Patent ID: 9072555
Filing Date: 2015-07-07
Classification: A61B

Abstract:
1. A method of open wedge osteotomy, comprising the steps of: forming an opening in tibia; providing a bone plate to accommodate fixation devices inserted at various angles, the bone plate having a body with a first surface, a second surface opposed to the first surface, the body comprising carbon fiber reinforced polyetheretherketone, the body having a proximal region and a distal region, the proximal region comprising a first plurality of apertures passing through the plate, and the distal region comprising a second plurality of apertures passing through the plate, wherein each of the first and second plurality of apertures is a through hole with a longitudinal axis and comprising non-threaded, rounded and curved internal walls that accommodate a threaded metallic fixation device, the first and second plurality of apertures accommodating threaded metallic fixation devices inserted at a range of angles relative to the first and second plurality of apertures and non-parallel to the longitudinal axis of each through hole, wherein the non-threaded, rounded internal walls have a uniform configuration along the longitudinal axis of each through hole, and wherein each of the threaded fixation devices has a first uniform diameter, and wherein each of the first and second plurality of apertures has a second uniform diameter, the second diameter being smaller than the first diameter, to allow the threaded metallic fixation device to deform the smooth, non-threaded internal walls of the first and second plurality of apertures upon insertion, for securing the bone plate to the bone, and wherein the body of the plate is formed of a material softer than a material of the threaded metallic fixation device; positioning the bone plate over the opening in the tibia; forming proximal holes in the tibia with unidirectional drill sleeve and through the first plurality of apertures of the proximal region of the bone plate; forming intermediate and distal holes in the tibia with multidirectional drill sleeve and through the second plurality of apertures of the distal region of the bone plate; and inserting the threaded fixation devices through the first and second plurality of apertures, so that threads of the threaded fixation devices deform and thread the non-threaded internal walls of the first and second plurality of apertures upon insertion and self-thread the through holes at an angle, to secure the bone plate to the tibia.