ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,751,827, issued on Oct. 6.

"Reinforced arthroplasty stems with integrated threaded bosses and internal walker-type compression" was invented by Matthew Lee Klima (Tampa, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An arthroplasty stem includes one or more integrated or sleeved threaded bosses within a metallic stem body and at least one oblique ramped ("Walker") compression aperture. Rotation of a screw within the aperture converts rotational motion into controlled axial compression between the stem and an attached fixation plate or adapter. The threaded bosses, either machined directly into the stem or positioned within dielectric-lined sleeves,...