ABSTRACT
Introduction: Erosion is a common dental problem that is especially prevalent in children due to the
increasing consumption of acidic food and beverages. APF gel is believed to be effective in reducing the
demineralization effect of the teeth as well as escalating the remineralization process. This research aims
to determine and evaluate the effectiveness of 1.23% APF gel as a preventive agent for the erosion of tooth
enamel, specifically in deciduous teeth. Methods: This type of research is true experimental research.
The population of this research would be primary teeth extracted from children, using a purposive
sampling technique with inclusive and exclusive criteria. A total amount of 5 maxillary primary central
incisors were extracted and cleaned. APF gel was applied repetitively on the left side of the teeth for 4
minutes every hour, whereas the right side was left as it is. Samples were then analyzed using a scanning
electron microscope (SEM). A qualitative and subjective analysis regarding the micromorphological
features of the erosion can be done. Result: The side of teeth without APF gel application has a greater
erosion rate compared with teeth with APF gel application. The tooth which is demineralized shows a
honeycomb structure of the interprismatic enamel. As for the dentinal tubules, teeth without APF gel
application have a bigger opening of dentinal tubules, going up to 7.868 micrometers in size compared to
teeth with APF gel application (1-2 micrometers). Conclusion: The application of professional acidulated
phosphate fluoride (APF) gel on deciduous teeth even when soaked in Citrus aurantifolia, is proven to be
effective in preventing dental erosion.