Effect of middle layer by liquid-phase deposition technology on bonding strength of porcelain and pure titanium

Objective: To investigate the effect of middle layer with liquid-phase deposition(LPD) technology on bonding strength of titanium and porcelain in different condition.Methods: Fifty pure titanium specimens were randomly divided into ten groups(n = 5) according to different surface treatments after sandblasting.The surface of titanium was investigated by scanning electron microscope(SEM).After the middle area of the samples was veneered with porcelain,a three-point-flexure-test was used to evaluate the bonding strength of titanium to porcelain.Results: The bonding strength of groups of liquid-phase deposition were significantly higher than control group(P 0.05).The mean bonding strength of pH = 9,0.3 mol / L silicate solution group was the highest[(38.86 ± 2.63) MPa],it was significantly higher than those of other nine groups(P 0.05).Conclusion: Middle layer prepared by LPD technology was significant in improving bonding strength of porcelain and pure titanium,the bonding strength was the highest by pH = 9,0.3 mol / L silicate solution.