Effect Of Different Surface Treatment On The Micro Leakage And Bond Strength Of Porcelain Composite Resin

Objective This experiment uses three different means of zirconia Vita ceramic and porcelain surface processing, to detect edge between composite resin and ceramic layer surface micro leakage situation. Combined with the application of silane coupling agent at the same time, through the bonding interface of artificial aging test, compare three methods of surface treatment for porcelain and composite resin bonding interface ageing resistance, and observed under scanning electron microscopy porcelain, the microstructure of the composite resin bonding interface, in order to choose more reasonable porcelain layer surface treatment and more effective bonding system, provide a reference basis for clinical application.Methods Will be 48 to 12 mm in diameter, 2.5 mm high Vita body porcelain and zirconia ceramic compact after cutting in vacuum porcelain furnace sintering. Preparation of zirconium oxide growth 1.5 cm wide, 0.8 cm high specimens, a total of 120 surface smooth without air bubbles. Two kinds of specimens were randomly divided into pickling, sand blasting, sand blasting and acid corrosion, the control group four groups, each group were then divided into coating and silane coupling agent and the control group, all filling composite resin column 2 mm high. Each group of porcelain specimen after silver staining experiment, metallographic microscope determination of dyeing depth, comparing the micro leakage value. Zirconium oxide groups of specimens after artificial aging experiment, using the universal testing machine compare the shear bond strength.Results(1). After different surface treatment of the surface of the porcelain and composite resin bonding interface between the edge of the micro leakage value at the same time of significantly lower than the control group from low to high order for pickling, sand blasting, sand blasting and acid corrosion group. Coating method, groups of micro leakage of the coupling agent below without coupling agent group.After the analysis of variance and two more q test between groups, each group of micro leakage value differences were statistically significant(P < 0.05).(2). The zirconia ceramic layer surface after three kinds of surface coating and silane coupling agent in the treatment group, acid corrosion and combined with silane coupling agent group of bond strength maximum penetration minimum, sandblasting group second, sand blasting and acid corrosion set a minimum.(3). The zirconia ceramic layer surface three different treatment group received the shear bond strength between porcelain and composite resin is significantly higher than control group(p < 0.05), among which the shear bond strength of acid corrosion, the largest sandblasting group second, sand blasting and acid corrosion set minimum. And can see that the application of silane coupling agent can significantly improve the bonding strength between porcelain and composite resin, was statistically significant(p < 0.05).Conclusions 1. The surface of porcelain for different mechanical and chemical treatment of porcelain- composite resin bonding interface edge micro leakage of important factor. 2. The silane coupling agent can reduce the body micro leakage between porcelain and composite resin, and enhance its edges fit.3. After three different surface treatment, all can improve the porcelain layer surface and the bonding shear strength between composite resin, acid corrosion group effect is best. Acid corrosion significantly improve the surface roughness of zirconia ceramics, can improve the surface wettability, improve the bond strength between zirconia ceramics and composite resin.