Final answer:
The substance in saliva that protects teeth from decay is likely basic, as it includes bicarbonate ions that neutralize harmful acids produced by bacteria metabolizing sugars. Furthermore, fluoride present in saliva and dental products strengthens teeth against acid attacks and supports enamel health. Therefore, the correct option is B.
Step-by-step explanation:
The substance in saliva that helps to protect the teeth against tooth decay is most likely basic. Saliva often contains bicarbonate ions, which can neutralize the acids produced by bacteria in the biofilm or plaque on the teeth. These bacteria metabolize sugars, leading to acid production that can erode tooth enamel. By neutralizing these acids, saliva helps to prevent demineralization and supports the remineralization process of the enamel. Furthermore, saliva also plays important roles in digestion, maintaining dental health by cleaning the teeth, and even contains antibodies that help protect against infection.
The presence of fluoride in saliva and dental care products such as toothpaste and mouthwash can further support dental health. Fluoride treatment and ingesting fluoridated water are effective in strengthening the minerals in teeth, thereby making them more resistant to acid attack and reducing the incidence of dental caries. Chewing sugar-free gum, like Orbit, stimulates the production of saliva, which not only washes away food particles but also provides this beneficial basic environment to protect against tooth decay.