Which statement is true regarding dental decay?

The statement that vigorous mastication increases plaque pH and reduces decay is accurate because chewing food stimulates saliva production, which plays a crucial role in maintaining oral health. Saliva contains bicarbonate, which helps to neutralize acids produced by bacteria in plaque, thereby raising the pH level in the mouth. A higher pH environment is less conducive to the demineralization of tooth enamel, thus reducing the risk of dental decay.

Furthermore, vigorous mastication can increase blood flow to the gums and enhance the overall oral environment, promoting a healthier balance of oral microbiota. This not only aids in the mechanical removal of food particles and plaque but also helps to maintain a neutral pH, further contributing to the prevention of decay.