Which of the following is NOT a function of saliva?

Saliva plays several essential roles in maintaining oral health and facilitating various functions in the mouth. One of its primary functions is to moisten food, which aids in the formation of a food bolus for easier swallowing. Additionally, saliva contributes to the sense of taste by dissolving food particles that come into contact with taste buds, allowing for the perception of flavors. Saliva also contains bicarbonate and other components that help neutralize acids in the mouth, which is crucial for protecting tooth enamel and supporting digestion.

However, the idea that saliva eliminates the need for brushing teeth is misleading. While saliva has protective qualities and helps wash away food particles, it cannot replace the mechanical action of brushing, which is vital for removing plaque and preventing oral diseases such as cavities and periodontal disease. Regular brushing and good oral hygiene practices are necessary to ensure the health of the teeth and gums, making this option the correct choice for the function that is not supported by the properties of saliva.