Interspinous spacer
First Claim
1. An implantable spacer for placement between adjacent spinous processes comprising:
- a body defining a longitudinal axis and passageway through at least a portion of the body;
a first arm and a second arm both connected to the body and capable of rotation 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; and
a threaded shaft connected to the actuator and configured for movement with respect to the body;
the actuator assembly is configured such that the actuator is disposed inside the body and configured to move relative to the body such that the at least one bearing surface contacts the caming surfaces of the arms to thereby rotate the arms from an undeployed configuration in which the arms are substantially parallel to the longitudinal axis of the body to a deployed configuration in which the arms are substantially perpendicular to the longitudinal axis of the body;
wherein, when the body is positioned between the spinous processes such that the longitudinal axis of the body extends in a posterior-anterior direction relative to the spine, the arms receive and seat the adjacent spinous processes when the first and second arms are in the deployed configuration.
2 Assignments
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.
507 Citations
41 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 and passageway through at least a portion of the body; a first arm and a second arm both connected to the body and capable of rotation 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; and a threaded shaft connected to the actuator and configured for movement with respect to the body; the actuator assembly is configured such that the actuator is disposed inside the body and configured to move relative to the body such that the at least one bearing surface contacts the caming surfaces of the arms to thereby rotate the arms from an undeployed configuration in which the arms are substantially parallel to the longitudinal axis of the body to a deployed configuration in which the arms are substantially perpendicular to the longitudinal axis of the body;
wherein, when the body is positioned between the spinous processes such that the longitudinal axis of the body extends in a posterior-anterior direction relative to the spine, the arms receive and seat the adjacent spinous processes when the first and second arms are in the deployed configuration. - 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 and passageway through at least a portion of the body; a first arm and a second arm both connected to the body and capable of rotation 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; and a threaded shaft connected to the actuator and configured for movement with respect to the body; and a retainer configured to retain the actuator inside the body, wherein the retainer includes an inner threaded surface configured for threaded engagement with the threaded shaft; wherein the actuator assembly is configured such that the actuator is disposed inside the body and configured to move relative to the body such that the at least one bearing surface contacts the caming surfaces of the arms to thereby rotate the arms from an undeployed configuration in which the arms are substantially parallel to the longitudinal axis of the body to a deployed configuration in which the arms are substantially perpendicular to the longitudinal axis of the body;
wherein the arms seat adjacent spinous processes when in the deployed configuration.
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20. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis and passageway through at least a portion of the body; a first arm and a second arm both connected to the body and capable of rotation 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; and a threaded shaft connected to the actuator and configured for movement with respect to the body; and a retainer configured to retain the actuator inside the body, wherein the retainer includes two prongs with inner threaded surfaces configured to receive the threaded shaft; wherein the actuator assembly is configured such that the actuator is disposed inside the body and configured to move relative to the body such that the at least one bearing surface contacts the caming surfaces of the arms to thereby rotate the arms from an undeployed configuration in which the arms are substantially parallel to the longitudinal axis of the body to a deployed configuration in which the arms are substantially perpendicular to the longitudinal axis of the body;
wherein the arms seat adjacent spinous processes when in the deployed configuration a retainer configured to retain the actuator inside the body. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis and passageway through at least a portion of the body; at least a first arm connected to the body and capable of movement with respect to the body and configured for receiving a spinous process; and an actuator connected to the body, disposed inside the longitudinal passageway and configured to move relative to the body to deploy the at least first arm from an undeployed configuration in which the first arm is substantially parallel to the longitudinal axis of the body to at least one deployed configuration in which the first arm is substantially perpendicular to the longitudinal axis of the body;
wherein the first arm receives a spinous process such that the longitudinal axis of the body is positioned between the adjacent spinous processes and extends in a substantially posterior-anterior direction when the first arm is in the at least one deployed configuration. - View Dependent Claims (27, 28, 29)
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30. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis and passageway through at least a portion of the body; a first arm and a second arm both connected to the body and capable of rotation with respect to the body;
each arm having a pair of extensions and a saddle defining a configuration for seating a spinous process therein;
each arm having a proximal bearing surface;an actuator connected to the body and configured to move relative to the body to deploy the arms from an undeployed configuration in which the arms are substantially parallel to the longitudinal axis of the body to a deployed configuration in which the arms are substantially perpendicular to the longitudinal axis of the body;
wherein the arms seat adjacent spinous processes such that the longitudinal axis of the body is positioned between the adjacent spinous processes and extends in a substantially posterior-anterior direction when the first and second arms are in the deployed configuration; anda retainer configured to retain the actuator inside the body while permitting the actuator relative movement with respect to the body. - View Dependent Claims (31, 32)
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33. An implantable spacer for placement between a superior spinous process and an adjacent inferior spinous process comprising:
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a body defining a longitudinal axis and passageway through at least a portion of the body; at least a first arm connected to the body and capable of movement with respect to the body;
the first arm having a configuration for seating the superior spinous process;an actuator connected to the body, disposed inside the longitudinal passageway and configured to move relative to the body to deploy the at least first arm from an undeployed configuration in which the first arm is substantially parallel to the longitudinal axis of the body to at least one deployed configuration in which the first arm is substantially perpendicular to the longitudinal axis of the body;
wherein the first arm seats the superior spinous process such that the longitudinal axis of the body is positioned between the superior spinous process and, the adjacent inferior spinous process and extends in a substantially posterior-anterior direction when the first arm is in the at least one deployed configuration. - View Dependent Claims (34, 35, 36, 37, 38)
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39. An implantable spacer for placement between adjacent spinous processes comprising:
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a body defining a longitudinal axis; a first arm pivotally connected to the body and capable of movement with respect to the body, wherein the first arm is configured to receive a first spinous process; a second arm pivotally connected to the body and capable of movement with respect to the body, wherein the second arm is configured to receive a second spinous process; and an actuator coupled to the body and configured to move relative to the body to deploy the first arm and the second arm from an undeployed configuration to at least one deployed configuration in which the first arm receives the first spinous process and the second arm receives the second spinous process such that the longitudinal axis of the body is positioned between the first and second spinous processes and extends in a substantially posterior-anterior direction. - View Dependent Claims (40, 41)
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Specification