The study looked at kids' saliva and found that the natural antimicrobial peptides like LL‑37 and HNP1‑3 might help protect against cavities, but the overall differences weren’t strong enough to change everyday habits yet.

Dental caries is a common oral disease that still needs to be thoroughly evaluated for understanding the pathophysiology. Hence, in our study, we evaluate the physicochemical and the peptide properties of the saliva and their role in dental caries among children. We conducted an observational <i>in vitro</i> study among 100 subjects of age 5-15 years. Decayed, missing, and filled surface (DMFT)/dmft was used to calculate the caries activity. The unstimulated saliva was evaluated for the peptides "LL-37, human neutrophil peptide (HNP) 1-3, and human beta-defensin-3" by ELIZA and for the "pH, buffer, and flow rate" of the saliva. The data thus obtained were analyzed to correlate caries and the salivary physiochemical and peptides using the "linear regression analysis." <i>P</i> &lt; 0.05 was deliberated as significant. Although no statistically significant variation was seen between low and high caries risk groups and the salivary parameters in our study, we observed a negative correlation of the salivary peptides and caries. For the salivary peptide "HNP1-3," there was a statistically significant variation. The salivary peptides may be carioprotective. However, further research has to be done to establish the mechanism of the action of these substances against caries.