Intramedullary fixation assembly and method of use

摘要

A method for applying compression to a joint includes providing an intramedullary fixation assembly having a proximal screw member positioned at a proximal end of the intramedullary fixation assembly and a lag screw member positioned at a distal end of the intramedullary fixation assembly. Medullary canals are drilled in a first and second bone and the medullary canals are reamed. The proximal screw member is inserted into the first bone and a drill is used create a dorsal hole in the first bone. The lag screw member is slideably coupled to the dorsal hole and to the proximal screw member and into the second medullary canal. A torque is applied to the lag screw member to apply compression to the joint.

主权项

1. An intramedullary fixation assembly for bone fusion, comprising:
a first screw member comprising a first shaft extending from a first terminal end to a second terminal end, a first aperture at the first terminal end, a first threaded portion at the second terminal end for advancing said first screw member into a first bone, a longitudinal axis extending through the first aperture and the second terminal end, and a bore extending through the first aperture and a second aperture in a side of the first screw member, wherein the longitudinal axis and the bore define an angle; and a second screw member comprising a second shaft extending along a second longitudinal axis, a bulbous portion at a first end of the second screw member, and a second threaded portion at a second end of the second screw member for advancing said second screw member into a second bone, wherein the second screw member couples to the first screw member by being inserted through the second aperture and through the bore and out the first aperture until the bulbous portion abuts the first aperture and the second threaded portion extends out of the first aperture to engage the second bone, wherein the first screw member and the second screw member translate compression to the first bone and the second bone thereby drawing the bones together; wherein the second screw member couples with the first screw member at the angle.