Hydroxyapatite in toothpaste for prevention and treatment of dental caries
Caries is caused by loss of mineral from the dental hard tissues (enamel, dentine, and root cementum) when exposed to acids. The acids are produced by bacteria during digestion of sugar. Initially the dental surface is demineralised and becomes porous and subsequently a cavity can be formed. Fluoride containing toothpaste is used to remineralise the dental hard tissue and to prevent lesion growth. Hydroxyapatite crystals have also been shown to remineralize enamel in laboratory studies.