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This study aims at providing basic materials to develop an effective plan for Dental health education,for this purpose, we surveyed and examined daily tooth-brushing habits and methods and its plaqueremoval-accuracy and effectiveness using the Plaque Index for 110 dental hygiene students of A collegeselected among dental hygiene students who are growing as leading experts for oral heath education.The results are as following.1. As the answer of a question about whether or not using rotating method in brushing their teeth, therewasn’t big difference between the answers but ‘yes’53.6% was little higher than ‘no’46.4%.2. As the answer of a question about the reason why one does not use the rotating method, ‘becauseone cannot easily change its habits’62.7% was highest then ‘because it is difficult to do’27.5% and‘because it takes too much time’9.8% were followed.3. As a result of surveying the reason why one does not use the rotating method according to the periodwhen the subjects learned the method, overall, ‘because one cannot easily change its habits’62.7%was highest, ‘because it is difficult to do’27.5% and ‘because it takes too much time’9.8% werefollowed, while in case that it was at the elementary school period when one was taught, ‘because itis difficult to do’54.5 was highest, showing a meaning different(p＜.05).4. As a result of reviewing differency of the total score of decreasing level by each removal level of thePlaque Index according to whether or not using the rotating method, overall irrespective of whetheror not using the rotating method, the Plaque Index was found to be removed, and in case of usingthe rotating method, 15.29 points were decreased, while in case of not using it, 14.32 points weredecreased, so we could know that using the rotating method was more effective.5. As a result of examining removal level of the Plaque Index according to whether or not using therotating method, when one would use the rotating method in the upper-cheek, front-tongue rear-tongue except the lower cheek, ones who did not use the rotation method decreased in the PlaqueIndex, but the difference was not meaningfully large.