With reference from (Dentist in Eagen, Denmarkdental.com)  Public information: Teeth-plural vs Tooth-single.  Child-thumb sucking cause gap between teeth. First dental visit-first tooth appear in mouth/6 months old (check tooth, face and mouth for abnormalities), full set around 3 y/o.  Dental appointment-twice a year (check teeth hygiene, cavities, & gum disease)  The decay missing filled in teeth index (DMFT) used to measure dental conditions. Countries Denmark -Germany-Finland-Sweden are white & clean teeth in the world. Secret? Country provides free dental care under 18 & oral care education.  Plaques/tartar-Bacteria form &  cause cavities (decay teeth into tiny hole), gingivitis (inflammation gum), loss teeth, bleeding gum (show gum tissue not healthy).  The whitening (form of carbamide/hydrogen peroxide) need dentist care. Excessively can breakdown tooth enamel & sensitivity  Bruxism-grind/clenching of teeth can damage the teeth, show deficiency in magnesium a