Influência do filtro solar facial na dose de radiação durante aquisições radiográficas intraorais

Abstract

The use of facial sunscreens has significantly increased in the last few years, especially in the facial area, aiming to provide photoprotection against sun exposure. The inorganic class of these products apply metallic oxides in their composition as physical barriers for protection against ultraviolet (UV) radiation. Since these metallic components physically block UV radiation, and considering the widespread use of sunscreens on the facial area, it raises the question about their influence as a physical barrier against X radiation as well. Therefore, the aim of this study was to assess whether the use of different classes of facial sunscreens influences the absorbed radiation dose during intraoral radiographic acquisitions. For this in vitro study, two classes of facial sunscreens (Bioderma®) with a sun protection factor (SPF) 50 were used: one purely organic and the other purely inorganic. A mold made of addition silicone was placed inside a circular polystyrene plate measuring 60x15 mm, which had spaces in the center for the insertion of a thermoluminescent dosimeter (TLD) and, above it, a photostimulable phosphor plate (PSP) (Digora Optime®). After standardizing the recommended amount of facial sunscreen with the aid of a precision balance, it was deposited in the PSP. Using an intraoral X-ray machine, 5 radiographs were taken, under the same exposure parameters, for each of the groups: 1 - without facial sunscreen (control), 2 – organic facial sunscreen, and 3 - inorganic facial sunscreen. The radiation dose was evaluated in mGy, and the obtained data were compared between the groups using one-way analysis of variance, with Tukey's post-hoc test. It was observed that group 3 had a lower radiation dose compared to groups 1 and 2. There was no difference between groups 1 and 2. In conclusion, the inorganic facial sunscreen interferes in the absorbed radiation dose, reducing it.