caries

Question 1

what does DMFT stand for?

Answer 1

decayed, missing, filled teeth

Question 2

what are some problems with the DMFT index?

Answer 2

• not all teeth that are missing are missing due to caries.

- it is irreversible so not good for measuring beneficial interventions

Question 3

what is def

Answer 3

a count of all primary teeth that are decayed, extracted due to caries or filled

Question 4

what is dmfs?

Answer 4

a count of all decayed, missing, or filled tooth surfaces

Question 5

what are the two aproaches to caries risk assesment?

Answer 5

1) population based approach

2) individual

Question 6

what are the ‘big 4’ to chairside prevention?

Answer 6

• brushing advice
• diet advice
• topical flourides
• fissure sealants

Question 7

what is the critical pH?

Answer 7

5.5

Question 8

what are the two different kinds of sweeteners?

Answer 8

• nutritive sweeteners

- intense (non-nutritive)

Question 9

give some examples of nutritive sweeteners?

Answer 9

sorbitol, mannitol, xylitol

Question 10

give some examples of intense sweeteners?

Answer 10

saccharine, aspartame, acesulfame-k

Question 11

what are the 4 zones of enamel caries?

Answer 11

1. translucent zone
2. dark zone
3. body of lesion
4. surface zone

Question 12

what are the 3 zones of established dentine caries?

Answer 12

1. advancing front
2. zone of bacterial penetration
3. zone of destruction

Question 13

where is known as typical stagnation areas?

Answer 13

• gingival recession (root caries)
• adjacent to partial dentures
• adjacent to restorations

Question 14

what is meant by acidogenic?

Answer 14

transports sugars in diet and convert to acid (lactic acid)

Question 15

what is meant by aciduric?

Answer 15

thrive at low pH

Question 16

what are the three theories to cariogenic plaque?

Answer 16

• specific plaque hypothesis
• non-specific plaque hypothesis
• ecological plaque hypotheses

Question 17

what are the 2 layers of dentine caries?

Answer 17

• outer zone(infected zone)

- inner zone(affected zone)

Question 18

what is a stepwise excavation?

Answer 18

first visit- remove only superficial layer of infected necrotic dentine and ensure all peripheral caries is removed. Placed with calcium hydroxide lining and GI placed over.

• left for 6-12 months
• re-clean cavity and restore

Question 19

caries is present if what 4 things interact

Answer 19

• teeth
• plaque bacteria
• sugar
• time

Question 20

what are some common disclosing agents?

Answer 20

• bismark brown
• basic fuschin
• fast green
• flourescin
• erythrosin(most common)

Question 21

what are some methods of plaque control?

Answer 21

• antibiotics( distrupt the oral flora)
• antiseptics(chlorhexidine)
• STAMPS(specifically targetted anti-microbial pepticles)
• enzymes

Question 22

what is xylitol?

Answer 22

bulk sweetener that also encourages saliva flow

-excellent agent in reducing caries risk

Question 23

what is replacement therapy?

Answer 23

to replace pathogenic bacteria by non-pathogenic bacteria

Question 24

does susceptibility to plaque increase with age?

Answer 24

yes