Impact of school-based oral health education on vietnamese adolescents: A 6-month study

Vy Thi Nhat Nguyen, Takashi Zaitsu, Akiko Oshiro, Tai Tan Tran, Yen Hoang Thi Nguyen, Yoko Kawaguchi, Jun Aida

Research output: Contribution to journalArticlepeer-review


We have evaluated the impact of a school-based intervention on oral health knowledge, behaviours, and oral health status of adolescents in Vietnam. This 6-month study included 462 adolescents aged 12 years from four selected schools in Hue City, Vietnam. The intervention group received a 15-min lecture by a dentist and hands-on session on mouth observation and toothbrush-ing skills. The control group did not engage in any educational activities during the follow-up pe-riod. Data were collected at baseline and 6 months through a survey questionnaire and clinical ex-amination. The Debris Index was used for dental plaque; the Papillary, Marginal, Attached gingiva index for gingivitis; and the Decayed, Missing, and Filled Teeth index (World Health Organization modification) for dental caries. Difference-in-difference analysis was used to compare changes between the groups. After 6 months, the control tended to show decreased toothbrushing frequency and increased dental plaque accumulation. The participants in the intervention group showed improved oral health knowledge (p <0.01), behavior (p < 0.05), and hygiene (p < 0.001) compared to the control group. However, the intervention did not improve dental caries and gingivitis. A single school-based oral health education program can help adolescents improve oral health knowledge and prevent the deterioration of short-term oral health behavior and hygiene.

Original languageEnglish
Article number2715
Pages (from-to)1-12
Number of pages12
JournalInternational journal of environmental research and public health
Issue number5
Publication statusPublished - 2021 Mar 1
Externally publishedYes


  • Adolescent
  • Health education
  • Oral hygiene
  • Secondary schools
  • Vietnam

ASJC Scopus subject areas

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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