Abstract: Objective To study the effect of adding Tetrapod-like Zinc Oxide Whisker (T-ZnOw) on the antibacterial property of alginate impression materials. Methods T-ZnOw was added into the alginate impression materials in different proportions, including 0%, 1%, 3%, 5%, 7%, and 10%. The effect of antibacterial properties on Candida albicans was detected by sticking method. Results The experimental group and the control group were statistically significant (P＜0.05). As the dosage increased, the antibacterial rate increased. When the dosage was as much as 5%, the antibacterial rate was more than 99%. Conclusion Adding T-ZnOw can increase the antibacterial property, and 5% is the optimum dosage.

Key words: Tetrapod-like Zinc Oxide Whisker（T-ZnOw）, Alginate impression materials , Antibacterial, Candida albicans