Interspinous spacer
First Claim
1. An implantable spacer, comprising:
- a body;
a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra;
a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and
an actuator assembly includingan actuator element, anda rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration, and wherein the rotatable element is a spindle with an internally threaded surface.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable spacer for placement between adjacent spinous processes in a spinal motion segment is provided. The spacer includes a body defining a longitudinal axis and passageway. A first arm and a second arm are connected to the body. Each arm has a pair of extensions and a saddle defining a U-shaped configuration for seating a spinous process therein. Each arm has a proximal caming surface and is capable of rotation with respect to the body. An actuator assembly is disposed inside the passageway and connected to the body. When advanced, a threaded shaft of the actuator assembly contacts the caming surfaces of arms to rotate them from an undeployed configuration to a deployed configuration. In the deployed configuration, the distracted adjacent spinous processes are seated in the U-shaped portion of the arms.
604 Citations
14 Claims
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1. An implantable spacer, comprising:
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a body; a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra; a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration, and wherein the rotatable element is a spindle with an internally threaded surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An implantable spacer, comprising:
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a body; a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra; a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, and wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration, and wherein the actuator element includes at least one bearing surface, and a shaft positioned in a passageway in the body and extending through an opening in the rotatable element, and wherein the at least one bearing surface contacts and moves the first and second arms toward the deployed configuration when the rotatable element rotates relative to the shaft to translate the shaft along the passageway.
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8. An implantable spacer, comprising:
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a body; a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra; a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration, wherein the first and second arms each have U-shaped portions.
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9. An implantable spacer, comprising:
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a body; a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra; a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration, and wherein the rotatable element is configured to cause the actuator element to move from a first position to a second position, wherein the actuator element in the first position is spaced apart from both of the first and second arms, and wherein the actuator element in the second position contacts both the first and second arms.
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10. An implantable spacer, comprising:
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a body; a first arm rotatably coupled to the body and configured to receive a first protrusion of a first vertebra; a second arm rotatably coupled to the body and configured to receive a second protrusion of a second vertebra; and an actuator assembly including an actuator element movable from a first position to a second position, wherein an externally threaded portion of the actuator element protrudes from the body when the actuator element is in the first position, and wherein most of the threaded portion protruding from the body moves into the body when the actuator element moves from the first position to the second position, and a rotatable element that rotates relative to the body when driven by an insertion instrument detachably connected to the actuator assembly to translate the actuator element along the body such that the actuator element causes rotation of the first and second arms from a delivery configuration to a deployed configuration, wherein the first arm is positioned to hold the first protrusion and the second arm is positioned to hold the second protrusion when the first and second arms are in the deployed configuration.
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11. An implantable spacer, comprising:
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a body; a plurality of deployable arms; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body to move the actuator element along the body such that the actuator element moves the deployable arms to reconfigure the implantable spacer from a delivery configuration for delivery between first and second vertebrae to a deployed configuration for holding a first protrusion of the first vertebra and a second protrusion of the second vertebra when the implantable spacer is between the first and second vertebrae and the actuator assembly is driven by an insertion instrument detachably connected to the actuator assembly, wherein the actuator element includes a wedged shaped head and an externally threaded shaft that engages internal threads of the rotatable element. - View Dependent Claims (12, 13)
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14. An implantable spacer, comprising:
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a body; a plurality of deployable arms; and an actuator assembly including an actuator element, and a rotatable element that rotates relative to the body to move the actuator element along the body such that the actuator element moves the deployable arms to reconfigure the implantable spacer from a delivery configuration for delivery between first and second vertebrae to a deployed configuration for holding a first protrusion of the first vertebra and a second protrusion of the second vertebra when the implantable spacer is between the first and second vertebrae and the actuator assembly is driven by an insertion instrument detachably connected to the actuator assembly wherein the actuator element includes at least one bearing surface, and a shaft positioned in a passageway in the body and protruding from the body when the implantable spacer is in the deployed configuration, and wherein the shaft translates along the passageway such that the at least one bearing surface contacts at least one of the first and second arms to move the first and second arms toward the deployed configuration when the rotatable element rotates relative to the shaft.
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Specification