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Nithimar Sermsuti-Anuwat,1 Tanit Arunratanothai,1 Itt Assoratgoon,1 Khunnakrit Ratchatasupak,1 Ronlada Porntirit,2 Daophon Ardiam,3 Apisit Chonkasem3 1Academic Affairs Division, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand; 2Department of Occlusion, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand; 3Pak Kret Dental Project Division, Faculty of Dentistry, Chulalongkorn University, Bangkok, ThailandCorrespondence: Nithimar Sermsuti-Anuwat, Academic Affairs Division, Faculty of Dentistry, Chulalongkorn University, 34 Thanon Henri Dunant, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand, Email Nithimar.s@chula.ac.thPurpose: To examine the association between sugary snack and drink consumption frequency and tooth retention among residents with disabilities living in Thai foster homes.Patients and Methods: We employed a cross-sectional design using secondary data from a World Health Organization (WHO)-based oral health survey conducted in October 2025 across two government-run foster homes in Thailand (parent survey n = 301). The analytic sample included 247 residents aged 13– 59 years with permanent dentition and complete tooth-level records. Remaining teeth were calculated using a 28-tooth definition (excluding third molars) and classified into three ordinal groups. High-frequency sugary snack/drink intake (> 1 time/day vs. ≤ 1 time/day) was measured via interviewer-administered questionnaire, and tooth-retention category was modeled using ordinal logistic regression.Results: High-frequency sugary snack/drink consumption was reported by 88.7% of residents. After adjustment, this exposure was not associated with tooth-retention category (adjusted odds ratio [aOR] 0.83; 95% confidence interval [CI] 0.26– 2.62). However, age was strongly associated with lower retention (aOR 0.90 per year; 95% CI 0.87– 0.92), and partial caregiver assistance was independently associated with reduced retention (aOR 0.47; 95% CI 0.24– 0.92).Conclusion: In this cross-sectional study of residents with disabilities in Thai foster homes, high-frequency sugary snack/drink consumption was not independently associated with tooth-retention category after adjustment. Age and partial caregiver assistance were associated with lower tooth retention, indicating a need to strengthen routine preventive support for residents with greater functional dependency alongside facility-level strategies to limit free-sugar exposure.Keywords: dietary sugars, disabled persons, foster home care, health equity, tooth loss