2007 Volume 27 Issue 1 Pages 1-9
Since titanium-fixed prosthodontics fabricated by CAD/CAM systems have a relatively smooth surface, should be modified the adhesive surface of the machined crown to provide excellent bonding. The purpose of this study is to investigate the treatment condition of tribo-chemical treatment with silica-coated alumina particles to commercially pure titanium (cpTi) for the bonding characteristics with resin-based luting cements.
We used three kinds of alumina particles. Two types of silica-coated alumina powder with average particle sizes of 110, μm (TCP) and 30μm (TCS) were used for the tribo-chemical treatment. Alumina powder with an average particle size of 110μm (SB) was used for sandblasting as a control.
Both SiO2 and Al2O3 were detected on cpTi plates after tribo-chemical treatment with TCP and TCS. Even if the surface modification of cpTi was affected by the pressure condition of the treatment, we suggested that cpTi should be subjected to tribo-chemical treatment at a pressure lower than 0.28 MPa, as recommended by the manufacturer, to decrease deformation and minimize volume loss.
The shear bond strength of cpTi after tribo-chemical treatment with a resin-based luting cement seemed to be high enough even when using a lower pressure and lower angles than those recommended by the manufacturer.
These findings suggest that tribo-chemical treatment can be applied for the practical surface treatment of cpTi to improve bonding with resin-based luting cements.
