investigating the correlation of glycosylated hemoglobin a1c with oral streptococcus mutans count in patients with type 2 diabetes

Introduction: the leading cause of tooth decay is streptococcus mutans bacteria. diabetes is also a condition that can impact the mouth’s microbiology and the composition of saliva. the studies on the relationship between these two variables are limited; therefore, the present study was conducted to investigate the correlation between glycosylated hemoglobin a1c and the count of mutans streptococci in the mouths of patients with type 2 diabetes. materials and methods: the present study was a cross-sectional analytical study conducted in the specialized diabetes clinic of hamadan university of medical sciences, iran. sixty people with type 2 diabetes, non-smokers, who were willing to participate in the study to check the count of streptococcus mutants, had samples collected from three different locations. hemoglobin a1c and other relevant information were also extracted from the patients’ files, and the data were analyzed using spss 24. results: there were significant differences in streptococcus mutans counts among the dorsal surface of the tongue, the gingival groove and the mandibular buccal vestibule (p=0.001), the buccal vestibule and the dorsal surface of the tongue (r=0.337, p=0.008) and the buccal vestibule of the lower jaw and the gingival groove (r=0.361, p=0.004). no significant relationship was observed between the number of streptococcus mutans bacteria on the dorsal surface of the tongue and the gingival groove (r=-0.197, p=0.137).conclusion: according to the findings of this study, although hba1c is associated with poor control of diabetes mellitus, there was no significant correlation between streptococcus mutans counts and hba1c levels. furthermore, it can be concluded that streptococcus mutans counts are closely related to specific areas within the oral cavity.