Spine stabilization device and method
First Claim
1. A spine stabilization device comprising:
- a vertebral body prosthesis adapted to be positioned between first and second separated vertebral bodies,said prosthesis having a prosthesis first end and an opposite prosthesis second end,a first anchoring pin extendible relative to said prosthesis and out of said prosthesis first end,a second anchoring pin extendible relative to said prosthesis and out of said prosthesis second end, anda rack gear means for extending said first anchoring pin out of said prosthesis first end and driving it into said first vertebral body to secure said prosthesis to said first vertebral body, when said prosthesis is positioned between said first and second vertebral bodies, and for extending said second anchoring pin out of said prosthesis second end towards said second vertebral body.
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Abstract
A spinal stabilization device positionable between separated but neighboring vertebral bodies to stabilize a spinal column which has been rendered unstable by disease. The device includes a vertebral body prosthesis containing at least one pair of oppositely disposed anchoring pins which are advanced out of the prosthesis into the abutting vertebral bodies to secure the prosthesis to and between them. On its anterior side the prosthesis has an opening communicating with the pins inside the prosthesis. A wrench is inserted into the opening until it engages the pair of pins, and then the wrench is rotated to advance the pins into the abutting vertebral bodies. Detent pins bias the anchoring pins against the wrench and lock the anchoring pins in place when in their fully extended anchoring positions. Spacer members can be attached to the ends of the prosthesis thereby elongating it to accommodate separations between neighboring vertebral bodies of varying dimensions.
1129 Citations
49 Claims
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1. A spine stabilization device comprising:
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a vertebral body prosthesis adapted to be positioned between first and second separated vertebral bodies, said prosthesis having a prosthesis first end and an opposite prosthesis second end, a first anchoring pin extendible relative to said prosthesis and out of said prosthesis first end, a second anchoring pin extendible relative to said prosthesis and out of said prosthesis second end, and a rack gear means for extending said first anchoring pin out of said prosthesis first end and driving it into said first vertebral body to secure said prosthesis to said first vertebral body, when said prosthesis is positioned between said first and second vertebral bodies, and for extending said second anchoring pin out of said prosthesis second end towards said second vertebral body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A spine stabilization device comprising:
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a vertebral body prosthesis adapted to be positioned between first and second separated vertebral bodies, said prosthesis having a prosthesis first end and an opposite prosthesis second end, a first anchoring pin extendible relative to said prosthesis, and out of said prosthesis first end said first achoring pin including a gear-toothed surface portion a second anchoring pin extendible relative to said prosthesis, and out of said prosthesis second end said second anchoring pin including a second pin gear-toothed surface portion a rotatable gear member positionable within said prosthesis and engageable with said gear toothed surface portion and with said second pin gear toothed surface portion, and a handle engageable with said rotatable gear member and when turned causing said first anchoring pin to extend further out of said prosthesis first end and into said first vertebral body to secure said prosthesis thereto and causing said second anchoring pin to extend further out of said prosthesis second end.
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41. A method for stabilizing a spine having separated but neighboring first and second vertebral bodies comprising the steps of:
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further separating apart with a distraction device said first and second vertebral bodies, thereafter, positioning between said first and second vertebral bodies a vertebral body prosthesis containing a pair of oppositely disposed anchoring pins, and thereafter, advancing out of said prosthesis via a rack gear mechanism said anchoring pins so that the one of said anchoring pins penetrates a distance into said first vertebral body and secures said prosthesis thereto, and the other extends out of said prosthesis towards said second vertebral body. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
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Specification