Interspinous process distraction implant and method of implantation
First Claim
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1. A spinal implant comprising:
- a spacer having a longitudinal axis and first and second end portions;
said spacer further having an anterior edge and a posterior edge and elongated therebetween in a first direction generally transverse to said longitudinal axis;
a first wing disposed proximate said first end portion and disposed generally transverse to said longitudinal axis;
said first wing elongated from a posterior edge to an anterior edge thereof in said first direction;
a distraction guide disposed more proximate said second end portion than said first end portion and tapering away from said first wing;
a second wing disposed proximate said second end portion and said distraction guide, said second wing disposed generally transverse to said longitudinal axis and removably mounted to at least one of said spacer and said distraction guide;
said second wing elongated from a posterior edge to an anterior edge thereof in said first direction;
wherein the anterior and posterior edges of said spacer are generally rounded, said spacer further having generally linear surfaces disposed between said anterior and posterior edges disposed so as to diverge from each other toward said posterior edge so that said spacer creates a wedge narrowing in said first direction;
wherein the spacer is rotatable about said longitudinal axis so as to be variably positioned rotationally relative to said first wing while said spacer is coupled to said first wing.
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Abstract
An implant for positioning between the spinous processes, such as the spinous processes of cervical vertebrae, include first and second wings foe lateral positioning and a spacer located between the adjacent spinous processes. The implant can be positioned using minimally invasive procedures without modifying the bone or severing ligaments. The implant is shaped in accordance with the anatomy of the spine.
354 Citations
20 Claims
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1. A spinal implant comprising:
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a spacer having a longitudinal axis and first and second end portions;
said spacer further having an anterior edge and a posterior edge and elongated therebetween in a first direction generally transverse to said longitudinal axis;a first wing disposed proximate said first end portion and disposed generally transverse to said longitudinal axis;
said first wing elongated from a posterior edge to an anterior edge thereof in said first direction;a distraction guide disposed more proximate said second end portion than said first end portion and tapering away from said first wing; a second wing disposed proximate said second end portion and said distraction guide, said second wing disposed generally transverse to said longitudinal axis and removably mounted to at least one of said spacer and said distraction guide;
said second wing elongated from a posterior edge to an anterior edge thereof in said first direction;wherein the anterior and posterior edges of said spacer are generally rounded, said spacer further having generally linear surfaces disposed between said anterior and posterior edges disposed so as to diverge from each other toward said posterior edge so that said spacer creates a wedge narrowing in said first direction; wherein the spacer is rotatable about said longitudinal axis so as to be variably positioned rotationally relative to said first wing while said spacer is coupled to said first wing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for implanting an implant between spinous processes comprising the steps of:
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inserting a first portion of the implant including a spacer and a distraction end laterally between adjacent spinous processes;
said spacer having;a longitudinal axis and first and second end portions; an anterior edge and a posterior edge and elongated therebetween in a first direction generally transverse to said longitudinal axis; said first portion comprising a first wing disposed proximate said spacer first end portion and disposed generally transverse to said longitudinal axis; inserting a second portion of the implant including a second wing laterally from an opposite direction from the insertion of the first portion such that said second wing is disposed proximate said second end portion and said distraction end and generally transverse to said longitudinal axis; and fastening the second portion to the first portion; wherein, after said fastening, said first wing, said second wing, and said spacer are elongated in a posterior to anterior direction with respect to the adjacent spinous processes. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification