Expandable interspinous process spacer implant
First Claim
1. A method of implanting an expandable spacer implant into a vertebral space defined between a superior vertebral body and an inferior vertebral body that are spaced from one another along a first direction, the method comprising:
- inserting the implant into the vertebral space in a collapsed configuration such that (i) an outer surface of a first housing of the implant engages one of the superior and inferior vertebral bodies, (ii) an outer surface of a second housing of the implant engages another of the superior and inferior vertebral bodies, (iii) inner surfaces of the first and second housings face one another and are spaced from the outer surfaces of the first and second housings along the first direction, (iv) the first and second housings extend from a proximal-most end of the implant to a distal-most end of the implant along a second direction, perpendicular to the first direction; and
(v) a first pair of internal surfaces of the second housing are spaced from one another along the second direction and a second pair of internal surfaces of the second housing are spaced from one another along a third direction, perpendicular to the first and second directions, so as to at least partially define a void that extends into the inner surface of the second housing; and
expanding the implant by rotating a distracting member about an axis of rotation that extends along the second direction so as to move the distracting member within the void from a first position, wherein a first pair of opposed surfaces of the distracting member that define a first distance therebetween engage the first and second housings, to a second position, wherein a second pair of opposed surfaces of the distracting member that are angularly offset with respect to the first pair of opposed surfaces of the distracting member and define a second distance therebetween, greater than the first distance, engage the first and second housings so as to cause the first and second housings to move away from one another along the first direction, wherein the expanding step comprises causing a stabilizer to protrude beyond the outer surface of at least one of the first and second housings when the first and second housings are moved away from one another.
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Accused Products
Abstract
An expandable interspinous spacer implant that is configured to be inserted into an interspinous space that is defined between a spinous process of a superior vertebral body and a spinous process of an inferior vertebral body is provided. The implant may include a superior housing, an inferior housing, and a distracting member. The superior housing may have an outer surface that is configured to engage the spinous process of the superior vertebral body and the inferior housing may have an outer surface that is configured to engage the spinous process of the inferior vertebral body. The distracting member may be disposed between the superior and inferior housings, such that activation of the distracting member distracts the superior and inferior housings apart from each other.
57 Citations
17 Claims
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1. A method of implanting an expandable spacer implant into a vertebral space defined between a superior vertebral body and an inferior vertebral body that are spaced from one another along a first direction, the method comprising:
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inserting the implant into the vertebral space in a collapsed configuration such that (i) an outer surface of a first housing of the implant engages one of the superior and inferior vertebral bodies, (ii) an outer surface of a second housing of the implant engages another of the superior and inferior vertebral bodies, (iii) inner surfaces of the first and second housings face one another and are spaced from the outer surfaces of the first and second housings along the first direction, (iv) the first and second housings extend from a proximal-most end of the implant to a distal-most end of the implant along a second direction, perpendicular to the first direction; and
(v) a first pair of internal surfaces of the second housing are spaced from one another along the second direction and a second pair of internal surfaces of the second housing are spaced from one another along a third direction, perpendicular to the first and second directions, so as to at least partially define a void that extends into the inner surface of the second housing; andexpanding the implant by rotating a distracting member about an axis of rotation that extends along the second direction so as to move the distracting member within the void from a first position, wherein a first pair of opposed surfaces of the distracting member that define a first distance therebetween engage the first and second housings, to a second position, wherein a second pair of opposed surfaces of the distracting member that are angularly offset with respect to the first pair of opposed surfaces of the distracting member and define a second distance therebetween, greater than the first distance, engage the first and second housings so as to cause the first and second housings to move away from one another along the first direction, wherein the expanding step comprises causing a stabilizer to protrude beyond the outer surface of at least one of the first and second housings when the first and second housings are moved away from one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of implanting an expandable spacer implant into a vertebral space defined between a superior vertebral body and an inferior vertebral body that are spaced from one another along a first direction, the method comprising:
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inserting the implant into the vertebral space in a collapsed configuration such that (i) an outer surface of a first housing of the implant engages one of the superior and inferior vertebral bodies, (ii) an outer surface of a second housing of the implant engages another of the superior and inferior vertebral bodies, and (iii) inner surfaces of the first and second housings face one another and are spaced from the outer surfaces of the first and second housings along the first direction; and expanding the implant such that (i) the first and second housings move away from one another in the first direction, (ii) a first wing member that is rotatably coupled to a first side of the first housing translates along a first slot in the second housing in a second direction, perpendicular to the first direction, and (iii) a second wing member that is rotatably coupled to a second side of the first housing, spaced from the first side along a third direction that is perpendicular to the first and second directions, translates along a second slot in the second housing in the second direction. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification