S1350101 Cleaning method of the surface of pure titanium for dental material by abrasive jet machining

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  • S1350101 噴射加工による歯科用純チタン表面の清掃法について

Abstract

On a cleaning of dental implant, a conventional abrasive blasting to remove dental biofilm has a possible influence to increase surface roughness of titanium abutment. So we have developed new cleaning method that the agar particle can be blasted by air blasting to remove the biofilm without the influence to titanium surface. Three types particle (agar, calcium carbonate, white fused alumina) were used. Test piece (JIS TYPE2 pure titanium) was rectangle. Initial surface roughness Ra was approximately 0.050μm. Air blasting was performed for 5, 10, 30sec at 20mm distance from test piece. Air pressure was 0.2MPa, particle feed rate was 5g/sec. Then permanent marker had been painted on the test piece as simulated tooth staining. Ra had large increased when calcium carbonate and white fused alumina particle were blasted. There was little change in surface roughness when agar particle was blasted. Ra (agar) indicated 0.068μm. Then the glossiness had decreased a little and the condition of mirror-like surface was able to be maintained almost when agar particle was blasted. In all particle, the paint was peeled from test piece, the capability of cleaning was confirmed. There was little change in surface roughness when agar particle was blasted. Also, the capability of cleaning with agar particle was confirmed. In addition, it is thought that the influence of agar particle on natural tooth is a very small. Therefore, it is thought that development of the new professional plaque control method using the agar particle is profitable.

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