Indexed tri-planar osteotomy guide and method
AssigneeFirst Ray, LLC
InventorsT. Wade Fallin, Daniel J. Triplett, Robert W. Hoy
Life of this patent
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Abstract
Methods and devices for performing an osteotomy produce a bone cut producing a multi-planar change in the alignment of a bone portion by rotating it relative to another bone portion.
Claims25
An osteotomy system operable to guide the formation of a tri-planar rotational osteotomy between a proximal portion of a metatarsal bone and a distal portion of the metatarsal bone, the tri-planar rotational osteotomy being operable to establish an orientation between the proximal and distal portions of the metatarsal bone incorporating coupled changes in at least two of the intermetatarsal angle, pronation, and plantar flexion of the distal portion of the metatarsal bone, the osteotomy system comprising:
- at least one cutter guide comprising:
- reference features operable to align the cutter guide with the metatarsal bone in a predetermined position;
- one or more cutter guiding features each defining an osteotomy plane or rotation axis relative to the metatarsal bone and corresponding to a coupled change in at least two of intermetatarsal angle, pronation, and plantar flexion of the distal portion of the metatarsal bone, at least one of the change in intermetatarsal angle, pronation, and plantar flexion being user selectable among a plurality of values at the time of surgery;
- a cutter operable to selectively reference one of the one or more cutter guiding features to cut the metatarsal bone to mobilize the proximal portion of the metatarsal bone and the distal portion of the metatarsal bone relative to one another and produce cut surfaces on which the distal portion of the metatarsal bone and the proximal portion of the metatarsal bone are relatively rotatable.
A method of performing an osteotomy on a metatarsal bone having a proximal portion and a distal portion, the proximal and distal portions defining a first relative position between them, the method comprising:
- determining a desired positional change between the proximal portion of the metatarsal bone and the distal portion of the metatarsal bone in at least two anatomic reference planes;
- mounting a guide on the metatarsal bone;
- establishing an osteotomy plane or rotational axis with the guide;
- guiding a cutter in the osteotomy plane or about the rotational axis to mobilize the proximal portion of the metatarsal bone and the distal portion of the metatarsal bone relative to one another and produce cut surfaces on which the distal portion of the metatarsal bone and proximal portion of the metatarsal bone are relatively rotatable, the cut surfaces being oriented to incorporate the desired positional change in the at least two anatomic reference planes;
- rotating the distal portion of the metatarsal bone relative to the proximal portion of the metatarsal bone to a second relative position different from the first relative position;
- and
- fixing the distal portion of the metatarsal bone and the proximal portion of the metatarsal bone relative to one another in the second relative position with the cut surfaces of the proximal portion of the metatarsal bone and the distal portion of the metatarsal bone abutting one another.
An osteotomy system operable to guide the formation of a tri-planar rotational osteotomy between a proximal portion of a metatarsal bone and a distal portion of the metatarsal bone, the osteotomy system comprising:
- at least one cutter guide comprising:
- reference features operable to align the cutter guide with the metatarsal bone in a predetermined position;
- at least two cutter guiding features each defining an osteotomy plane or rotation axis relative to the metatarsal bone and corresponding to a coupled change in at least two of intermetatarsal angle, pronation, and plantar flexion of the distal portion of the metatarsal bone, the at least two cutter guiding features defining osteotomy planes that are angled relative to one another in at least two rotational degrees of freedom;
- a cutter operable to selectively reference one of the at least two cutter guiding features to cut the metatarsal bone to mobilize the proximal portion of the metatarsal bone and the distal portion of the metatarsal bone relative to one another and produce cut surfaces on which the distal portion of the metatarsal bone and the proximal portion of the metatarsal bone are relatively rotatable.
Dependencies are inferred from the claim text.