Objective: To evaluate the prevalence of oral mucosal lesions of Thai elderly dental patients and to determine its association with age, gender, medical conditions, oral habits, and denture wearing.

Materials and Methods: Two hundred eleven patients who were 60-years-old or older and attended Dental Hospital, Naresuan University, Thailand participated in the present study. The prevalence of oral mucosal lesions as well as the medico-demographic data were collected. Intraoral examination and diagnosis were done according to the World Health Organization Guideline. The association and the correlation between variables were analyzed using Pearson’s Chi-square test.

Results: The overall prevalence of oral mucosal lesions was 61.6%. There was no statistically significant difference between age groups, genders, medical conditions, smoking, alcoholic beverage consumption, areca nut chewing, and denture wearing. The three most common lesions were traumatic ulcer (12.8%), frictional keratosis (10.9%), and melanotic macule (9.5%).

Conclusion: Thai elderly dental patient group in Thailand has slightly high prevalence of oral mucosal lesions. Age, gender, medical conditions, oral habits, and denture wearing are not associated with overall prevalence, but specifically associated with some individual lesions.

Keywords: Oral mucosal lesions, Elderly, Thailand, Oral habit, Denture