Actinic cheilitis (AC) is derived from the Greek word “cheilos,” meaning lips. AC is a chronic, premalignant condition resulting from frequent and prolonged exposure to sunlight, wherein the lower lip is most affected due to direct sunlight exposure. The AC incidence is higher among Caucasian men than other ethnicities. It is estimated that 17% of all AC cases can progress to carcinomas, and 95% of cancerous lips are attributed to this lesion. Therefore, AC is significant in Brazil, a tropical country that sustains its economy through activities where workers are continuously exposed to solar radiation. Our literature review identified a need for training dentists for AC diagnosis and prevention, mainly of professionals working in the basic public health services in Brazil, through investments in continued education. AC can be simply avoided; however, dentists must have adequate knowledge to prevent its occurrence and progression. This study verified the importance of AC diagnosis — clinically or by biopsy (obtained from hardened leukoplakic or ulcerated areas). Investing in continued education of professionals and information for patients (to use lip balms) is of fundamental importance for AC prevention and early diagnosis.
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