单项选择题

正确的口腔健康模式是    A．预防口腔疾病，保护牙齿    B．预防口腔疾病，防止口腔畸形    C．预防口腔疾病，护牙健齿，纠正口腔畸形    D．预防口腔疾病，护牙健齿，维护自身完好的牙合系统    E．预防口腔疾病，护牙健齿，维护自身完好的牙合系统，纠正口腔畸形

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