caries Flashcards
what does DMFT stand for?
decayed, missing, filled teeth
what are some problems with the DMFT index?
- not all teeth that are missing are missing due to caries.
- it is irreversible so not good for measuring beneficial interventions
what is def
a count of all primary teeth that are decayed, extracted due to caries or filled
what is dmfs?
a count of all decayed, missing, or filled tooth surfaces
what are the two aproaches to caries risk assesment?
1) population based approach
2) individual
what are the ‘big 4’ to chairside prevention?
- brushing advice
- diet advice
- topical flourides
- fissure sealants
what is the critical pH?
5.5
what are the two different kinds of sweeteners?
- nutritive sweeteners
- intense (non-nutritive)
give some examples of nutritive sweeteners?
sorbitol, mannitol, xylitol
give some examples of intense sweeteners?
saccharine, aspartame, acesulfame-k
what are the 4 zones of enamel caries?
- translucent zone
- dark zone
- body of lesion
- surface zone
what are the 3 zones of established dentine caries?
- advancing front
- zone of bacterial penetration
- zone of destruction
where is known as typical stagnation areas?
- gingival recession (root caries)
- adjacent to partial dentures
- adjacent to restorations
what is meant by acidogenic?
transports sugars in diet and convert to acid (lactic acid)
what is meant by aciduric?
thrive at low pH
what are the three theories to cariogenic plaque?
- specific plaque hypothesis
- non-specific plaque hypothesis
- ecological plaque hypotheses
what are the 2 layers of dentine caries?
- outer zone(infected zone)
- inner zone(affected zone)
what is a stepwise excavation?
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
caries is present if what 4 things interact
- teeth
- plaque bacteria
- sugar
- time
what are some common disclosing agents?
- bismark brown
- basic fuschin
- fast green
- flourescin
- erythrosin(most common)
what are some methods of plaque control?
- antibiotics( distrupt the oral flora)
- antiseptics(chlorhexidine)
- STAMPS(specifically targetted anti-microbial pepticles)
- enzymes
what is xylitol?
bulk sweetener that also encourages saliva flow
-excellent agent in reducing caries risk
what is replacement therapy?
to replace pathogenic bacteria by non-pathogenic bacteria
does susceptibility to plaque increase with age?
yes
