This material is subjected to rigor ous quality control and is evaluated according to procedures set forth under ABNT/NBR Standard out in Ministry of Health Ordinance 2914/2011, re sulting from the reuse and purification of materi als arising from the processing of phosphate rock, which contributes to the preservation of natural resources at the same time while at the same time protects the oral health of the population by strengthening teeth enamel.