Materials & Methods: This analytical study was performed on 534 male subjects (262 non-smokers, 136 smokers and 136 heavy smokers) referred to the Oral disease Department of Babol Dental University. Inclusion criteria were absence of any history of systemic disease and not using up antibiotic, alcohol and coffee during the past month. Three study groups matched according to the mean of age, tea consumption and OHI-S. Presence of coated tongue and hairy tongue was observed. Data were analyzed using Spss13 and Anova and Kruskal-wallis test.
Results: Coated tongue was detected in 26(%9.9), 50(%36.8), 70(%51.5) of non-smokers, smokers and heavy smokers, respectively. This frequencies for hairy tongue were 1(%0.4), 5(%3.7), 32(%23.5). Coated and hairy tongue were detected significantly more in heavy smokers than smokers (P=0.01, P<0.0001) and significantly more in smokers than non-smokers(P<0.0001).
Conclusion: According to this study, the amount of cigarette consumption has a positive correlation with occurrence of coated and hairy tongue.