INFLUENCE OF DRINKING AND EATING AFTER FLUORIDE APPLICATION ON SALIVARY FLUORIDE LEVEL

Abstract

This study aimed to investigate the effects of three different post‑varnish instructions following fluoride varnish treatment on salivary fluoride concentration at 40 minutes, 1 hour, 2 hours, and 4 hours along with cumulative fluoride exposure. The protocols were as follows: Instruction A (Standard), allowing water and soft food 5 minutes post-application; Instruction B (NPO-30 mins), restricting intake for 30 minutes; and Instruction C (Refrain 4h), restricting food for 4 hours. All participants were permitted to consume hard food after 4 hours. The data were analyzed from 23 participants with a mean age of 25.53 years, all of whom had normal oral health and no dental caries. The results showed that 1) Salivary fluoride concentrations were significantly influenced by time and post‑varnish instructions (p < 0.05), specifically resulting in lower concentrations for Group A at 2 and 4 hours compared to Groups B and C. and 2) Analysis of the area under the concentration-time curve revealed that the AUC of group A in the first 2 hours (AUC_0-2h) and 4 hours (AUC_0-4h) was significantly lower than that of groups B and C at a significance level of 0.05.

Keywords: Fluoride, Post Varnish Behavior, Fluoride Varnish