Mechanism of action of TiF4 on dental enamel surface: SEM/EDX, KOH-Soluble F, and X-Ray diffraction analysis - Comar, L. P.; Souza, B. M.; Al-Ahj, L. P.; Martins, J.; Grizzo, L. T.; Piasentim, I. S.; Rios, Daniela; Buzalaf, Marília Afonso Rabelo; Magalhães, Ana Carolina (Caries Research, 2017)