Objective: The present study was to determine the prevalence and degree of fluorosis in schoolchildren aged 8 to 10years in an educational institution Methodology: It was a quantitative, descriptive, cross-sectional and prospectiveresearch, with a sample of 160 students from 8 to 10 years of age from the Ferreñafe Educational Institution, the data werecollected through clinical evaluation and analysis, with a record sheet based on Dean's Criteria for dental fluorosis. Results:85% of the observed participants had fluorosis, in addition, 56.3% of the children had mild fluorosis, 25% moderate grade,and 13.8% severe fluorosis. Mild fluorosis predominated in both sexes with 58.2% in females and 56.3% in males, and in58.7%, 55.7% and 50% in children aged 8 years, 9 years and 10 years, respectively. Conclusions: The prevalence offluorosis was high, the female sex had a higher prevalence of sev...