Interspinous spacer
First Claim
1. An implant for placement between adjacent spinous processes in a spinal motion segment, the implant comprising:
- a body defining a longitudinal axis;
a first arm rotatably connected to the body and including a pair of first extensions configured to receive a first spinous process between the first extensions to laterally stabilize the body with respect to the first spinous process when in a deployed configuration;
and a second arm rotatably connected to the body and including a pair of second extensions configured to receive a second spinous process between the second extensions to laterally stabilize the body with respect to the second spinous process when in a deployed configuration; and
wherein the first and second arms in a undeployed configuration are positioned for placement between adjacent spinous processes in which at least one of the adjacent spinous processes has a projection in a coronal plane that is angled with respect to a sagittal plane of the implant, wherein the implant operates to drive each of the first and second arms along a respective are of at least 90 degrees to rotate from the undeployed configuration to a deployed configuration such that the first and second extensions move away from the longitudinal axis and each other,wherein the first arm is pivotally coupled to the body such that the first extensions rotate together relative to the body to allow positioning of both of the first extensions on either side of the sagittal plane of the implant and positioning of the first spinous process between the first extensions when in the deployed configuration.
1 Assignment
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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 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 receiving portion configured for seating a spinous process of a scoliotic spine or a spine with misaligned spinous processes. Each arm has a proximal caming surface and is capable of rotation with respect to the body. An actuator assembly is disposed inside the longitudinal 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 superior and inferior arms of the spacer.
614 Citations
15 Claims
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1. An implant for placement between adjacent spinous processes in a spinal motion segment, the implant comprising:
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a body defining a longitudinal axis; a first arm rotatably connected to the body and including a pair of first extensions configured to receive a first spinous process between the first extensions to laterally stabilize the body with respect to the first spinous process when in a deployed configuration; and a second arm rotatably connected to the body and including a pair of second extensions configured to receive a second spinous process between the second extensions to laterally stabilize the body with respect to the second spinous process when in a deployed configuration; and wherein the first and second arms in a undeployed configuration are positioned for placement between adjacent spinous processes in which at least one of the adjacent spinous processes has a projection in a coronal plane that is angled with respect to a sagittal plane of the implant, wherein the implant operates to drive each of the first and second arms along a respective are of at least 90 degrees to rotate from the undeployed configuration to a deployed configuration such that the first and second extensions move away from the longitudinal axis and each other, wherein the first arm is pivotally coupled to the body such that the first extensions rotate together relative to the body to allow positioning of both of the first extensions on either side of the sagittal plane of the implant and positioning of the first spinous process between the first extensions when in the deployed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implant for placement between adjacent spinous processes in a spinal motion segment comprising:
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a body defining a longitudinal axis; a first arm connected to the body, the first arm having a first pair of extensions defining a spinous process receiving portion for seating a superior spinous process therein; and a second arm connected to the body, the second arm having a second pair of extensions defining a spinous process receiving portion for seating an inferior spinous process therein; wherein at least one of the first arm or second arm is pivotally coupled to the body to allow the at least one of the first arm or second arm to move toward either side of a sagittal plane of the body, and a distance between the first pair of extensions is greater than a distance between the second pair of extensions, wherein the implant is operable to move the first and second arms from an undeployed configuration to a deployed configuration to move the first pair of extensions and the second pair of extensions outwardly away from the longitudinal axis while at least one of first or second pair of extensions is positioned to one side of the sagittal plane. - View Dependent Claims (11, 12, 13, 14)
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15. An implant for placement between adjacent spinous processes of a patient, the implant comprising:
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a body defining a longitudinal axis and a sagittal plane; a first U-shaped arm pivotally coupled to the body and including a pair of first extensions defining a first spinous process receiving portion for seating a first spinous process of the patient, the first U-shaped arm is configured to pivot relative to the body to a first position with both of the first extensions on a first side of the sagittal plane and to pivot relative to the body to a second position with both of the first extensions on a second side of the sagittal plane opposite the first side and the implant is configured, when the first U-shaped arm is pivoted to the first position or the second position, for locking the first U-shaped arm into the first position or the second position using a driving tool; and a second U-shaped arm connected to the body and including a second pair of extensions defining a spinous process receiving portion for seating a second spinous process of the patient, the second U-shaped arm is configured to pivot relative to the body to a third position with both of the second extensions on a first side of the sagittal plane and to pivot relative to the body to a fourth position with both of the second extensions on a second side of the sagittal plane opposite the first side and the implant is configured, when the second U-shaped arm is pivoted to the third position or the fourth position, for locking the second U-shaped arm into the third position or the fourth position using the driving tool, wherein the implant is operable to cause at least one of the first U-shaped arm or the second U-shaped arm to pivot from a undeployed configuration to a deployed configuration along an arc of at least 90 degrees.
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Specification