Spine treatment devices and methods
A device and method of spine distraction is provided.
1 . A spine distractor comprising:
an elongate member configured to be positioned across at least one motion segment between vertebrae of the spine wherein the elongate portion defines an oblique angle with respect to a median plane of a patient and a horizontal plane extending through said first vertebra:
a first portion coupled to the elongate member and configured to couple to a spinous process of a first vertebra of a spine;
a second portion configured to be coupled to a bony portion of a second vertebra, wherein the elongate portion is located between the first portion and the second portion; and
a distraction element located between the first portion and the second portion, wherein the distraction element is configured to exert a distracting force to the motion segment through the elongate member.
2 . The spine distractor of claim 1 wherein the distraction element comprises a spring biased in a distracting direction.
3 . The spine distractor of claim 2 wherein the distraction element comprises a coil.
4 . The spine distractor of claim 1 wherein the distraction element comprises an expandable portion.
5 . The spine distractor of claim 1 wherein the distraction element comprises a shock absorbing element.
6 . The spine distractor of claim 5 further comprising a spring in parallel with said shock absorbing element.
7 . The spine distractor of claim 1 wherein the first portion comprises an anchor portion configured to couple the first portion to the spinal process.
8 . The spine distractor of claim 7 wherein the anchor portion comprises a head portion.
9 . The spine distractor of claim 1 wherein the second portion is configured to couple to a pedicle attachment device attached to a pedicle of the second vertebra.
10 . The spine distractor of claim 9 wherein the pedicle has an adjustable length.
11 . The spine distractor of claim 9 wherein the second portion comprises a first articulating surface and the pedicle attachment device comprises a second articulating surface, and wherein one of the first articulating surface and second articulating surface is configured to articulate with respect to the other of the first articulating surface and the second articulating surface.
12 . The spine distractor of claim 1 further comprising a dynamic element configured to permit limited movement of the distractor when implanted.
13 . The spine distractor of claim 12 wherein the elongate member has a length and wherein the dynamic element is configured to permit limited movement of the elongate member along said length.
14 . A spine implant comprising:
an elongate portion configured to be positioned across a joint of a spine,
a proximal portion configured to be fixed to a first bone portion of a first vertebra, the proximal portion located on a first side with respect to the elongate portion and a distal portion configured to be coupled to a second bone portion of a second vertebra, the distal portion located on a second side with respect to the elongate portion, wherein the spine implant has a length, and wherein length is adjustable when the implant is attached to the first bone portion and the second bone portion.
15 . The spine implant of claim 14 wherein the elongate portion is adjustable in length.
16 . The spine implant of claim 14 wherein the length is remotely adjustable
17 . The spine implant of claim 14 further comprising an adjustment element configured to lengthen or shorten the implant wherein the adjustment element, when implanted, is percutaneously actuable.
18 . The spine implant of claim 14 wherein the elongate portion comprises a distraction rod configured to exert a distraction force across the at least one joint.
19 . The spine implant of claim 14 further comprising a moveable portion wherein the length changes when the moveable portion moves.
20 . The spine implant of claim 19 wherein the moveable portion comprises a spring.
21 . The spine implant of claim 19 further comprising a fixing element configured to fix the length of the implant after the moveable portion moves to change the length.