Which elements in saliva protect against tooth decay? (Select all that apply.)
A)Salivary a-amylase
B)Ptyalin
C)Mucin
D)Exogenous fluoride
E)A pH of 7.4

Question

Quizplus · Accepted Answer

The bicarbonate concentration of saliva sustains a pH of approximately 7.4, which neutralizes bacterial acids and prevents tooth decay. Exogenous fluoride (e.g., fluoride in drinking water) is absorbed and then secreted in the saliva, providing additional protection against tooth decay. Salivary a-amylase, also known as ptyalin, initiates carbohydrate digestion in the mouth and stomach. Mucin provides lubrication in the saliva.

Which Elements in Saliva Protect Against Tooth Decay? (Select All