Unmet dental care needs in South Korea: how do they differ by insurance system?

This study aimed to analyse and compare the influence of National Health Insurance and Medical Aid coverage on the persistency of unmet dental care needs in South Korea. This study was based on a longitudinal sample of 4461 adults aged 19 years and older who participated in the South Korea Health Panel from 2011 to 2014, using weights to make the data nationally representative. Propensity score matching was used to adjust the demographic, socioeconomic and health status information of National Health Insurance and Medical Aid groups. Panel logistic regression analyses were conducted to examine the association between health insurance type and unmet dental needs for three consecutive years. The odds of the lowest income group reporting unmet dental care needs compared with the highest income group was 6.75 (confidence interval 5.94？7.67), which reduced to 4.19 (confidence interval 3.76？4.67) in the models including health insurance schemes. Additionally, Medical Aid recipients (odds ratio 2.49; 95% confidence interval 2.18？2.48) were more likely to have unmet needs than those covered by National Health Insurance. The dental care needs of Medical Aid beneficiaries were not being met, unlike those of the National Health Insurance beneficiaries. Such evidence suggests that increasing health insurance coverage to include several essential dental services would improve the accessibility of dental care services for Medical Aid beneficiaries