Interspinous process apparatus and method with a selectably expandable spacer
First Claim
Patent Images
1. An implant adapted to be inserted between adjacent spinous processes, said implant including:
- a first member and a second member;
said first member connected to said second member with a hinge;
said first member adapted to be positioned adjacent to a first of the adjacent spinous processes, and the second member adapted to be positioned adjacent to a second of the adjacent spinous processes;
a screw mechanism having a cam member rotatively engaged with a threaded shaft;
said screw mechanism positioned between the first member and the second member; and
wherein displacement of the cam member relative to the threaded shaft toward the hinge causes said cam member to urge the first member away from the second member in order to distract apart the first and second spinous processes.
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Abstract
The present invention is an interspinous process implant with a selectably expandable spacer that can be placed between adjacent spinous processes.
530 Citations
23 Claims
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1. An implant adapted to be inserted between adjacent spinous processes, said implant including:
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a first member and a second member; said first member connected to said second member with a hinge; said first member adapted to be positioned adjacent to a first of the adjacent spinous processes, and the second member adapted to be positioned adjacent to a second of the adjacent spinous processes; a screw mechanism having a cam member rotatively engaged with a threaded shaft; said screw mechanism positioned between the first member and the second member; and wherein displacement of the cam member relative to the threaded shaft toward the hinge causes said cam member to urge the first member away from the second member in order to distract apart the first and second spinous processes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for implanting an implant between adjacent spinous processes, the method including the steps of:
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laterally inserting the implant between adjacent spinous processes; wherein the implant includes; a first member and a second member; said first member connected to said second member with a hinge; said first member adapted to be positioned adjacent to a first of the adjacent spinous processes, and the second member adapted to be positioned adjacent to a second of the adjacent spinous processes; a screw mechanism; said screw mechanism positioned between the first member and the second member; operating the screw mechanism so that the first member is urged away from the second member in order to distract apart the first and second spinous processes. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An implant adapted to be inserted between adjacent spinous processes, said implant including:
a first member and a second member; said first member connected to said second member with a hinge; said first member adapted to be positioned adjacent to a first of the adjacent spinous processes, and the second member adapted to be positioned adjacent to a second of the adjacent spinous processes; a screw mechanism having a tool-receiving cap rotatively engaged on a threaded shaft and moveable therealong;
said tool receiving cap adapted to engage a driver tool;said screw mechanism positioned between the first member and the second member; and wherein when the screw mechanism is operated, the first member is urged away from the second member in order to distract apart the first and second spinous processes.
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23. An implant adapted to be inserted between adjacent spinous processes, comprising:
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a shaft extending along a longitudinal axis from a proximal end portion to a distal end portion; a wing disposed proximate said proximal end portion and generally transverse to said axis; a distraction guide disposed proximate said distal end portion and tapering away from said proximal end portion in a direction generally parallel to said axis; a spacer disposed between said wing and said distraction guide and comprising; a first member including a first longitudinal bore; a second member distinct from said first member and pivotally connected thereto by a hinge mechanism; said second member including a second longitudinal bore disposed in general alignment with said first longitudinal bore; a screw expansion mechanism positioned between the first and second members;
saidscrew expansion mechanism operative to urge said first member to pivot away from said second member; wherein said shaft extends through said first and second longitudinal bores so as to couple said spacer to said shaft for rotation thereabout; wherein said first and second members are adapted to engage respective ones of the adjacent spinous processes, with said shaft extending through a sagittal plane defined by said adjacent spinous processes, so as to distract apart the adjacent spinous processes.
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Specification