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This study investigated the cellular changes in the mouth of smokeless tobacco (shamma) users among Saudi citizens from the Najran region.    METHODS  Healthy 61 shamma users and healthy 61 non-users participated in this study after informed consent. A mouth swap was taken from each study subject and investigated for cellular changes using a Papanicolaou stain. The results were analyzed using the t-test per cent of the StatPac statistical program.    RESULTS  Keratinization, binucleation and combined results were associated with shamma use. The number of shamma users with abnormal histology was 14 (22.9%) (p≤0.0001). The shamma types associated with the abnormal cytology were: Suhaily (9/36; p=0.0014), black (2/9; p=0.08), white (2/6; p=0.41), and red (1/1; p=1.00). The percentage of the tissues with abnormal histology decreased with the increase in the duration and frequency of smokeless tobacco use, except for the white shamma which increased with the increase in the frequency.    CONCLUSIONS  Shamma use affected the mouth epithelial cytology of 22.9% of its users. The histological changes were inflammation, keratinization, binucleation, and atypia. The Suhaily smokeless tobacco was associated with the highest percentage of the abnormal cytology results, while the duration and frequency of smokeless tobacco use decreased the number of tissues with abnormal histology.

Cytological changes in oral mucosa induced by smokeless tobacco