BACKGROUNackground and AimD & AIM:Tobacco products are the cheapest addictive substance available to the community, causing the deaths of six million people a year. In addict persons the amount of oral hygiene and regular referral to dentistry decreases sharply. Considering the fact that young people in many cases they hide cigarette smoking, in this study, we decided to evaluate the state of tobacco abuse status based on oral evidence in males high School Students.

Material & Methods: This descriptive-analytic study was done by cross-sectional method. Four hundred  shahrbaak male High School Students in 2019 enrolled to the study. The data gathering tool was a pre-prepared questionnaire consisting of two parts: the first part included demographic information and the second part surveied frequency of taking drug use over the past 12 months. Data were analyzed by SPSS 20, T-test ، Chi-Square and Fisher Exact tests. P-vaue less than 0.05 was considered statistically significant.

Results: The frequency of tobacco products abuse based on self- declaration of students was 32.2% and oral evidence was 23.2%. Oral evidence showed 9.5% of the subjects had lips pigmentation, 7.8% had dental color changes and 6% had both. Increasing the number of children, reducing the level of education of parents, having a history of smoking in the family and reducing the academic grade point average, increase the rate of tobacco products abuse in students based on oral evidence and self-declaration.