“…Regarding microhardness, the use of the Vickers microhardness technique was predominant in the in vitro studies observed, due to its accuracy for the methodologies used (Garoushi, Vallittu, Lassila, 2018;Parasher et al, 2020;Spajic et al, 2019 Research, Society and Development, v. 10, n. 3, e43310313413, 2021(CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i3.13413 Fleming, 2015Tanthauch et al, 2014). Instead to what was observed for flexural properties, in some studies the material suffered a reduction in microhardness when submerged in some solutions (Choi et al, 2019;Silva et al, 2019;Tanthanuch et al, 2014;Kooi et al, 2012). In addition, the polymerization protocol influenced the microhardness of the giomer, as well as the supervised whitening at home protocol (Kaya et al, 2018;Kimyai et al, 2017;Gonulol, Ozer, Tunc, 2016).…”