Analysis of the surface of healthy and fluorotic human enamel using microhardness test. Superficies y Vacio [Internet]. 2017 Mar. 15 [cited 2025 Apr. 4];30(1):6-9. Available from: https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/2017_syv30_1-010006