Objective: To assess whether a public educational program can increaseknowledge and attitude related to oral health, as well as self carebehavior among remote rural area people in Thailand. Methods: Aninterviewed questionnaire was used to measure attitude, knowledge, andself-care practice at pre- and post-intervention among people living inBan Nayao Village, Sanamchaiket District, Chachengsao Province. Twohouseholds from each 34 blocks were selected in a systematic manner. The program used community radio broadcasting as the main educationalmedia and posters as supplements. One out of 57 messages, each 2-4minutes long, was broadcast at the beginning of each hour from8.00-19.00. Fifty posters were placed in the community gathering areassuch as market, shops, and restaurants. The posters were replaced withnew ones after two months in display. Results: The pre-interventionassessment showed that 71.1% of 154 persons, age 16 ? 89 years old,listened to this radio frequency regularly. At four months, 133 personswere available for the evaluation. Among these persons, 81.7% hadincrease knowledge score, and the mean score increased significantlyfrom 8.6±3.7 to 10.8±4.2 (p = 0.000). For attitude toward self-care,there was no significant change in belief in own ability to preventfurther dental caries and tooth lose. For self-care behavior, thepercentage of dentate persons brushing before bedtime increasedsignificantly from 70.0% to 76.8% (p = 0.000). Among four denturewearers, one wore them at night and brushed them in the mouth atpre-intervention and still did the same at post-intervention. Threebrushed dentures with water at pre-intervention, but one of these threebrushed them with toothpaste at post-intervention. Conclusion: Thepublic educational program showed initial increases in dental knowledgebut not attitude for self-care. Self-care practice improved amongdentate persons but not among denture wearers.