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 defining a configuration for receiving a spinous process of a subject;
each arm having a proximal caming 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;
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 contacts at least one of the caming surfaces to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes while the body is positioned between the spinous processes such that the longitudinal axis of the body extends in a posterior-anterior direction relative to a spine of the subject.
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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.
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Citations
36 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 defining a configuration for receiving a spinous process of a subject;
each arm having a proximal caming 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; 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 contacts at least one of the caming surfaces to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes while the body is positioned between the spinous processes such that the longitudinal axis of the body extends in a posterior-anterior direction relative to a spine of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. 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 defining a configuration for receiving a spinous process;
each arm having a proximal caming 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; a retainer configured to retain the actuator and the spindle with respect to the body such that the actuator moves and the spindle rotates relative to the body, wherein the retainer includes an opening configured to allow the shaft to pass through; 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 contacts at least one of the caming surfaces to move both of the arms from an undeployed configuration to a deployed configuration in which the arms receive adjacent spinous processes.
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28. 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 configuration for receiving a spinous process;
each arm having a proximal caming surface;an actuator connected to the body and configured to move relative to the body to deploy the arms from an undeployed configuration wherein in the deployed configuration the arms seat adjacent spinous processes and the longitudinal axis of the body is positioned between the adjacent spinous processes and extends in a substantially posterior-anterior direction; and a lock configured to provide resistance to keep the arms in place. - View Dependent Claims (29, 30, 31, 32, 33)
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34. 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 including a substantially U-shaped portion configured to receive and extend on either side of a spinous process; 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 contacts and moves both of the arms from an undeployed configuration to a deployed configuration in which the substantially U-shaped portions of the arms receive and extend on either side of the adjacent spinous processes. - View Dependent Claims (35, 36)
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Specification