Radiographic Interpretation of Caries Flashcards
Plaque consists of what percentage of bacteria?
60-70%
What are the 3 requirements for the formation of caries?
- Susceptible hose
- Microorganisms
- Appropriate substrate
What are the peak incidences of caries?
6-8 years
11-19 years
56-65 years
What 3 things have caused a decline in caries incidence?
- Fluoridated water
- Fluoridated dentrifices
- Improved oral hygiene and oral health care
What does a full mouth radiographic survey consist of?
14 periapicals and 4 bitewings
These caries proceed faster in deciduous teeth than in permanent:
Acute caries
These caries have a slower progression, larger surface lesion, usually adults:
Chronic Caries
What do arrested caries feel and look like?
Polished and black.
Feels leathery when exploring
Originates on virgin surface:
Primary
In immediate vicinity of restoration:
Secondary
Describe incipient proximal caries:
- early stage
- less than half way through enamel
- white spot
- cone or v shape with broad base at surface of enamel.
Describe moderate proximal caries:
- caries extending more than half-way through the enamel but not involving the DEJ.
Describe advanced proximal caries:
- caries at or through the DEJ that extend no more than half way through the dentin to the pulp.
- dentinal tubules act as a tract for microorganisms.
- 2nd radiolucent triangle in dentin with base at DEJ.
Describe severe proximal caries:
Caries of enamel and dentin extending more than half-way through the dentin towards the pulp.
Can occlusal caries be detected radiographically?
Only if it has entered into the dentin.
What shape are occlusal caries and why?
Diamond, due to the direction of enamel rods.
What 3 things increase caries incidence on cemental/root surfaces?
- Recession
- Loose contacts
- Xerostomia
This is a radiolucent artifact caused by change in density and shape of the tooth at cervical margin.
Cervical burnout.
These caries appear as scooped out (mouse nibble) radiolucency below the CEJ. These occur above the level of bone.
Cervical/cemental caries
These type of caries are caused by xerostomia brought on by damage to salivary glands.
Radiation Caries
Do caries present themselves clinically or radiographically initially?
CLinically, you need about 40% decalcification before seen on radiograph.
