Systems and methods for posterior dynamic stabilization of the spine
First Claim
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1. A device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the device comprising:
- a helical body including a first spinous process-receiving recess, a second spinous process-receiving recess, and at least two segments, the at least two segments physically contact each other such that a force provided by a delivery device detachably coupled to the device causes one or both of the segments to move in a direction with a component substantially perpendicular to a longitudinal axis of the device, the helical body having a cross-sectional shape that varies along at least a portion of the longitudinal axis, the helical body having an undeployed configuration with an axial dimension and a radial dimension substantially transverse to the axial dimension, and a deployed configuration having an axial dimension and a radial dimension substantially transverse to the axial dimension such that the first and second spinous process-receiving recesses move away from one another when the helical body moves from the undeployed configuration to the deployed configuration, and wherein the radial dimension of at least a portion of the helical body in the undeployed configuration is less than the radial dimension of at least a portion of the helical body in the deployed configuration.
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Abstract
Devices, systems and methods for dynamically stabilizing the spine are provided. The devices include an expandable spacer having an undeployed configuration and a deployed configuration, wherein the spacer has axial and radial dimensions for positioning between the spinous processes of adjacent vertebrae. The systems include one or more spacers and a mechanical actuation means for delivering and deploying the spacer. The methods involve the implantation of one or more spacers within the interspinous space.
589 Citations
24 Claims
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1. A device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the device comprising:
a helical body including a first spinous process-receiving recess, a second spinous process-receiving recess, and at least two segments, the at least two segments physically contact each other such that a force provided by a delivery device detachably coupled to the device causes one or both of the segments to move in a direction with a component substantially perpendicular to a longitudinal axis of the device, the helical body having a cross-sectional shape that varies along at least a portion of the longitudinal axis, the helical body having an undeployed configuration with an axial dimension and a radial dimension substantially transverse to the axial dimension, and a deployed configuration having an axial dimension and a radial dimension substantially transverse to the axial dimension such that the first and second spinous process-receiving recesses move away from one another when the helical body moves from the undeployed configuration to the deployed configuration, and wherein the radial dimension of at least a portion of the helical body in the undeployed configuration is less than the radial dimension of at least a portion of the helical body in the deployed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device for stabilizing at least one spinal motion segment comprising a first vertebra having a first spinous process and a second vertebra having a second spinous process, the device comprising:
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a helical body having a cross-sectional shape that varies along at least a portion of a longitudinal axis, wherein the helical body has an undeployed configuration with an axial dimension and a radial dimension substantially transverse to the axial dimension, and a deployed configuration having an axial dimension and a radial dimension substantially transverse to the axial dimension, wherein the radial dimension of at least a portion of the helical body in the undeployed configuration is less than the radial dimension of at least a portion of the helical body in the deployed configuration; a tip disposed adjacent to and distal to a distal end of the helical body; and a shaft disposed adjacent to and proximal of a proximal end of the helical body, wherein each turn of the helical body has a distal edge and a proximal edge, and wherein the angle formed between the distal edge of a distal turn of the helical body and the tip is substantially zero, and wherein the angle formed between the proximal edge of a proximal turn of the helical body and the shaft is substantially zero. - View Dependent Claims (19, 20)
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21. An implantable interspinous device for delivery to an interspinous space by a lateral approach, the implantable interspinous device comprising:
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a first tapered section having an axial dimension and a radial dimension that is substantially transverse to the axial dimension, the radial dimension varies along at least a portion of a longitudinal axis of the implantable interspinous device, wherein at least a portion of the first tapered section has a helical configuration; a second tapered section; at least one spinous process-receiving recess positioned between the first tapered section and the second tapered section such that the first and second tapered sections extend away from opposite sides of the interspinous space when first and second spinous processes of a subject are positioned in the at least one spinous process-receiving recess. - View Dependent Claims (22, 23, 24)
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Specification