添加壳聚糖的藻酸盐印模材料抗菌性能研究

Objective: To measure the antibacterial activities of the alginate impression materials impregnated with chitosan, make a basic knowledge of antibacterial dental impression materials. Methods: Chitosan with different molecular weight and deacetyl degree added into dental alginate impression materials respectively indifferent ratio. Their antibacterial activities were tested using a method according to the Chinese and Japanese standards for testing antibacterial efficacy of antibacterial materials. Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC6538 are used in this research. Results: Chitosan added in to the alginate impression materials has the best antimicrobial ability for Escherichia coli and Staphylococcus aureus in the ratios of 1% and 1.4%. Its inhibitory bacteria rate can reach 100% along with the increase of deacetyl degree. Conclusions: The alginate impression materials impregnated with chitosan has a favorable antimicrobial ability.