Interspinous spacer
First Claim
1. An implantable spacer for placement between adjacent spinous processes comprising:
- a body defining a longitudinal axis;
a first arm and a second arm both connected to the body and capable of movement with respect to the body;
each arm being configured to receive a spinous process and having a proximal bearing surface;
an actuator assembly connected to the body;
the actuator assembly comprising;
an actuator having at least one bearing surface;
a shaft connected to the actuator and configured for linear movement with respect to the body; and
a spindle;
the actuator assembly is configured to move relative to the body such that rotation of the spindle relative to the shaft causes linear movement of the actuator with respect to the body such that the at least one bearing surface of the actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes.
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 earning 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 earning 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.
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Citations
44 Claims
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1. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body;
each arm being configured to receive a spinous process and having a proximal bearing surface;an actuator assembly connected to the body;
the actuator assembly comprising;an actuator having at least one bearing surface; a shaft connected to the actuator and configured for linear movement with respect to the body; and a spindle; the actuator assembly is configured to move relative to the body such that rotation of the spindle relative to the shaft causes linear movement of the actuator with respect to the body such that the at least one bearing surface of the actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body, each arm having a proximal bearing surface; an actuator assembly connected to the body, the actuator assembly comprising; an actuator having at least one bearing surface; a shaft connected to the actuator and configured for movement with respect to the body; and a spindle; wherein the actuator assembly is configured to move relative to the body such that rotation of the spindle moves the actuator such that the at least one bearing surface of the actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the first and second arms receive adjacent spinous processes; and a retainer configured to retain the actuator and spindle with respect to the body such that the actuator moves and the spindle rotates relative to the body. - View Dependent Claims (20, 21)
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22. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body, each arm having a proximal bearing surface; an actuator assembly connected to the body, the actuator assembly comprising; an actuator having at least one bearing surface; a shaft connected to the actuator and configured for movement with respect to the body; and a spindle including an inner threaded surface, wherein the shaft includes an outer threaded surface configured for threaded engagement with the inner threaded surface of the spindle; and wherein the actuator assembly is configured to move relative to the body such that rotation of the spindle moves the actuator such that the at least one bearing surface of the actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the first and second arms receive adjacent spinous processes.
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23. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body, each arm having a proximal bearing surface; an actuator assembly connected to the body, the actuator assembly comprising; an actuator having at least one bearing surface; a shaft connected to the actuator and configured for movement with respect to the body; and a spindle; wherein the actuator assembly is configured to move relative to the body such that rotation of the spindle moves the actuator such that the at least one bearing surface of the actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the first and second arms receive adjacent spinous processes; and a lock configured to resist rotation of the spindle.
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24. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body, each arm configured to receive a spinous process, each arm having a proximal bearing surface; an actuator assembly connected to the body, the actuator assembly comprising; an actuator having at least one bearing surface; a shaft connected to the actuator and configured for movement with respect to the body; and a spindle; wherein the actuator assembly is configured to move relative to the body such that rotation of the spindle moves the actuator such that the at least one bearing surface of actuator contacts at least one of the bearing surfaces of the arms to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes; and a lock having at least one tooth and the spindle further including a plurality of teeth on the other surface configured to engage the at least one tooth on the lock.
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25. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm and a second arm both connected to the body and capable of movement with respect to the body;
each arm configured to receive a spinous process;
each arm having a proximal bearing surface;a spindle; an actuator connected to the body such that rotation of the spindle causes the actuator to move relative to the body to deploy the first and second arms from an undeployed configuration to a deployed configuration to seat adjacent spinous processes in the first and second arms; and a lock in an unlocked position is configured to allow the spindle to rotate relative to the lock to deploy the first and second arms, and the lock in a locked position is configured to provide resistance to rotation of the spindle relative to the lock so as to keep the first and second arms in place. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A spinal implant for relieving pain implantable between a superior spinous process and an inferior spinous process comprising:
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a body connected prior to implantation to at least one arm; and an actuator assembly with an actuator and a spindle, wherein the actuator is configured to translate through the body to cause the at least one arm to move with respect to the body and into at least one configuration when the spindle rotates relative to the actuator and the body, wherein the at least one arm in the at least one configuration is adapted to laterally stabilize the body with respect to an adjacent spinous process. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification