APPARATUS AND METHODS FOR IMMOBILIZATION AND FUSION OF A SYNOVIAL JOINT

摘要

Methods and apparatus for immobilizing a synovial joint, such as a sacroiliac (SI) joint are disclosed. In one form, a multipiece fixation device, such as a dowel, includes multiple expandable fasteners that are configured to fix adjacent bones of a synovial joint with respect to one another. The expandable fasteners include expansion portions that are expanded radially via insertion of another expandable fastener or an expansion device to fix the expandable fasteners to the bone. The fixation device may be configured to provide for compression or distraction of the bones of the synovial joint while at the same time stabilizing the joint.

主权项

1. A multipiece fastener for stabilizing a synovial joint, comprising:
an expandable outer sleeve member having an outer bone engaging surface and an interior surface defining a first longitudinally extending passage; a first radially expandable portion of the outer sleeve member for engaging with a first bone or tissue of the synovial joint; an inner sleeve member having an outer surface configured to fit within the first longitudinally extending passage of the outer sleeve member and to engage with the first radially expandable portion of the outer sleeve member to urge the first radially expandable portion radially outward, and an interior surface defining a second longitudinally extending passage; a second radially expandable portion of the inner sleeve member for engaging with a second bone or tissue of the synovial joint; an expansion member having a body which is sized and configured to fit within the second longitudinally extending passage of the inner sleeve member and an outer surface portion configured to engage with the second radially expandable portion of the inner sleeve member to urge the second expandable portion radially outward.