Tooth decay and gum diseases are caused in the main by plaque.

Tooth decay and gum diseases are caused in the main by plaque, a sticky combination of bacteria and food. The plaque starts to accumulate in the teeth for 20 minutes after eating, and if the plate is not completely removed each day, will be formed tooth decay. Over time, plaque will harden to form tartar.
The plaque and tartar lead to this many problems, namely:
     * Dental caries: holes that damage the structure of the tooth.
     * Gingivitis: inflammation, swelling and bleeding of the gums.
     * Periodontitis: destruction of the ligaments and bone that support the tooth, often leading to the loss of it.
     * Bad breath (halitosis)
     * Abscesses, pain and inability to use teeth
     * A variety of problems outside the mouth, from premature births to heart disease.