Patent ID: 8790376
Filing Date: 2014-07-29
Classification: A61B,B23C,B23P,Y10T

Abstract:
1. 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.