Factors Associated with Dental Caries of Permanent First Molars among Thai Primary Schoolchildren

Septika Prismasari, Songchai Thitasomakul


Permanent first molars are the most vulnerable teeth to dental caries. This study aimed to assess the association among socio-economic, demographic, tooth brushing behaviors and dental caries of permanent first molars among primary schoolchildren. Cross-sectional data on demographic, socio-economic and tooth brushing behavior were assembled from 346 children-caretaker pairs using questionnaire. Caries status was clinically examined using modified criteria from WHO. Fixed effect random intercept logistic regression was used to estimate the magnitude independent association between variables and caries status based on variability within-subject. The prevalence of dental caries in permanent first molars was 43.6%, while the caries experience indexed as Decayed, Missing, and Filling Teeth (DMFT) was 1.00±1.36. Children who irregularly brushing at night, sharing tooth brush among family member and having deciduous caries were significantly more likely to have higher caries in the permanent first molars than those who did not. The prevalence of dental caries in permanent first molars was high in the early stage of eruption. 


dental caries, permanent first molars, primary schoolchildren, risk factors, brushing behavior


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Last updated: 13 February 2019