Minimally invasive expanding spacer and method
First Claim
1. A spacer to position vertebral members comprising:
- a first body comprising a first angled surface that increases distally along a length of the spacer;
a second body adjacent to the first body and comprising a second angled surface that increases proximally along a length of the spacer;
the first body being movable relative to the second body and positionable between a first orientation having a first height, and a second orientation having a second height with the first angled surface and the second angled surface being in contact, the second height being greater than the first height.
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Accused Products
Abstract
A spacer and method of using the spacer for positioning between and spacing vertebral members. The spacer is positionable between a first position having a reduced size to be minimally invasive when inserted into the patient between the vertebral members. The spacer is expandable up to a second position to contact the vertebral members. In one embodiment, a delivery device is attached to position the spacer within the patient. The delivery device may remain connected to the spacer, or may be removable with the spacer remaining within the patient as the delivery device is removed. In one embodiment, the spacer comprises a first member and a second member each positioned about a middle member. Middle member moves relative to the first and second members with angled surfaces contacting to deploy the spacer between the closed and open orientations.
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Citations
42 Claims
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1. A spacer to position vertebral members comprising:
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a first body comprising a first angled surface that increases distally along a length of the spacer;
a second body adjacent to the first body and comprising a second angled surface that increases proximally along a length of the spacer;
the first body being movable relative to the second body and positionable between a first orientation having a first height, and a second orientation having a second height with the first angled surface and the second angled surface being in contact, the second height being greater than the first height. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A spacer for positioning between vertebral members comprising:
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a middle member having a wedge with a first surface and a second surface forming a vertex that is positioned proximally of a base;
a first member positioned on a first side of the middle member and comprising a first contact surface and a first angled surface; and
a second member positioned on a second side of the middle member and comprising a second contact surface and a second angled surface;
the device being positionable between a first orientation with the first angled surface positioned from the first surface and the second angled surface positioned from the second surface, and a second orientation with the first angled surface contacting the first surface and the second angled surface contacting the second surface with the first contact surface and the second contact surface positioned apart a distance greater than in the first orientation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A spacer for positioning between vertebral members comprising:
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a middle member having a first wedge and a second wedge each angled in a first direction and positioned a predetermined distance apart;
a first member comprising a first contact surface, and a first angled surface and a second angled surface positioned the predetermined distance apart, the first angled surface and the second angled surface angled in a second direction different from the first direction; and
a second member comprising a second contact surface and a third angled surface and a fourth angled surface positioned the predetermined distance apart, the second member being positioned adjacent to the middle member and opposite from the first member, the third angled surface and the fourth angled surface angled in the second direction. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A spacer for positioning between vertebral members comprising:
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a first body comprising a first angled surface and a platform surface positioned at a first angled surface end; and
a second body comprising a second angled surface and a support surface positioned at a second angled surface end, the first angled surface positioned in a different direction from the second angled surface;
the first body being movable relative to the second body between a first orientation with the platform surface apart from the support surface and a second orientation with the platform surface contacting the support surface, a height of the spacer being greater in the second orientation than in the first orientation. - View Dependent Claims (26)
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27. A spacer for positioning between vertebral members comprising:
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a wedge having a first platform surface and a second platform surface;
a first member comprising a first angled surface having a first support surface positioned at an end of the first angled surface;
a second member comprising a second angled surface having a second support surface positioned at an end of the second angled surface;
the spacer being positionable between a first orientation with the first support surface apart from the first platform surface and the second support surface apart from the second platform surface, and a second orientation with the first support surface contacting the first platform surface and the second support surface contacting the second platform surface, a spacer height being greater in the second orientation than in the first orientation;
the first angled surface and second angled surface being in the same direction.
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28. A spacer for positioning vertebral members comprising:
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a middle member having an angled wedge with a first step and a second step;
a first member having a first angled surface and a first support surface;
a second member having a second angled surface and a second support surface;
a chassis positioned around the middle member and having a first aperture and a second aperture spaced a distance apart;
a locking member positioned within the middle member;
the middle member being movable relative to the first and second members between a first position with the first support surface and the second support surface positioned on the first step and the locking member positioned within the first aperture, and a second position with the first support surface and the second support surface positioned on the second step and the locking member positioned within the second aperture, the spacer having a height that is greater in the second position than in the first position. - View Dependent Claims (29, 30)
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31. A method of spacing a first vertebral member from a second vertebral member comprising the steps of:
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inserting a spacer between the vertebral members;
increasing a height of the spacer by sliding an angled surface of a first member against an angled surface of a second member and separating a first contact surface from a second contact surface; and
contacting the first vertebral member with the first contact surface and contacting the second vertebral member with the second contact surface. - View Dependent Claims (32, 33)
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34. A method of spacing a first vertebral member from a second vertebral member comprising the steps of:
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moving a first member away from a centerline of a spacer by sliding a first angled surface of the first member against a first inclined surface of a middle member;
moving a second member away from a centerline of the spacer by sliding a second angled surface of the second member against a second inclined surface of the middle member; and
contacting the first member with the first vertebral member and contacting the second member with the second vertebral member. - View Dependent Claims (35, 36, 37, 38)
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39. A method of spacing vertebral members comprising the steps of:
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placing a spacer in a first orientation between the vertebral members, the spacer having a first height;
moving a middle member in a distal direction relative to a first member and a second member; and
increasing the spacer to a second height greater than the first height by sliding an angled wedge of the middle member against a first angled edge of a first member and a second angled edge of a second member. - View Dependent Claims (40, 41, 42)
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Specification