METHOD FOR THE PREPARATION OF SURFACES OF DEVICES MADE OF TITANIUM OR TITANIUM ALLOYS, ZIRCONIUM, ZIRCONIA, ALUMINA OR ZIRCONIA/ALUMINA COMPOUNDS, STAINLESS STEELS FOR MEDICAL USE AND COBALT-BASE SUPERALLOYS FOR MEDICAL USE IMPLANTABLE IN THE HUMAN OR ANIMAL BODY, HAVING AS A RESULT NANOMETER ROUGHNESS, FORMATION OF SELF-INDUCED SURFACE OXIDE, HIGH ANTI-METALOSIS CLEANING AND POSSIBLE PREPARATION OF PARTS WITH SURFACE ANTIMICROBIAL TREATMENT
A method for the surface preparation of devices made of titanium or titanium alloys, zirconium, zirconia, alumina or zirconia/alumina compounds, stainless steels and cobalt-base superalloys for medical use； the devices being implantable in the human body or in animals and attached extracorporeal parts made with the same materials, particularly for dental and orthopedic implantology. The implantable device is treated by exposing at least one portion of the surface of the device to a solution including hydrofluoric acid, phosphoric acid, at least one surfactant substance and water； for a time period and in conditions sufficient to provide the surface of the implant with the desired surface roughness and the formation of self-induced surface titanium dioxide, maintaining the structural integrity of the device and without altering the centesimal measurement size. The surface thus is rinsed with demineralized water and ultrasounds in order to prevent metalosis phenomena.
