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 being configured to receive a spinous process and rotatable about an axis of rotation relative 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; 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 of the actuator contacts the bearing surfaces of the arms and moves directly between the axes of rotation 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.
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.
534 Citations
40 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 being configured to receive a spinous process and rotatable about an axis of rotation relative 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; 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 of the actuator contacts the bearing surfaces of the arms and moves directly between the axes of rotation 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. - 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 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, and a threaded shaft connected to the actuator and configured for movement with respect to the body, 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 of the actuator contacts the bearing 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; 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. - View Dependent Claims (20, 21, 22, 23, 24)
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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 and passageway through at least a portion of the body; at least a first arm connected to the body and including a proximal bearing surface and a pair of elongated members, wherein the at least the first arm is capable of rotation about a first axis of rotation with respect to the body such that the first axis of rotation is between the elongated members and the proximal bearing surface, and wherein the at least the first arm is 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 contact the proximal bearing surface 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 when in the at least one deployed configuration. - View Dependent Claims (26, 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, each arm having a pair of extensions and a saddle and being capable of rotation with respect to the body such that the extensions and the saddle rotate relative to the body to seat a spinous process between the extensions, 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 when 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, 33)
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34. An implantable spacer for placement between a superior spinous process and an adjacent inferior spinous process of a subject, the implantable spacer 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 configured to seat 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 is configured to seat the superior spinous process when the first arm is in the at least one deployed configuration and the longitudinal axis of the body is substantially parallel to a sagittal plane of the subject. - View Dependent Claims (35, 36, 37, 38, 39)
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40. An implantable spacer for placement between adjacent spinous processes, the implantable spacer comprising:
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a body defining a longitudinal axis and a passageway through at least a portion of the body; a first arm and a second arm, each of the first and second arms having rigid extensions that are spaced apart to receive a spinous process; an actuator configured to move along the passageway to deploy the arms from an undeployed configuration in which the rigid extensions are substantially parallel to the longitudinal axis of the body and the extensions extend away from the body to a deployed configuration in which the rigid extensions extend alongside the spinous processes; and a retainer rotatable relative to the body and the actuator such that rotation of the retainer causes translation of the actuator along the passageway to move the arms from the undeployed configuration to the deployed configuration.
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Specification