Objective To explore the level of students’ understanding of oral health knowledge

so as to guide the clinic work. Method 500 copies of students’ questionnaire concerning bacterial plaque

dental calculus

periodontal disease

oral health through random sampling are analyzed. Results Only less 20% of students can correctly understand the periodontal disease.Conclusion This research has revealed the correlation between lacking of oral health and the incidence of developing periodontal disease

and concludes that lacking of oral health protection is the main cause of this disease and improving the education of oral knowledge is the effective method to reduce the incidence of periodontal disease.