Abstract
The oral mucosa tissues and salivary glands act together to protect oral environment from pathogens and other irritants. Saliva is a mixture of water, electrolites, proteins (including immunoglobulins, mucins, lactoferrin, thrombospondin, proline-rich proteins, agglutinin) and enzymes (such as a-amilase, lysozyme, lipase and other proteolytic enzymes), the daily secreton normally ranges b…