Zhan, Zeng Liwei and Kang Guimei, affiliated stomatological hospital of Nanchang University, published papers to study the disinfection effect of microwave on methacrylate denture and its influence on the mechanical properties of denture base materials. It is pointed out that 700W power microwave radiation for 5 minutes can effectively kill all bacteria on the surface of methacrylate denture, and has no obvious effect on the bending strength and impact strength of methacrylate, so it can be used for disinfection of methacrylate denture base. This article was published in China Journal of Practical Nursing 20 1 1 Volume 27, No.05.

Forty methacrylic resin bases were randomly divided into groups A, B, C and D4, with 65,438+00 dentures in each group, and group D was the control group. The dentures in groups A, B, C and D were put into a beaker containing 200ml distilled water, and the dentures in groups A, B and C were irradiated with 700W power microwave for 3, 4 and 5 minutes, respectively, for bacterial culture. The bending strength and impact strength of methacrylic resin before and after microwave irradiation were tested by universal experimental machine, and the influence of microwave irradiation on the mechanical properties of methacrylic resin was observed.

The bacteriostatic rate of 700W power microwave radiation was ≥90% for 4min, and reached 100% for 5min. There is no significant difference in the 5min bending strength and impact strength of methacrylic resin between the group irradiated with 700W power for 5min and the control group.