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US 8,828,063 B2Granted
Fixation plate for use in the Lapidus approach
AssigneeAMEI Technologies Inc.
InventorsNeal Blitz, Michael George
Life of this patent
Estimating the term…
Abstract
The present disclosure generally relates to fixation plates for use in correcting Hallux Valgus deformities under the Lapidus approach. The plate includes holes defined therethrough in such a way to facilitate multiplanar stability across the metatarsocuneiform joint. The plate is further sized and shaped to approximate the natural anatomic contour of the bone segments surrounding the metatarsocuneiform joint. Related methods for using the Lapidus approach to correct Hallux Valgus deformities are also described.
Claims20
A device, comprising:
- a plate adapted for fixation across a metatarsocuneiform joint, the plate including a joint axis defined to lie across the metatarsocuneiform joint, an upper surface and a bone-contacting surface opposite to the upper surface, the plate including a curvature directed towards the bone-contacting surface along a longitudinal axis of the plate, and the plate including a bend about a second axis different from the longitudinal axis and directed toward the bone-contacting surface,
- a proximal portion adapted for fixation to a cuneiform, the proximal portion including a first hole adjacent to the joint axis and a second hole proximal to the first hole, and
- a distal portion adapted for fixation to a metatarsal, the distal portion including a third hole adjacent to the joint axis and a fourth hole distal to the third hole, wherein the proximal and distal portions are divided along the joint axis, a first line segment is defined from a center of the first hole to a center of the second hole, a second line segment is defined from the center of the second hole to a center of the third hole, a third line segment is defined from the center of the third hole to a center of the fourth hole, a fourth line segment is defined from the center of the fourth hole to the center of the first hole,
- the first line segment, second line segment, third line segment and fourth line segment define a substantially trapezoidal arrangement across the joint axis, and wherein a width of the distal portion is 10.5+/−3 millimeters.
1 more element
A method for fusing a metatarsocuneiform joint, comprising:
- positioning a fixation plate adjacent to a medial cuneiform, the plate adapted for fixation across a metatarsocuneiform joint, the plate including a joint axis defined to lie across the metatarsocuneiform joint, an upper surface and a bone-contacting surface opposite to the upper surface, the plate including a curvature directed towards the bone-contacting surface along a longitudinal axis of the plate, and the plate including a bend about a second axis different from the longitudinal axis and directed toward the bone-contacting surface,
- a proximal portion adapted for fixation to a cuneiform, the proximal portion including a first hole adjacent to the joint axis and a second hole proximal to the first hole, and
- a distal portion adapted for fixation to a metatarsal, the distal portion including a third hole adjacent to the joint axis and a fourth hole distal to the third hole, wherein the proximal and distal portions are divided along the joint axis, a first line segment is defined from a center of the first hole to a center of the second hole, a second line segment is defined from the center of the second hole to a center of the third hole, a third line segment is defined from the center of the third hole to a center of the fourth hole, a fourth line segment is defined from the center of the fourth hole to the center of the first hole,
- the first line segment, second line segment, third line segment and fourth line segment define a substantially trapezoidal arrangement across the joint axis, and wherein a width of the distal portion is 10.5+/−3 millimeters,
- securing the plate to the cuneiform using three screws triangularly oriented through the plate;
- laterally and inferiorly translating and rotating a metatarsal such that an end of the metatarsal abuts the cuneiform and fits into the recess defined by the plate;
- and securing the plate to the metatarsal using three screws triangularly oriented through the plate.
4 more elements
Dependencies are inferred from the claim text.