Abstract
In 2010, we analyzed the relationships among personal traits using the NEO‒FFI（Neuroticism Extraversion Openness Five‒Factor Inventory） and oral health examinations or oral health questionnaire responses with newly entered students of Kyushu Dental College. Among the students in Oral Health Sciences, the five character traits of Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness were all average. Among the students in the Dentistry Department, Openness in both male and female students was low, and in particular Neuroticism in the male students was low. Therefore, they seemed to have a conservative character, and particularly male students were an emotionally stable group. As for the relationships between personal traits and the oral health examination, there was no significant relationship found among the students in Oral Health Sciences, but among female students in the Dentistry Department, there was a positive relationship between the T score for Neuroticism and the number of intact teeth. Among male students in the Dentistry Department, there was a positive relationship between the T score for Agreeableness and the total number of teeth, and a negative relationship between the T score for Extraversion and the number of untreated teeth. Furthermore, the male students who were found to have a good score for mouth cleaning had higher T score for Extraversion than the male students who had poor results for mouth cleaning. As for the relationships between personal traits and oral health questionnaire responses, the more often the toothpaste was used per day, the greater the T score for Openness decreased among Oral Health Sciences students and the T score for Conscientiousness increased among male students in the Dentistry Department. In addition, among Oral Health Sciences students, the T score for Agreeableness among the students who had not received tooth‒brushing instruction or were not worried about tooth appearance was higher than that among students who had received such instruction or were worried about tooth appearance. Thus, we observed various relationships between personal traits and oral health examinations or oral health questionnaire responses. However, since the personal trait relevant to an item in the oral examination or oral health questionnaire varied according to the subject group, it is necessary to verify the reproducibility of these consequences by conducting similar examinations in 2011.
https://ror.org/03bwzch55 
