Abstract: Objective: To research Ag-embedded nano-TiO₂ (Ag-TiO₂) antibacterial agent on the properties of two kinds of soft denture liner materials antibacterial effect, to provide a theoretical basis for future application in the clinical. Methods: Ag-embedded nano-TiO₂ was added to sofreliner medium soft lining materials and self-curing soft liner ranging from 0 to 4％. In vitro bacterial culture,the antibacterial effect of samples and antibacterial longer were tested. Results: Analysis of experimental data shows the experimental group compared with control group differences were statistically significant and with Ag-TiO₂ antibacterial agent added mass ratio increased,the antibacterial rate significantly increased. After dealing with the aging of soft lining materials,antibacterial rate changed little compared with before treatment,no significant differences as. Conclusion: Add Ag-TiO₂ antibacterial agent of 2 kinds of soft liner materials has antimicrobial properties,and the antibacterial rate as antibacterial percentage rise significantly increased; At the same time Ag-TiO₂ antibacterial agent has antibacterial effect longer.

Key words: Nano.Ag-TiO₂ antibacterial agent , Soft denture liner , Candida albicans , The antibacterial rateAntibacterial longer