Patent EA-003728-B1 (EA)
Title: Method for surface treatment of implants or prosthesis made of titanium or other materials
IPC: A61F2/38
Filed: 2001-09-14
Abstract: l. The surface treatment of implants and prostheses in titanium and other materials with a polished surface in the upper section and in the threaded section and with a rough surface in the rest of the threaded section up to the apical end including, if necessary, said apical end, using a mixture of acids to create surface roughness, and characterized by the following features: the implant is treated successively and separately with three different acids: hydrofluoric acid at a concentration of 15% for a period of seconds; sulphuric acid at 97% and at 70 degree C for 3 minutes; and hydrochloric acid at 36.5% and at 70 degree C for between 3 and 5 minutes. Following treatment with the hydrochloric acid the surface is neutralized with sodium carbonate for between 5 and 30 seconds, without being shaken, and is then finished with successive washings of deionized water. Ultrasound treatment can be used if necessary, wherein the rough surface of the implant or prosthesis in question is coated with a layer of plasma rich in growth factors, obtained from the blood of the patient. 2. The method according to claim 1 wherein a bioactive implant or prosthesis surface is created by coating the rough surface of the implant or prosthesis with the plasma in question prior to it being inserted into the alveolus in question. 3. The method according to claim 1 wherein a bioactive implant or prosthesis surface is created by placing plasma inside the alveolus so that when the implant or prosthesis is inserted the plasma comes into contact with and coats the rough surface of the implant or prosthesis. 4. The method according to claim 1 wherein a bioactive implant or prosthesis surface is created by coating the rough surface of the implant or prosthesis with the plasma in question and then by inserting it into the alveolus into which plasma has also been placed prior to insertion. 5. The surface treatment of implants, according to claim 1 wherein both the concentration of acids used and the time needed to apply them on the required surface of the implant can be increased so that the surface can be etched more deeply. 6. A titanium implant or prosthesis for knee or hip prostheses or osteosynthesis systems in general, with a polished surface in the upper section and in the threaded section and with a rough surface in the rest of the threaded section up to the apical end including, if necessary, said apical end, wherein a rough surface is created by successive and separate applications of hydrofluoric, sulphuric and hydrochloric acids, and which is then neutralized by sodium carbonate and on which the height of the peaks ranges from 0.2 to which they are applied and where the rough surface is coated with a layer of plasma rich in growth factors, which has been obtained from the blood of the patient. 7. A titanium implant or prosthesis for knee or hip prostheses or osteosynthesis systems in general according to claim 1 wherein the stem or the threaded or unthreaded section of the implant to be inserted into the bone is etched to make it rough, while the remainder of the implant is left unetched so as not to create more osteoconductive surface than is necessary.