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Updated: Jul 1, 2026

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Published on: November 7, 2020

Toothbrushing behavior changes among korean students pre- and post-COVID-19: lessons and policy implications.

Ji-Young Son¹, Dong-Hun Han^2,3

¹Department of Dental Hygiene, College of Bioecological Health, Shinhan University, Uijeongbu, Korea.

BMC Oral Health

|June 29, 2026

Summary

The COVID-19 pandemic disrupted children's toothbrushing habits in South Korea, reducing post-lunch brushing but increasing bedtime brushing. This highlights the need for flexible school oral health programs during crises.

Keywords:

Covid-19 Health Behavior Oral Health School Health Services Toothbrushing

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Last Updated: Jul 1, 2026

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Nasal Brushing Sampling and Processing Using Digital High Speed Ciliary Videomicroscopy – Adaptation for the COVID-19 Pandemic

Published on: November 7, 2020

Area of Science:

Public Health
Pediatric Dentistry
Epidemiology

Background:

South Korea's School Oral Health Room Program, established in 1999, aimed to improve children's oral hygiene.
The COVID-19 pandemic significantly disrupted established children's oral hygiene practices.
Understanding these disruptions is crucial for maintaining oral health interventions.

Purpose of the Study:

To investigate the impact of the COVID-19 pandemic on toothbrushing practices among South Korean children aged 4-15.
To compare brushing behaviors before, during, and after the pandemic.
To inform future public health strategies for pediatric oral hygiene.

Main Methods:

Analysis of cross-sectional data from the Korean National Health and Nutrition Examination Survey (KNHANES VIII-IX, 2018-2023).
Inclusion of 5,251 children aged 4-15 years.
Assessment of toothbrushing behaviors across three periods: pre-pandemic (2018-2019), during pandemic (2020-2021), and post-pandemic (2022-2023), using statistical analyses.

Main Results:

A marked decline in post-lunch toothbrushing was observed across all age groups during and after the pandemic.
Toothbrushing before bedtime increased post-pandemic, especially in older children (10-12 years).
Post-breakfast brushing declined during the pandemic with partial recovery, while other brushing times showed varied trends.

Conclusions:

The COVID-19 pandemic significantly altered children's toothbrushing routines, notably reducing post-lunch brushing and increasing bedtime brushing.
These findings emphasize the vulnerability of school-based oral health programs during public health crises.
Adaptable and resilient oral health strategies are essential to ensure sustained effectiveness.