- Bicarbonate: Bicarbonate ions (HCO3-) are the most important ions in regulating the pH of saliva. Bicarbonate ions act as a buffer, which means that they can donate or accept protons (H+) to maintain a constant pH. When the pH of saliva decreases (becomes more acidic), bicarbonate ions donate protons to help increase the pH. Conversely, when the pH of saliva increases (becomes more basic), bicarbonate ions accept protons to help decrease the pH.
- Sodium: Sodium ions (Na+) also play a role in regulating the pH of saliva. Sodium ions help to maintain the ionic strength of saliva, which is important for the proper functioning of the salivary glands and the oral microbiome. Sodium ions also help to regulate the concentration of bicarbonate ions in saliva.
- Potassium: Potassium ions (K+) are also involved in regulating the pH of saliva. Potassium ions help to maintain the electrical potential of the salivary glands and the oral mucosa. Potassium ions also help to regulate the concentration of bicarbonate ions in saliva.
- Calcium: Calcium ions (Ca2+) play a role in regulating the pH of saliva by helping to maintain the structure of the salivary glands and the oral mucosa. Calcium ions also help to regulate the concentration of bicarbonate ions in saliva.
- Phosphate: Phosphate ions (PO43-) also play a role in regulating the pH of saliva by helping to maintain the structure of the salivary glands and the oral mucosa. Phosphate ions also help to regulate the concentration of bicarbonate ions in saliva.
