The Rg Titanium Dedicated Low-melting Ceramic Powder Developed

The key idea of this paper is finding a way to produce a system of dental porcelain, which is compatible with titanium and to improve the bonding strength between titanium and porcelain. The RG body porcelain was prepared via melting silicon, boron, aluminium, sodium, potassium oxide and calcium oxide etc at l500C and then quenching into water. The RG opaque porcelain was prepared via melting the body porcelain with titanium, cerium, stannic oxide and zinc oxide at 10000C and then quenching into water. In this paper the inicrostructure and the mechanical properties of the RG body porcelain and the RG opaque porcelain were studied. Some compositions were well used to control the thermal expansion ratio and the glass temperature of the RG porcelain system. The mechanical properties of the system meet the clinical standard. In this paper, compared with the samples of titanium - Noritake Super porcelain TITAN, titanium ?VITA TITANKERAMIK and Nr- Cr alloy-Vita VMK 99 porcelain, the interface of titanium and experiment porcelain was studied by scanning electron microscope and X-ray photoelectron spectroscopy; the three-point bonding strength of titanium and experiment porcelain was tested. The results show no porosity and crackle in the interface suggesting titanium and experiment porcelain bonding well. The bonding strength of titanium and experiment porcelain was lower than the bonding strength of Nr- Cr alloy and Vita VMK 99 porcelain significantly, and was not different with the bonding strength of titanium and Noritake Super porcelain TITAN, titanium and VITA TITANKERAMIK. I Abstract The effect of oxide behaviour of titanium on bonding strength of titanium and experiment porcelain was investigated by using scanning electron microscope, XRD, oxide adherence strength tension test and three-point bonding strength test. The results show oxidation of titanium at high temperature resulting in low bonding strength of titanium and porcelain.