Disinfection of denture base acrylic resin

Statement of problem. During repair or adjustments of acrylic resin removab le complete and partial dentures, particles of the acrylic resin from the i nterior of the prosthesis may expose dental personnel to microbial health h azards if the prosthesis has not been thoroughly disinfected. Purpose. This study investigates the efficacy of a commercially prepared mi crobial disinfectant (Alcide) on the external and internal surfaces of acry lic resins. Material and methods. Four groups of acrylic resin were incubated in an exp erimental model to simulate the oral environment over time. Specimens were treated in 2 groups, disinfected and not disinfected, and then further grou ped by breaking and not breaking. Analysis was performed with microbial col ony counts, SEM, and statistical analyses. Results. Viable microorganisms still remain on the internal and external su rfaces of treated resins. Conclusion. Chlorine dioxide reduces, but does not eliminate, viable microo rganisms on these dental prostheses.