(From Sturdevants art & science of operative dentistry 4th edition)
1. Polarization of DC – limited segment of population experiences most of disease . 80% DC in 20% children from lower socioeconomic status
2. MC chronic childhood disease – DC
3. DC causing organisms – S mutans – 8 strains a to h, S cricetus, S rattus , S ferus, S sobrinus
4. Most imp factor in causing DC is – high frequency sucrose exposure
5. Plaque formation
a) Acquired pellicle forms within 2 hours of brushing (30 mins -1 hr)
b) 12-24 hrs- cocci
c) 1-3days –cocci +filamentous bacteria
d) 1wk – palisades of cocci + filamentous bacteria
e) 3 wks – “corncorb”
6. Colonizations
| Dorsum of tongue | Micrococcus mucilaginous, S salivarius |
| Teeth | S mutan , S mitis |
| Non carious teeth | S sanguis |
| Buccal mucosa | S mitis |
7. Caries producing organisms – anerobic, ph <5.5 & negative redox potential
8. Combination of food and shelter- ‘ecological niche’
9. Niche saturation leads to ‘colonization resistance’
10. “Bacteriocin” produced by S mutans leads to colonization resistance
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