THERAPY DEVICE WITH FIXATED DISTRACTION DISTANCE

摘要

Assemblies for implantation across one or more adjacent bones to allow for control of the distance between bone anchors. Control of distance between bone anchors may be provided by one inter-anchor element pushing the pair of bone anchors apart and a second inter-anchor element pulling the pair of bone anchors together. Control of distance between bone anchors may be provided through use of dissimilar thread pitch. Compression of the space between bone anchors through controlled movement of a pair of anchored bone anchors towards one another.

主权项

1. A method for setting a distance between a pair of bone anchors consisting of a proximal bone anchor inserted into a proximal bone and a distal bone anchor inserted into a distal bone, the method comprising:
rotating a first inter-anchor element threadedly engaged with the proximal bone anchor to set a minimum distance between the pair of bone anchors; and rotating a second inter-anchor element threadedly engaged with the distal bone anchor to set a maximum distance between the pair of bone anchors with the maximum distance equal to the previously set minimum distance.