Abstract

DE LA ROSA-NAJERA, EE et al. Evaluation of the bactericidal effect of UV-LED light on alginate impressions. Av Odontoestomatol [online]. 2023, vol.39, n.1, pp.42-48.  Epub May 29, 2023. ISSN 2340-3152.

The oral cavity houses a large number of microorganisms that are potential pathogens, such as cytomegalovirus, hepatitis B virus (HBV), hepatitis C virus, herpes simplex virus types 1 and 2, human immunodeficiency virus, mycobacterium tuberculosis and currently with the appearance of the SARS COV-2 that causes covid-19, the dental community must take stricter measures in its protection protocols against diseases. To evaluate its germicidal efficacy, ultraviolet light was applied with different exposure times on the alginate dental impressions, immediately after having taken the impression, which when it came into contact with the oral cavity of the patient is contaminated. As a result, a decrease in size and quantity of the bacterial colonies was observed in most of the samples in which the UV LED light was applied at 10 and 15 minutes of exposure. Some samples showed less bacterial growth even after 5 minutes of exposure. All this confirms its germicidal capacity thanks to its 245 nm ultraviolet spectrum that affects the DNA and RNA chain of microorganisms since it is the wavelength of maximum absorption of its molecule, eliminating its reproductive and survival capacity. The advantages it offers such as its small size, easy to handle and install, that it does not require constant maintenance, low acquisition cost; its constant high intensity light that does not generate any increase in temperature, makes it an excellent disinfectant auxiliary that can be incorporated into dental clinics.

Keywords : Covid-19; cross contamination; microorganisms; UV-LED.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )