Introduction: Poor dental and oral hygiene can cause dental and oral problems. Actions that can be taken to maintain dental and oral hygiene are by brushing your teeth and consuming fibrous and watery fruits such as water guava and sweet starfruit, because these fruits containing fiber and water have the ability as a natural cleanser (self-cleansing) on the teeth which can clean the tooth surface by stimulating the flow of saliva. The aim of the study was to determine the effectiveness of consuming water guava and sweet starfruit for self-cleansing at SDN I Gandul, Depok.

Methods: The type of research used is descriptive quantitative with quasi-experimental methods. The research design uses 2 sample groups by measuring pre-test and post-test. The sample used was students of class V-VI at SDN I Gandul, Depok. Data analysis was performed using univariate and bivariate analysis Paired t-test.

Results: The results showed that the average Debris Index before consuming water guava fruit was 1.86 and after consuming water guava fruit was 0.91 and the results of the paired t-test obtained a p-value = 0.000 (<0.05) also the average debris index before consuming star fruit sweet 1.76 and after consuming sweet star fruit 0.97 and the results of the paired t-test obtained p-value = 0.000 (<0.05). It was found that the average plaque index before consuming water guava fruit was 2.1 and after consuming water guava fruit was 1.1 and the results of the paired t-test obtained a p-value = 0.000 (<0.05) also the average plaque index before consuming sweet starfruit was 1. 8 and the average after consuming sweet starfruit was 0.82 and the results of the paired t-test obtained a p-value = 0.000 (<0.05).

Conclusion: It can be concluded that consuming guava and starfruit are effective for the self-cleansing mechanism because there is a decrease in the average debris index and plaque index.