioned about the post and disposed between the first and second plates;
- a locking mechanism associated with the second plate;
- wherein the second plate is moveable along the post toward the first plate and lockable relative thereto via engagement of the locking mechanism with the post.
12 more elements
A method for stabilizing adjacent spinous processes, comprising:
- providing an assembly having a first plate, a second plate disposed in spaced relation to the first plate, a post movably connecting the second plate to the first plate and extending along a longitudinal post axis, and a spacer disposed between the first and second plates and about the post;
- positioning the first plate along a first side of the adjacent spinous processes such that a medial face of the first plate is oriented toward the spinous processes;
- disposing the post;
- between the spinous processes so as to extend through a sagittal plane defined thereby
- positioning a second plate along a second side of the adjacent spinous processes such that a medial face of the second plate is oriented toward the spinous processes;
- the second plate having a first bore oriented generally perpendicular to the second plate's medial face;
- inserting the post into the first bore in the second plate so that the post axis extends through the first bore;
- adjusting the distance between the first and second plates by moving the second plate along the post;
- pivoting the post relative to the first plate about a pivot axis to change the relative positions of the first and second plates;
- the pivot axis located opposite the second plate with respect to the medial face of the first plate;
- the pivot axis oriented normal to a theoretical plane disposed generally perpendicular to the medial face of the first plate and containing the longitudinal post axis;
- the pivoting comprising pivoting the post about the pivot axis such that the first and second plates are thereby displaced relative to each other in a direction lying in the theoretical plane and transverse to the post longitudinal axis;
- locking the second plate relative to the post so as to secure the second plate along the post in spaced relation to the first plate.
10 more elements
Dependencies are inferred from the claim text.