Percutaneous expanding hammertoe implant
AssigneeWright Medical Technology, Inc.
InventorDaniel McCormick
Life of this patent
Estimating the term…
Abstract
A method and device to correct hammertoes. The device includes a bone implant having a screw with a threaded end and an annular sleeve with a first threaded portion to accept the threaded end of the screw and an expanding feature along a portion of the sleeve. When the implant is implanted into a joint through a percutaneous incision and the screw is rotated about its longitudinal axis when mated with the first threaded portion of the sleeve, the expanding feature may be expanded to anchor the implant in the respective bone and/or compress the joint.
Claims9
A bone implant comprising:
- a screw with a threaded end;
- and
- an annular sleeve accepting the screw, the sleeve comprising:
- a first threaded portion to accept the threaded end of the screw, and an expanding feature along a portion of the sleeve,
- wherein the implant is implanted into a joint through a percutaneous incision, and
- wherein the screw is rotated about its longitudinal axis when mated with the first threaded portion of the sleeve to radially expand the expanding feature and anchor the implant in a respective bone.
A bone implant comprising:
- a screw with a threaded end;
- and
- an annular sleeve accepting the screw, the sleeve comprising:
- a first threaded portion to accept the threaded end of the screw,
- a second threaded portion to accept the threaded end of the screw,
- a first expanding feature along a first portion of the sleeve, and
- a second expanding feature along a second portion of the sleeve,
- wherein the implant is implanted into a joint through a percutaneous incision, and
- wherein the screw is rotated about its longitudinal axis when mated with the first and second threaded portions of the sleeve to radially expand the first and second expanding features and to anchor the implant in the respective bone.
A method of correcting hammertoes comprising the steps of:
- inserting a bone implant into a joint, the bone implant comprising a screw with a threaded end and an annular sleeve accepting the threaded end of the screw;
- and
- expanding one or more portions of the bone implant to anchor the bone implant in a respective bone and compress the joint,
- wherein the step of expanding includes mating the screw with the annular sleeve, rotating the screw about its longitudinal axis to radially expand an expanding feature of the sleeve thereby anchoring the implant in a respective bone of the joint.
Dependencies are inferred from the claim text.