Effect of Different Exposure Times on Microwave Irradiation on the Disinfection of a Hard Chairside Reline Resin

Abstract

This study suggests that 3 minutes of microwave irradiation can be used for acrylic resin sterilization, thus preventing cross-contamination.

Cell Membrane Integrity of Candida Albicans after Different Protocols of Microwave Irradiation

“…When selecting a disinfection procedure, its effect on the physical and mechanical properties of the denture materials shouldbe carefully considered [36,37]. Prev ious clin ical studies showed that microwave d isinfection at 650 W for 3 min did not cause detrimental effects on the linear dimensional stability of co mplete dentures [38].…”

Microwave assisted disinfection method in dentistry

“…A study evaluated the effectiveness of microwave disinfection on three hard chairside reline resins and observed a consistent sterilization after microwave exposure (Neppelenbroek et al, 2003). In other investigations (Dixon et al, 1999;Mima et al, 2008), microwave irradiation resulted in sterilization of a hard chairside reline resin and soft denture lin e r s c o n t a m i n a t e d b y f o u r p a t h o g e n i c m i c r o o r g a n i s m s . I t i s a l s o i m p o r t a n t t o e m p h a s i z e t h a t d i s i n f e c t i o n b y m i c r o w a v e s promotes inactivation of the pathogenic microorganisms present on both the surface and inside the pores of the acrylic materials (Chau et al, 1995;Dixon et al, 1999).…”

“…The consistent results from several studies, in which strains were completely inactivated when microwave irradiation was carried out with the specimens immersed in water, confirm this hypothesis. According to scanning electron microscopic (SEM) studies (Neppelenbroek et al, 2003;Mima et al, 2008), microwave irradiation not only inactivated C. albicans, but also removed the nonviable yeast cells from resin surface. In this case, the irradiation was performed with the resin specimens immersed in water and, since water started to boil after approximately 1.5 minutes of irradiation, the movement of the water particles probably removed microbial cells from the resins.…”

Estudo in vitro da formação do biofilme de Candida albicans em resina acrílica termopolimerizável revestida por nanopartículas de dióxido de silício (revestimento cerâmico)

“…Após a análise da rugosidade e polimento líquido, todos os espécimes foram embalados individualmente para esterilização por óxido de etileno (Acecil -Central de esterilização comércio e indústria, Campinas, SP) MIMA et al, 2008).…”