Bone plate having combination locking and compression screw holes
AssigneeBiomet Manufacturing, LLC
InventorsDaniel Duane Fritzinger, Paul G. Kiritsis
Life of this patent
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Abstract
A method of forming a bone plate comprising fabricating a bone plate to include a first through hole, where at least one of a width and a length of the hole changes along a depth of the hole; plunge milling an interior surface of the bone plate demarcating the first through hole to remove at least a portion of the bone plate to increase at least one of the width and the length of the through hole; and, threading at least a portion of the first through hole.
Claims15
A method of forming a bone plate having a top surface and a bottom surface, the bone plate including a hybrid through screw hole comprising:
- fabricating the bone plate to include a through hole having an interior surface defined between a top opening at the top surface and a bottom opening at the bottom surface, wherein a portion of the interior surface tapers inwardly from the top opening toward the bottom opening;
- plunge milling the interior surface of the through hole to provide an unthreaded vertical portion proximate the bottom opening and adjacent to the inwardly tapered portion, wherein the top opening defines a first cross-section having a circular shape, and the bottom opening defines a second cross-section having an oblong shape;
- and
- threading a portion of the inwardly tapered interior surface of the through hole, wherein at least one of a widthwise dimension and a lengthwise dimension of the through hole decreases from the top opening to the bottom opening, while the other of the widthwise dimension and the lengthwise dimension of the through hole does not substantially decrease from the top opening to the bottom opening.
A method of forming a bone plate including a top surface and a bottom surface adapted to receive a biologic substrate, the method comprising fabricating a bone plate to include a combination compression and locking hole, wherein the combination compression and locking hole includes a threaded tapered first portion having a circular, horizontal cross-section extending from the top surface of the bone plate, and a vertically disposed smooth-walled second portion having an oblong, horizontal cross-section adjacent to the threaded first portion, wherein the circular, horizontal cross-section and the oblong, horizontal cross-section lie along differing planes perpendicular to a central axis extending through the combination compression and locking hole and wherein the vertically disposed smooth-wall second portion defines a surfaced opening at the bottom surface of the bone plate.
A method of forming a bone plate having a top surface and a bottom surface comprising:forming a through hole including a first portion defining a central axis extending from a generally circular top opening disposed at the top surface of the bone plate, the first portion having a tapered interior surface that tapers inwardly from the top opening toward the bottom surface;
- threading the tapered interior surface of the first portion;
- milling the through hole to provide an unthreaded second portion of the through hole having a generally oblong bottom opening, wherein the oblong bottom opening includes a first cross-sectional dimension substantially perpendicular to the central axis and substantially equal to the diameter of the circular top opening and a second cross-sectional dimension substantially perpendicular to the central axis and less than the diameter of the circular to opening.
Dependencies are inferred from the claim text.