Study on disinfection effectiveness and properties of acrylic resin via microwave irradiation sterilization
10.3760/cma.j.issn.1672-7088.2011.05.042
- VernacularTitle:微波消毒甲基丙烯酸树脂义齿的实验研究
- Author:
Lilin ZHAN
;
Liwei ZENG
;
Guimei KANG
;
Yuying YING
;
Xiaoping HU
- Publication Type:Journal Article
- Keywords:
Microwave irradiation;
Disinfection;
Acrylic resin;
Flexural strength;
Impact strength
- From:
Chinese Journal of Practical Nursing
2011;27(5):5-8
- CountryChina
- Language:Chinese
-
Abstract:
Objective The purpose of this study was to evaluate the disinfection effectiveness and properties of acrylic resin via microwave irradiation. Methods Forty acrylic resin base dentures fabricated in a standardized procedure were chosen and divided into Group A,B,C and D randomly. Group A,B and C were immersed in 200ml distilled water and submitted to microwave irradiation at 700W for 3,4,5 minutes individually. Group D was used as positive control. Bacteria specimens from each group were got for culture and numbers were calculated. Then the four groups were tested for the flexural strength and impact strength by universal test machine before and after microwave irradiation sterilization. Results The germicidal ratio of Group B was more than 90% ,while the ratio of group C was 100%. There was no significant difference in flexural strength and impact strength between group C and group D. Conclusions Microwave irradiation for 5 minutes at 700W produced sterilization of dentures contaminated with all bacteria whereas the denture strength is not affected. Microwave irradiation at 700W solution for 5 minutes was effective to sterilize acrylic resin base dentures.
