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Oral Cavity pH Buffer System

Molecular classification: Buffer System, Physiological System

Overview

The oral cavity pH buffer system is a collective term referring to the mechanisms and molecular components in saliva that maintain a stable pH in the mouth. Key components include the carbonic acid/bicarbonate, phosphate, and protein buffer systems. This buffering action is crucial for protecting teeth and mucosal surfaces from acid-induced damage, supporting remineralization, and inhibiting dental caries development. Saliva flow rate influences the dominant buffer system, with the phosphate system being more active at rest and the bicarbonate system dominating during stimulated flow.

Biological functions

pH regulationAcid neutralizationMaintenance of oral homeostasisTooth enamel protectionSupport of remineralization

Disease associations

Dental caries (protective)Erosion (protective)

Biomarkers

Salivary pHSalivary buffering capacity

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