Bacterial Cross-contamination between clinic& dental laboratory during polishing procedure of complete denture

Abstract

Polishing of dental prostheses can cause a dangerous cycle of cross-contamination
involving dentists, laboratory technicians, patients and auxiliary personnel. The aim of
this study was to show the microbial contamination in the dental laboratory during the
polishing procedure of complete dentures. For this purpose, 30 samples & 4
experiments were conducted.
Experiment I - Determination of the contaminating complete maxillary dentures
from plaque &from patient saliva .
Experiment II- after disinfection of complete dentures
Experiment III- determination of microorganism transferred During the polishing
procedure, to the denture
Experiment IV - The remaining microorganism in the lathe spindle Microbiological
tests were conducted to detect the presence of bacteria. plates showing growth,
colonies were observed and identified using Gram staining,. As a result viable
organisms from patients denture before and after polishing & after disinfection
were found Improper disinfection of the denture , using tab water with pumice
powder allowed for the introduction of pathogens so The polishing of dental
prostheses is a possible source of transmission of communicable diseases in the
laboratory appropriate universal precautions must be followed to decrease the
likelihood of cross contamination