ORIGINAL RESEARCH article
Front. Oral Health
Sec. Oral Epidemiology
Volume 6 - 2025 | doi: 10.3389/froh.2025.1675274
Determinants of Dental Caries Among Primary Schoolchildren in a Mountainous Region of Northern Vietnam
Provisionally accepted- 1Faculty of Public Health, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam
- 2Lao Cai Province General Hospital No. 4, Lao Cai, Vietnam
- 3Vinh Loc Medical Center, Thanh Hoa, Vietnam
- 4Department of Pediatrics, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam, Thai Nguyen, Vietnam
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Background: Tooth decay remains one of the most prevalent chronic conditions affecting children globally, especially in underserved populations. Despite growing international attention, limited data exist on the oral health status of children in remote regions of Vietnam. Objective: To assess factors associated with dental caries among primary schoolchildren in the mountainous province of northern Vietnam. Methods: A cross-sectional study was conducted from April 2024 to April 2025 among 545 children enrolled in four primary schools in Sa Pa, Lao Cai Province. Clinical dental examinations were performed using the International Caries Detection and Assessment System (ICDAS). Data on oral health behaviors and sociodemographic characteristics were collected via structured interviews. Descriptive statistics summarized the prevalence of caries and oral hygiene practices. Associations were analyzed using stepwise logistic and linear regression models. Results: The overall prevalence of dental caries was 91.4%, with 57.4% of children affected in permanent teeth and 82.2% in primary teeth. The mean DMFT and dmft scores were 1.31 and 5.38, respectively. Older age increased the risk of permanent caries but reduced primary caries and dmft scores. Significant disparities were observed by ethnicity, with Tay children showing higher odds of primary caries and Hmong children lower dmft scores compared to Dao peers. Children of non-farmer parents, particularly workers, had lower dmft scores than those of farmers. Frequent candy/snack and soda consumption were linked to higher primary caries, while poor brushing habits and symptomatic-only dental visits were associated with worse caries indices. Conclusions: Children in remote mountainous areas of Vietnam bear an alarmingly high burden of untreated tooth decay, particularly in primary teeth. Sociodemographic factors and inadequate oral health practices significantly contribute to this burden. Tailored, school-based preventive interventions, improved parental education, and enhanced access to dental care are urgently needed to address disparities and improve children's oral health outcomes in these regions.
Keywords: Dental Caries, Children, Vietnam, DMFT, Oral health behavior, Mountainous region, School-based intervention
Received: 31 Jul 2025; Accepted: 16 Sep 2025.
Copyright: © 2025 Le Thi Thanh, Pham Xuan, Hoang Thi, Truong Thi and Le Thi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Hoa Le Thi Thanh, ngothitam.tlu@gmail.com
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