Pillaga Merino, Kelin Liceth, et al. “RELATION BETWEEN NUMBER OF BRUSHES PER DAY AND PERIODONTAL INDEX IN 12 YEARS OLD SCHOOL IN THE PARISH THE VECINO CUENCA-ECUADOR 2016”. Killkana Salud Y Bienestar, vol. 6, no. 2, May 2022, pp. 13-22, https://doi.org/10.26871/killcanasalud.v6i2.650.