Surgical measurement and resection framework
First Claim
1. A system for conducting surgery on a spine of a patient, the system comprising:
- a frame comprising;
a first anchoring feature configured to be coupled to a first bone portion of the patient;
a second anchoring feature configured to be coupled to a second bone portion of the patient, wherein the first and second bone portions are spaced apart from each other;
a first registration feature shaped to guide at least one surgical instrument; and
a bridging structure configured to couple the first and second anchoring features and the first registration feature together such that the second anchoring feature is positionable at any of a variety of positions with respect to the first anchoring feature, wherein the first and second anchoring features are configured to be coupled to pedicles of the spine;
wherein the bridging structure is configured to couple the first and second anchoring features and the first registration feature together such that the second anchoring feature is movable along three dimensions with respect to the first anchoring feature;
wherein the bridging structure comprises two arms, each of which has a first end and a second end, wherein the first ends are coupled to each other via three sliding joints that provide relative motion between the first ends along three orthogonal linear axes, and the second ends are coupled to the first and second anchoring features;
wherein the bridging structure further comprises a locking mechanism that is movable into a locked position in which the locking mechanism substantially prevents relative motion between the first ends along all three orthogonal linear axes in response to user actuation of a single element;
wherein the locking mechanism comprises a deformable component that cooperates in at least two of the sliding joints, wherein compression of a portion of the deformable component in the first of the two sliding joints causes deformation of a portion of the deformable component in the second of the two sliding joints which frictionally locks the second sliding joint.
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Accused Products
Abstract
A frame is attachable to first and second bone portions of a patient to facilitate measurement and resection of one or more bony landmarks. The frame has two anchoring features, each of which has a semispherical surface that permits rotational adjustment of the frame against the bone portions until the frame is secured. A bridging structure couples the anchoring features together such that the anchoring features are lockably movable with respect to each other. The bridging structure may have three linear sliders that provide the relative motion. A locking mechanism exerts pressure on all three sliders to lock them in place. An external anchoring feature enables attachment of the frame to a stationary reference to stabilize the frame. The frame also has registration features that permit attachment of measurement or resection tools to the frame. The frame is particularly useful for measuring and resecting spinal facets for facet replacement.
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Citations
34 Claims
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1. A system for conducting surgery on a spine of a patient, the system comprising:
a frame comprising; a first anchoring feature configured to be coupled to a first bone portion of the patient; a second anchoring feature configured to be coupled to a second bone portion of the patient, wherein the first and second bone portions are spaced apart from each other; a first registration feature shaped to guide at least one surgical instrument; and a bridging structure configured to couple the first and second anchoring features and the first registration feature together such that the second anchoring feature is positionable at any of a variety of positions with respect to the first anchoring feature, wherein the first and second anchoring features are configured to be coupled to pedicles of the spine; wherein the bridging structure is configured to couple the first and second anchoring features and the first registration feature together such that the second anchoring feature is movable along three dimensions with respect to the first anchoring feature; wherein the bridging structure comprises two arms, each of which has a first end and a second end, wherein the first ends are coupled to each other via three sliding joints that provide relative motion between the first ends along three orthogonal linear axes, and the second ends are coupled to the first and second anchoring features; wherein the bridging structure further comprises a locking mechanism that is movable into a locked position in which the locking mechanism substantially prevents relative motion between the first ends along all three orthogonal linear axes in response to user actuation of a single element; wherein the locking mechanism comprises a deformable component that cooperates in at least two of the sliding joints, wherein compression of a portion of the deformable component in the first of the two sliding joints causes deformation of a portion of the deformable component in the second of the two sliding joints which frictionally locks the second sliding joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for measuring a bony landmark on a spine of a patient, the system comprising:
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a frame comprising; an external anchoring feature; a first registration feature shaped to guide at least one measurement tool configured to measure a displacement between the first registration feature and the bony landmark of the spine; and a bridging structure configured to couple the external anchoring feature and the first registration feature together; and a stationary external support comprising; a fixed end attachable to a stationary structure; and a grip configured to be coupled to the fixed end, wherein the grip is attachable to the external anchoring feature to restrict motion of the frame during measurement; wherein the bridging structure comprises; three sliding joints that provide relative motion along three orthogonal linear axes; and a locking mechanism that is movable into a locked position in which the locking mechanism substantially prevents relative motion along all three orthogonal linear axes in response to user actuation of a single element; wherein the locking mechanism comprises a deformable component that cooperates in at least two of the sliding joints, wherein compression of a portion of the deformable component in the first of the two sliding joints causes deformation of a portion of the deformable component in the second of the two sliding joints which frictionally locks the second sliding joint. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for conducting surgery on a spine of a patient, the system comprising:
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a left facet joint replacement prosthesis shaped to replace a left natural facet of the spine; a right facet joint replacement prosthesis shaped to replace a right natural facet of the spine; and a frame comprising; a first anchoring feature configured to be coupled to a first bone portion of the patient; a second anchoring feature configured to be coupled to a second bone portion of the patient, wherein the first and second bone portions are spaced apart from each other; a first registration feature shaped to guide at least one surgical instrument; and a bridging structure configured to couple the first and second anchoring features and the first registration feature together such that the second anchoring feature is positionable at any of a variety of positions with respect to the first anchoring feature, wherein the first and second anchoring features are configured to be coupled to pedicles of the spine to facilitate proper positioning of the left and right facet joint replacement prostheses; wherein the bridging structure comprises; three sliding joints that provide relative motion along three orthogonal linear axes; and a locking mechanism that is movable into a locked position in which the locking mechanism substantially prevents relative motion along all three orthogonal linear axes in response to user actuation of a single element; wherein the locking mechanism comprises a deformable component that cooperates in at least two of the sliding joints, wherein compression of a portion of the deformable component in the first of the two sliding joints causes deformation of a portion of the deformable component in the second of the two sliding joints which frictionally locks the second sliding joint. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification