The invention relates to a method for manufacturing an ultrasonic tip for an apicoectomy, such that the tip has a shape suitable for the shape of a tooth root, comprising the steps of: forming a feedstock by mixing a metal powder including stainless steel with a binder； injecting the feedstock to form an injection-molded part having a plurality of projections integrally formed on the surface thereof； performing debinding to remove the binder from the injection-molded part； sintering the injection-molded part； and performing annealing to increase the ductility and facilitate the bending of the sintered part.
