test 2,Dental caries part 1

Question 1

What are dental caries?

Answer 1

destructive process that may take place on any tooth surface in the oral cavity where dental plaque is allowed to develope over time

Question 2

Dental caries

Answer 2

a word that denotes the carious process and the carious lesion ( no such word as dental carie)

Question 3

what 3 things must caries have to happen?

Answer 3

teeth, plaque, and bacteria ( and some time)

Question 4

whats the cure for caries?

Answer 4

full exodotia, removal of all teeth

Question 5

where does the dental caries process occur?

Answer 5

in the biofilm on the surface of the tooth. This is where the bacteria live.

Question 6

what are the 3 phases of biofilm development?

Answer 6

1. attachment 2. colonization 3. biofilm development

Question 7

the biofilm were concerned with is…

Answer 7

plaque, its always metabolically active and is a community of bacteria that work together

Question 8

bacteria in plaque work together and can drop the pH below 5 within……

Answer 8

1-3 minutes

Question 9

why is pH important?

Answer 9

repeated falls of pH causes tooth demineralization and the caries threshold is 5.5

Question 10

how can you cause remineralization in regards to pH?

Answer 10

raise the pH back up. ( ie baking soda mouthwash)

Question 11

can the metabolic activity of biofilm be prevented?

Answer 11

no, but disease progression can be controlled, arrested and the lesion can become inactive.

Question 12

can the metabolic activity of biofilm be prevented?

Answer 12

no, but disease progression can be controlled, arrested and the lesion can become inactive.

Question 13

when it boils down, what is the cause of dental caries?

Answer 13

plaque

Question 14

whats a pellicle?

Answer 14

acellular proteinaceous film derived from saliva. It protecs from abrasion and attrition, acts a diffusion barrier and is bacteria free

Question 15

after the pellicle is formed what happens?

Answer 15

within 0-4 hours bacteria colonize it by attaching fimbriae which invites other bacteria to join the party

Question 16

a large portion of these pioneer bacteria are..

Answer 16

streptococci,

only 2% are mutans streptococci which are associated with the carious process.

Question 17

after the streptococci invade the pellicle, what happens in the next 4-24 hours?

Answer 17

more bacteria attach and microcolonies form and form a extracellular slime layer which protects the bacteria.

Question 18

so what does the extracellular slime layer do?

Answer 18

anchors and protects the bacteria so they can go to work.

Question 19

what happens after this layer is produced?

Answer 19

the streptococcus dominated plaque changes to a plaque dominated by actinomyces

Question 20

whats microbial succession?

Answer 20

a population shift in the bacteria ( plaque goes from gram + aerobes to gram - anaerobes ( periodontal disease)

Question 21

whats microbial succession?

Answer 21

a population shift in the bacteria ( plaque goes from gram + aerobes to gram - anaerobes ( periodontal disease)

Question 22

carious causing bacteria have what 3 qualities?

Answer 22

1. acidogenic, convert sugar to acid
2. produce extra and intracellular polysaccharide
3. aciduric ( thrive in low pH)

Question 23

whats the specific-plaque hypothesis?

Answer 23

only certain organisms cause plaque and an immunization of the bad strands would cure this.

Question 24

whats the non-specific plaqeu hypothesis?

Answer 24

carious process includes overall activity of plaque. So if you brush your teeth you should be fine

Question 25

ecological plaque hypothesis

Answer 25

says demineralization will resulf from a shift in the balance of resident microflora driven by a change in the environment. Frequent sugar intake encourages the growth of acidogenic and aciduric species thus predisposing site to caries

Question 26

ecological plaque hypothesis

Answer 26

says demineralization will resulf from a shift in the balance of resident microflora driven by a change in the environment. Frequent sugar intake encourages the growth of acidogenic and aciduric species thus predisposing site to caries