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Publication Number
US-12226107-B2
Publication Date
2025-02-18
Expiration Date
Abstract
A bone cut guide includes a first portion having a first cut slot and having an aperture for receiving a wire to connect the first portion to a first bone. A second portion has a second cut slot and a second aperture for receiving a second wire to connect the second portion to a second bone. The first portion and the second portion are movably connected to each other to allow the first bone and the second bone to move relative to each other.
Core Innovation
The invention relates to a bone cut guide for correcting hallux valgus and/or intermetatarsal angle. The guide includes a first portion having a first cut slot and an aperture for receiving a wire to connect the first portion to a first bone, and a second portion having a second cut slot and a second aperture for receiving a second wire to connect the second portion to a second bone. The first portion and the second portion are movably connected to allow the first bone and the second bone to move relative to each other.
Moving the second portion distally causes a distal advancement of a medial side of the second bone, while a lateral side of the second bone is held in place by the second wire. This relative movement is used to decrease an angle between the second bone and a metatarsal. The guide supports creating bone cuts that remain aligned with the connected bones during the adjustment.
The disclosed structure further includes a compression-distraction fixture to drive the movable connection by an actuated screw and a threaded rack configured to translate the second portion distally while maintaining the first and second cut slots in a parallel configuration. Wire guiding and positioning concepts are used to set initial wire references, inhibit guide rotation, and inhibit upward drift during the parallel saw cuts. The adjustment is maintained during fusion/hardware placement, and angle-of-obliquity correction is discussed using bone wedges and corrected planar bone surfaces.
Claims Coverage
The document provides one independent claim directed to a bone cut guide with two movably connected portions whose distal relative movement changes a bone-to-metatarsal angle by advancing a medial side while holding a lateral side in place using wires. Dependent claims refine the independent claim with a compression-distraction fixture, screw-and-rack actuation, additional wire-based rotation inhibition, and substantially parallel cut-slot alignment.
Movably connected first and second portions with wire-connected bones to change a bone-to-metatarsal angle
A first portion having a first cut slot and an aperture for receiving a wire to connect the first portion to a first bone; a second portion having a second cut slot and a second aperture for receiving a second wire to connect the second portion to a second bone; the first portion and the second portion movably connected to allow the first bone and the second bone to move relative to each other, wherein moving the second portion distally causes a distal advancement of a medial side of the second bone and a lateral side of the second bone is held in place by the second wire to cause an angle between the second bone and a metatarsal to decrease.
Compression-distraction fixture for moving the guide portions relative to each other
The bone cut guide includes a compression-distraction fixture connected to the first portion and the second portion to move the first portion relative to the second portion.
Screw-and-rack compression-distraction actuation
The compression-distraction fixture includes a user-turnable screw and a rack engaging the screw to move a first portion relative to a second portion.
Distal movement of the second portion when a screw is advanced
The compression-distraction fixture moves a second portion distally away from a first bone when a user advances a screw.
Additional wire aperture to inhibit rotation about a wire
The first portion includes a third aperture that receives a third wire to connect the first portion to the first bone and thereby inhibit a rotation of the first portion about the first wire.
Substantially parallel longitudinal cut-slot directions
The first cut slot and the second cut slot extend longitudinally in substantially parallel directions.
Overall claim coverage centers on a two-portion bone cut guide where relative distal motion between wire-connected portions decreases an angle between a second bone and a metatarsal by advancing a medial side while holding a lateral side fixed via the wire, with dependent claims further specifying compression-distraction screw-and-rack actuation, rotation inhibition using an additional wire, and substantially parallel longitudinal cut-slot alignment.
Stated Advantages
Decreases an angle between the second bone and a metatarsal by advancing a medial side while holding a lateral side in place.
Documented Applications
Use in correcting hallux valgus and/or intermetatarsal angle, including as part of a Lapidus procedure involving first TMT joint hypermobility.
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