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This study was conducted to evaluate the caries experience, saliva pH, salivary flow rate and tea consumption in smokers and non-smokers patients. The samples were composed of 60 subjects divided into two main groups 30 male for nonsmokers and other 30 male for smokers. They asked about smoking behaviors, the dietary habits including frequency of tea consumption per day and the quantity of the sugar intake, and oral health behaviors for both groups. The dental caries was assessed using DMFT index and the saliva pH and the salivary flow rate were measured. Student t-Test and correlation coefficient were used for statistical comparisons.

The results indicated that the DMFT and the salivary flow rate were decreased with exception that there was no significant difference between saliva pH between the smokers and non-smokers groups. In addition to the frequency of tea consumption was higher in smokers than in non-smokers and with increased frequency of tea consumption the DMFT decreased. The conclusion of this study indicated the long term use of the tobacco smoking affects the dental caries and the salivary flow rate but does not affect on the saliva pH. It is possible to increase the frequency of tea consumption but with less amount or free from sugar.