Saliva provides for the hydration, lubrication, and cleansing of oral tissues. It has antimicrobial functions. It promotes tissue repair. It maintains a normal oral pH, prevents demineralization, and enhances remineralization. It plays a critical role in intermediary metabolism, bolus formation, and swallowing. It has a salutary effect on taste and speech. These functions of saliva and its great potential as a diagnostic fluid mandates that oral healthcare providers have an understanding of the many roles saliva plays in health and disease.
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