US Patent 12114870 Osteotomy method and instruments

A method of forming a cavity in bone, the cavity formed and instruments used to form the cavity with an ultrasonic, piezoelectric surgical device for subsequent insertion of a blade implant. The method includes inserting instruments into a cavity to abrade the bone and shape the thickness of the cavity to be equal to or smaller than the implant. The cavity is formed with a generally tapered shape with at least one necked-down portion that may be in a trabecular bone. The instruments include a tip having a working portion with faces angled relative to one another and surface formations that abrade a cavity sidewall surface when moved rapidly and held against the surface.