Question

Tooth decay begins when the pH of the mouth drops below:

• A. 6.5
• B. 5.5
• C. 4.5
• D. 7.0

Hint:

pH<5.5 in the mouth can lead to tooth decay.

Answer 1

The Correct Option is B

Step 1: Recall the normal pH of the mouth.
The typical pH of a healthy mouth is around 6.5-7.0.
Step 2: Understand the demineralization of tooth enamel.
Tooth enamel starts to erode when the pH falls below a critical level.
Step 3: Identify the pH threshold for tooth decay.
Tooth decay begins when the pH of the mouth drops below 5.5.