Keywords
mold disinfection
Peracetic acid
Sodium Hypochlorite
hydrogen peroxide
How to Cite
Abstract
Objective: to evaluate the effect of disinfection on the dimensional stability of three different impression materials. Material and methods: using a specific matrix (ADA.1933 standard), molds were obtained in addition silicone, polyether and alginate (n=60) which were subdivided into 6 subgroups (I- control (washed only); II- Bacterend OX 0, 5%; III- Bacterend OX 1%; IV- Bacterend OX 2%; V- hydrogen peroxide 1%- BlueM VI-sodium hypochlorite 1%). Measurements were taken, by a single calibrated operator, using a comparator microscope (Mitutoyo MFG. Co. Ltd., Japan), of the metal matrix and each specimen, at determined points. Measurements were taken 3 times and the average was calculated. The formula (A-B/Ax100) was used for each specimen. The data were tabulated and statistically analyzed. To evaluate the difference between groups, the quantitative variable was tested for normal distribution with the Shapiro-Wilk test. The difference between two groups was evaluated by the Man-Withney test (p<0.05) Results: Compared to the control groups, subgroups II, III and V did not show dimensional changes in the 3 impression materials; subgroups IV (in materials AS and P) and all subgroups VI showed statistically significant dimensional changes. Conclusion: Based on the data collected, it seems reasonable to conclude that 0.5% or 1% peracetic acid in equilibrium and 1% hydrogen peroxide do not promote dimensional changes in addition silicone molds (VPS), polyether (Impregum) or alginate ( Hydrogun). Peracetic acid in equilibrium at 2% concentration should not be used on silicones and 1% sodium hypochlorite on any of the materials.
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Copyright (c) 2024 Amanda Weiss Massambani, Ana Flávia Sanches Borges, Karla Druzian Oliveira, Letícia Florindo Pereira, Fábio Campos Serra, Ivete Aparecida de Mattias Sartori