Antimicrobial effects of silver zeolite, silver zirconium phosphate silicate and silver zirconium phosphate against oral microorganisms

To evaluate the antimicrobial activities of silver inorganic materials, including silver zeolite ( AgZ) , silver zirconium phosphate silicate (AgZrPSi) and silver zirconium phsopahte (AgZrp), against oral microorganisms. In line with this objective, the morphology and structure of each type of silver based powders were also investigated.

Methods

The antimicrobial activities of AgZ, AgZrPSi and AgZrP were tested against Streptococcus mutans, Lactobacillus casei, Candida albicans and Staphylococcus aureus using disk diffusion assay as a screening test. The minimum inhiditory concentration (MIC) and minimum lethal concentration (MLC) were determined using the modified membrane method. Scanning electron microscope and X-ray diffraction were used to investigate the morphology and structure of these silver materials.

Results

All forms of silver inorganic materials could inhibit the growth of all test microorganisms,

Conclusions

Silver inorganic materials in the form of AgZ, AgZrPSi and AgZrp had antimicrobial effects against all the test oral microorganisms and those activities may be influenced by craystal structure of carriers.

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