lecture 30

Question 1

What is Hydroxyapatite Ca10(PO4)6(OH)2?

Answer 1

Enamel utilizes calcium and phosphate to create this. It is structured, crystalline, and present in teeth and bones
o Hexagonal symmetry and gives rigidity to bones and teeth. Lies on top of collagen fibers in bones and teeth
o Will become soluble when exposed to acidic environments ph 5.5. Enamel will begin to dissolve and more calcium and phosphate leave the tooth surface than enter it. Dentin more vulnerable

Question 2

Why is fluoride great?

Answer 2

• Fluoride alters the structure of the developing enamel, making it more resistant to acid attack.
• It encourages remineralization to be improved crystals.
• it affects the depth of the fissures on the biting surfaces of the teeth
• it reduces the ability of the plaque bacteria to produce acid.

Question 3

What is xylitol? Whats its function?

Answer 3

-xylitol is a natural sweetner derived from fibrous parts of plants. it does not break down like sugars and maintain a neutral PH in the mouth. Xylitol also prevents bacteria from sticking to the teeth

Question 4

Sorbitol is?

Answer 4

A slow metabolizing sugar alcohol derived from fruits, corn and seaweed. Unlike xylitol, cariogenic bacterica can ferment sorbitol, although they slowly do it, it still promotes their growth unlike xylitol.