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Changes in oral hygiene status and management awareness among dental hygiene students following visual-feedbackbased oral hygiene education

  • Journal of Korean society of Dental Hygiene
  • Abbr : J Korean Soc Dent Hyg
  • 2026, 26(3), pp.329~337
  • DOI : 10.13065/jksdh.2026.26.3.6
  • Publisher : Korean Society of Dental Hygiene
  • Research Area : Medicine and Pharmacy > Dentistry
  • Received : March 16, 2026
  • Accepted : May 7, 2026
  • Published : June 30, 2026

Ji-Na Lim 1,  Jae-Young Lee 1,  Se-Rim Jo ORD ID 2

1단국대학교 보건과학대학 치위생학과/(주)토마스톤
2전주기전대학 치위생과

Accredited

ABSTRACT

Objectives: To evaluate changes in oral hygiene status and awareness among dental hygiene students following visual-feedback-based oral hygiene education using a natural blue plaque-disclosing agent. Methods: A single-group pre–post intervention design was used, and 44 dental hygiene students were included in the final analysis. Oral hygiene status was assessed using the O’Leary Plaque Index and the Tongue Coating Index, pre- and immediately post-intervention. Oral hygiene awareness and attitudes were measured using structured questionnaires. Data were analyzed using paired t-tests and Pearson’s correlation analysis. No covariates were controlled due to the study design. Results: Post-intervention, the O’Leary Plaque Index decreased from 47.79±22.84% to 39.93±20.89% (mean difference: −7.86, 95% confidence interval [CI]: −11.69 to −4.03, p<0.001), and the Tongue Coating Index decreased from 7.27±2.06 to 5.50±2.27 (mean difference: −1.77, 95% CI: −2.28 to −1.26, p<0.001). Oral hygiene awareness and attitude scores increased significantly across all items (p<0.05). However, there was no significant correlation between changes in awareness and reductions in the O’Leary Index (r=−0.152, p=0.326). Conclusions: Visual-feedback-based oral hygiene education using a natural blue plaque-disclosing agent was associated with improvements in oral hygiene status and awareness. However, causal interpretation is limited due to the single-group pre–post study design, and further controlled studies are required.

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