It is very important to obtain the maximum sterilization and antibacterial effect inside the dental clinic. This study aimed to explore the antibacterial effect of the ultrasonic fogger machine. The method is based on spraying an antibacterial agent inside the dental clinic and calculating the number of colony-forming units (that will appear on agar plates) before and after using the fogger machine. 10 samples were taken from the environment of the dental clinic (the operation room), these samples were streaked on blood agar and incubated. After 24 hours, the colony-forming units were calculated. Another sample was taken after using the fogger machine, and also streaked on blood agar and incubated. The colony-forming units were calculated again. The fogger machine showed good antibacterial effects with about 60% of the bacterial colonies were disappeared. Based on the results of this study, the fogger machine was a good choice in sterilizing the dental clinic environment.
