Among young children in low-income families covered by Medicaid, we estimate by racial/ethnic group whether children who have mothers with a regular source of dental care (RSDC) at baseline have greater dental utilization in the following year than children with mothers without a regular source.

From a population of 108,151 children enrolled in Medicaid aged 3 to 6 and their low-income mothers in Washington state, a disproportionate stratified random sample of 11,305 children aged 3 to 6 was selected from enrollment records in four racial/ethnic groups: 3,791 Black; 2,806 Hispanic 1,902 White; and 2,806 other racial/ethnic groups. In a prospective cohort design, we conducted a baseline survey of mothers and for respondents, collected their children’s Medicaid dental claims in the 1-year follow-up period. Mutivariable regression models estimated the associations between the mothers having a RSDC at baseline and their children’s prospective dental utilization.

About 38% of mothers had a RSDC. Among children of Black and Hispanic mothers, having a mother with a RSDC at baseline was associated with greater odds of receiving any dental care in the following year (OR 1.69, 95% CI 1.10-2.62 for children of Black mothers; OR 1.84, CI 1.23-2.73 for children of Hispanic mothers). For children with dental utilization, children of Black or Hispanic mothers with a RSDC received 1.22 (CI 1.08-1.38) and 1.10 (CI 1.01-1.19) more preventive services, respectively. For children of White mothers, associations were in the same direction but not significant.

For young children of Black and Hispanic mothers, dental care utilization is higher when their mothers have a RSDC. For low-income young children with Medicaid, increasing the mothers’ access to dental care may increase the children’s utilization of dental and preventive services, which, in turn, may reduce racial/ethnic inequalities in oral health.