“…Tannins' role in collagen crosslinking and propensity to strong (Santos-buelga and Scalbert, 2000; Shimada, 2006), difficult to hydrolyze bonds (Shimada, 2006) make it an interesting theoretical agent for dentin remineralization and for preventing degradation of enamel and dentin surfaces via both inhibition of collagenolytic enzymes and strengthening existing dentin matrices. Of the 14 studies appraised exploring GSE's role in dental remineralization, tensile strength, and preventing degradation, 11 found significant benefits to dentin microhardness with GSE treatment conditions compared with control (Bedran-Russo et al, 2013;Benjamin et al, 2012;Boteon et al, 2017;Epasinghe et al, 2014;Jawale et al, 2017;Macedo et al, 2009;Mirkarimi et al, 2013;Rubel et al, 2016;Saragih et al, 2017;Shi et al, 2015;Silva et al, 2015;Tang et al, 2013;Xie et al, 2008;Yassen and Safy, 2018). Compared with no treatment, GSE showed consistent and significant improvement in both remineralization from acid etched surfaces and degradation of dentin by acid rich environments (Benjamin et al, 2012;Boteon et al, 2017;Epasinghe et al, 2014;Jawale et al, 2017;Mirkarimi et al, 2013;Rubel et al, 2016;Saragih et al, 2017;Shi et al, 2015;Xie et al 2008;Yassen and Safy, 2018).…”