The oral hygiene standard formulated by the World Health Organization 198 1 year is

Teeth are clean, no cavities, no pain, normal gum color and no bleeding. The oral hygiene standards formulated by the World Health Organization in 198 1 originated from the query on oral preventive medicine of dental practitioners. The options for this topic are: clean teeth, no cavities, no pain, normal gum color and no bleeding. According to the knowledge of oral preventive medicine, the correct answer to this question is that the teeth are clean, there is no tooth decay, no pain, the gum color is normal, and there is no bleeding.