Comparative evaluation of antimicrobial efficacy of fluoride-based and self-assembling peptide P 11 -4-based tooth remineralization agents on Streptococcus mutans: A microbiological study

Abstract

Background: Dental caries is a biofilm-related oral disease that continues to afflict the majority of the world's population. The disease results from an interaction between specific bacteria and dietary constituents within a biofilm known as dental plaque. Among the cariogenic microorganisms, Streptococcus mutans (S. mutans) plays pivotal role in caries-inducing processes. Objectives: Evaluate and compare the antimicrobial efficacy of self-assembling peptide P 11 -4-based tooth remineralization agents on S. mutans. Materials and Methods: An in vitro microbiological study. The antibacterial efficacy of self-assembling peptide P 11 -4 gel (Group 1), fluoride enhanced hydroxyapatite gel (Group 2), acidulated phosphate fluoride gel (Group 3), chlorhexidine gluconate gel 1.0% w/w (Group 4; positive control), and normal saline (Group 5; negative control) was performed using time-kill assay over a period of 24 h and the number of S. mutans colony-forming units (CFUs) were calculated. Statistical Analysis: Statistical analysis was done using Kruskal-Wallis test and Mann-Whitney post hoc Test. The level of significance was set at P < 0.05. Results: Group 1 showed mean CFUs (× 10 3) of 841.33 ± 3.51, Group 2 showed 10035.33 ± 60.68, Group 3 showed 1058.00 ± 56.96, Group 4 showed 0.00 ± 0.00, and Group 5 showed mean CFUs with 15226.67 ± 96.67. The difference in the mean CFUs (× 10 3) between different groups was statistically significant at P < 0.001. Conclusion: The self-assembling peptide P 11 -4-based tooth remineralization agent exhibited an inhibitory influence on S. mutans and hence formation of cariogenic bacteria dominant biofilm can thus be affected by its application.