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3; 0.001), complementary insurance coverage (OR = 1.3; 0.001), family size (OR = 1.46; 0.001), and income (OR = 1.3; 0.001). Dental expenditures were progressive in Iran, and the rich have paid more share for these services. It seems that implementing insurance programs, changes in the financing of dental care, development of insurance basic benefits package, supporting programs for the poor, adopting educational policies, and promoting oral health for vulnerable people can have an effective role in decreasing ineq