Bacteria can live in your mouth in the form of plaque, causing cavities and gingivitis, which can lead to periodontal (gum) disease. In order to keep your mouth clean, you must practice good oral hygiene every day.

Developing countries face a growing toll of tooth decay and gum disease that can be prevented. Apiradee Treerutkuarkul and Karl Gruber report.

Severe periodontal (gum) disease, which may result in tooth loss, was estimated to be the 11th most prevalent disease globally.