Intraosseous intramedullary fixation assembly and method of use

摘要

An intramedullary assembly for intraosseous bone fusion includes a lag screw member and a tapered screw member. The lag screw member includes a first elongated body, where the first elongated body includes a first threaded portion at a first end and a bulbous portion at a second end. The tapered screw member is coupled to the lag screw member, and the tapered screw member includes a second elongated body, where the second elongated body includes a second threaded portion at a third end, and an opening at a fourth end.

主权项

1. A method for fusing bones, comprising:
providing a first screw member extending from a first end to a second terminal end and comprising a first threaded portion at the first end, a first aperture at the second terminal end, and a bore extending from the first aperture to a second aperture on an exterior surface of the first screw member; providing a second screw member extending from a first end to a second end and comprising a second threaded portion at the first end and a bulbous portion at the second end; forming a first bore hole in a first bone or bone fragment; inserting the first screw member into the first bore hole; forming a second bore hole in the second bone or bone fragment; inserting the second screw member into the first aperture, through the bore, and out of the second aperture of the first screw member until an exterior surface of the bulbous portion of the second screw member abuts the interior surface of the bore at the first aperture of the first screw member wherein the bore of the first screw member includes a taper for providing an interference fit with the bulbous portion of the second screw member, and the second threaded portion extends out of the second aperture to engage the second bore hole in the second bone or bone fragment; and applying torque to the second screw member to lock the second screw member to the first screw member, thereby compressing the first bone or bone fragment to the second bone or bone fragment.