The Effect of Oral Sprays on Salivary pH

This will be a cross‐over clinical trial assessing the effect of oral foams containing zink hydroxiapatite and probiotics (Lactobacillus, Bifidobacterium), Olaflur (amino fluoride), and oral spray with alkaline thermal water. The study will be conducted in six visits over a period of 1.5 months. After enrolment, dental examination will be performed using the following indices: DMFT, OHI‐S index, Bleeding index. Saliva buffer capacity, salivary flow rate, and baseline salivary pH will be measured. Salivary pH changes will be registered after consumption of Coca‐cola alone or followed by each of the tested products application.