Medical implants and methods
First Claim
1. A spinal implant, comprising:
- a spacer configured to engage a first spinous process and a second spinous process;
the spacer having a proximal surface and a distal surface opposite the proximal surface;
a proximal retention member disposed proximally relative to the spacer and movably coupled to the spacer such that a portion of the proximal retention member is in contact with the proximal surface of the spacer;
a distal retention member having a first surface and a second surface, the distal retention member disposed distally relative to the spacer and movably coupled to the spacer such that the second surface is in contact with the distal surface of the spacer;
a drive screw extending along a longitudinal axis;
an axis within a plane defined by the first surface of the distal retention member being non-parallel to and non-normal to the longitudinal axis;
an actuator segment disposed distally relative to the distal retention member;
the actuator segment movably coupled to the spacer for movement relative to the spacer along the longitudinal axis;
the actuator segment having an actuation surface slidably coupled to and substantially parallel to the first surface of the distal retention member;
wherein the distal retention member is separate and distinct from both the spacer and the actuator segment;
wherein the proximal retention member is separate and distinct from both the spacer and the actuator segment;
wherein the implant is changeable from a retracted configuration to a deployed configuration;
wherein, in the retracted configuration;
the actuator segment is spaced from the distal surface of the spacer and the distal retention member longitudinally separates the actuator segment from the spacer;
an outer surface of the proximal retention member and an outer surface of the distal retention member are disposed relatively closer to the longitudinal axis;
the drive screw extends into the actuator segment a first distance;
wherein, in the deployed configuration;
the actuator segment abuts the distal surface of the spacer on a first side of the longitudinal axis and the distal retention member is disposed between the actuator segment and the distal surface of the spacer on a second side of the longitudinal axis;
the outer surface of the proximal retention member and the outer surface of the distal retention member are disposed relatively farther from the longitudinal axis;
the drive screw extends into the actuator segment a second distance larger than the first distance.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus includes a spacer, a proximal retention member, a distal retention member, and an actuator. The spacer is configured to engage adjacent spinous processes. The proximal retention member is coupled to the spacer such that a portion of the proximal retention member is in contact with a proximal surface of the spacer. An axis within a plane defined by a first surface of the distal retention member is non-parallel to and non-normal to a longitudinal axis of the spacer. The distal retention member is movably coupled to the spacer such that a second surface of the distal retention member contacts a distal surface of the spacer. The actuator is movably coupled to the spacer and is configured to move relative to the spacer along the longitudinal axis. An actuation surface of the actuator is slidably coupled to and substantially parallel to the first surface of the distal retention member.
488 Citations
9 Claims
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1. A spinal implant, comprising:
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a spacer configured to engage a first spinous process and a second spinous process;
the spacer having a proximal surface and a distal surface opposite the proximal surface;a proximal retention member disposed proximally relative to the spacer and movably coupled to the spacer such that a portion of the proximal retention member is in contact with the proximal surface of the spacer; a distal retention member having a first surface and a second surface, the distal retention member disposed distally relative to the spacer and movably coupled to the spacer such that the second surface is in contact with the distal surface of the spacer; a drive screw extending along a longitudinal axis; an axis within a plane defined by the first surface of the distal retention member being non-parallel to and non-normal to the longitudinal axis; an actuator segment disposed distally relative to the distal retention member; the actuator segment movably coupled to the spacer for movement relative to the spacer along the longitudinal axis; the actuator segment having an actuation surface slidably coupled to and substantially parallel to the first surface of the distal retention member; wherein the distal retention member is separate and distinct from both the spacer and the actuator segment; wherein the proximal retention member is separate and distinct from both the spacer and the actuator segment; wherein the implant is changeable from a retracted configuration to a deployed configuration; wherein, in the retracted configuration; the actuator segment is spaced from the distal surface of the spacer and the distal retention member longitudinally separates the actuator segment from the spacer; an outer surface of the proximal retention member and an outer surface of the distal retention member are disposed relatively closer to the longitudinal axis; the drive screw extends into the actuator segment a first distance; wherein, in the deployed configuration; the actuator segment abuts the distal surface of the spacer on a first side of the longitudinal axis and the distal retention member is disposed between the actuator segment and the distal surface of the spacer on a second side of the longitudinal axis; the outer surface of the proximal retention member and the outer surface of the distal retention member are disposed relatively farther from the longitudinal axis; the drive screw extends into the actuator segment a second distance larger than the first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification