Aim:

To determine the prevalence of gingival recessions and identify risk indicators in school senior students in the city of Valdivia in 2018.

Material and methods:

Descriptive observational study. Prevalence, distribution and type of gingival recession were measured according to Miller classification in school senior students of public and charter establishments in the city of Valdivia, selected by stratified random sampling. A clinical examination was performed by two calibrated examiners using a North Carolina periodontal probe and an individual written questionnaire for each student to assess risk indicators. A descriptive analysis was performed using the statistical program SPSS 18 (IMB® SPSS® software).

Results:

310 students were examined. The prevalence found of at least one gingival recession was 68.4%. Miller’s Class I was present in 97.7%. The jaw presented a higher prevalence of gingival recessions with 64.8% and the lower premolars were the most affected teeth with 47.7%.

Conclusion:

There is a high prevalence of gingival recessions in the population studied. Students in public establishments have a higher prevalence of recessions and a lower frequency of tooth brushing.

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