Intervertebral distraction device
First Claim
1. An intervertebral distraction instrument configured to separate a first vertebra and a second vertebra, the intervertebral distraction instrument comprising:
- a) a first vertebra engaging member, the first vertebra engaging member including a vertebra anchor member configured to prevent lateral movement of the distraction instrument and allow anterior-posterior movement of the distraction instrument during engagement with the first vertebra; and
b) a second vertebra engaging member configured to move relative to the first vertebra engaging member.
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Accused Products
Abstract
An intervertebral distraction instrument comprises a first vertebra engaging member and a second vertebra engaging member. The first vertebra engaging member includes a vertebra anchor member configured to prevent lateral movement of the distraction instrument while allowing anterior-posterior movement of the distraction instrument during engagement with the first vertebrae. A similar anchor member may also be provided on the second vertebra engaging member. The anchor member of the distraction instrument may be provided on the end portion of an elongated arm of the distraction instrument. In one embodiment, the anchor member of the distraction instrument comprises a keel that includes edge configured to cut into the vertebra. In another embodiment, the anchor member of the distraction instrument comprises a spike.
71 Citations
23 Claims
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1. An intervertebral distraction instrument configured to separate a first vertebra and a second vertebra, the intervertebral distraction instrument comprising:
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a) a first vertebra engaging member, the first vertebra engaging member including a vertebra anchor member configured to prevent lateral movement of the distraction instrument and allow anterior-posterior movement of the distraction instrument during engagement with the first vertebra; and b) a second vertebra engaging member configured to move relative to the first vertebra engaging member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An intervertebral distraction instrument configured to engage a first vertebra and a second vertebra, the intervertebral distraction instrument comprising:
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a) a first distraction arm with a first vertebra engaging surface provided on the end of the first distraction arm; b) a second distraction arm with a second vertebra engaging surface provided on the end of the second distraction arm, the second distraction arm configured to move relative to the first distraction arm; and c) a vertebra anchor member provided on the first vertebra engaging surface, the vertebra anchor member configured to prevent lateral movement of the distraction instrument and allow anterior-posterior movement of the distraction instrument during engagement with the first vertebrae. - View Dependent Claims (18, 19, 20)
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21. An intervertebral distraction instrument configured to engage a first vertebra and a second vertebra, the intervertebral distraction instrument comprising:
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a) a first vertebra engaging member, the first vertebra engaging member including means for preventing lateral movement of the distraction instrument while allowing anterior-posterior movement of the distraction instrument during engagement of the first vertebra engaging member with the first vertebrae; and b) a second vertebra engaging member configured to move relative to the first vertebra engaging member.
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22. A method of inserting an intervertebral prosthesis, the method comprising the steps of:
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a) providing an intervertebral distraction instrument comprising a vertebra anchor configured to prevent lateral movement of the distraction instrument during engagement with the first vertebra; b) engaging the vertebra anchor with the vertebra such that it cuts into the vertebra; and c) inserting the prosthesis in an intervertebral space during engagement of the vertebra anchor with the vertebra. - View Dependent Claims (23)
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Specification