W3 Caries Flashcards
I. What is the definition of caries?
- Dental caries is an infectious microbiological disease of the teeth that results in localised dissolution and destruction of the calcified tissues.
- Demineralisation – under pH 5.5
II. Etiology of caries
1. What are the 4 causes of caries?
- Plaque
- Cariogenic bacteria
- Sugar
- Fissure draw
II. Etiology of caries
2. Why is Plaque the cause of caries?
- Plaque predilection places
– Pit and fissures
– Smooth surface –
under the contactpoints
– Gingival third on vestibular/
lingual surface
– Root surface – old age - Supragingival plaque
II. Etiology of caries
3. List 2 examples of bacteria that cause caries
- Streptococcus mutans
- Lactobacilli
II. Etiology of caries
4. Why is sugar the cause of caries?
Sugar – break down - acidic attack
II. Etiology of caries
5. Why is fissure draw the cause of caries?
- Easy to clean
- Difficult to clear
II. Etiology of caries
6. Identify
- Substrate
- Time
- Host
- Microorganism
III. Types of caries
1. What are the 3 types of caries?
- Enamel
- Dentin
- Cement
III. Types of caries
2. How are primary caries formed?
It is originally formed on an intact tooth surface
III. Types of caries
3. How are secondary caries formed?
They begins along the edge of the restoration (fillings, inlays, crowns) anchored in the tooth, in case of its incorrect edge closure
III. Types of caries
4. What are the 6 types of caries based on spatial progression of caries?
- Caries incipiens
- Caries superficialis
- Caries media
- Caries profunda
- Caries penetrans
- Arrested caries
III. Types of caries
5A. Describe Caries incipiens
white spot – no cavity – remineralizable
III. Types of caries
5B. Describe Caries superficialis
localizes - enamel
III. Types of caries
5C. Describe Caries media
progression in the dentine
III. Types of caries
5D. Describe Caries profunda
deep caries lesion, pulp demarkated
III. Types of caries
5E. Describe Caries penetrans
reach the pulp
III. Types of caries
5F. Describe Arrested caries
– remineralized – darker
- only incipient caries!
III. Types of caries
6. What are the 4 zones of incipient caries?
- Surface zone
- Opaque
- remineralized - Body of the lesion
- High porosity
- Less minerals - Dark zone
- Translucent zone
III. Types of caries
7. What are the 5 zones of dentinal caries?
- Infected dentine
- Turbid dentine
- Transparent dentin
- Subtransparent dentin
- Normal dentine
III. Types of caries - Zones of dentinal caries
8A. Describe infected dentin zone
outer carious dentin
III. Types of caries - Zones of dentinal caries
8B. Describe Turbid dentin zone
- Bacteria reach
- Decreased mineral content
- Destroyed collagen
III. Types of caries - Zones of dentinal caries
8C. Describe Transparent dentin zone
- Loss of mineral from the intertubular dentin
- Free from bacteria
- Intact collagen
- inner carious dentin
III. Types of caries - Zones of dentinal caries
8D. Describe Subtransparent dentin zone
remineralization
III. Types of caries - Zones of dentinal caries
8E. Describe Normal dentin zone
reparative dentin
III. Types of caries
9. What are the types of caries based on the enamel prism localization?
- Pit and fissure
- Smooth surface
III. Types of caries
10. Describe rampant caries
- Children – „baby bottle” caries
- Very fast
- White color (caries alba)
- Soft pulpy mass (caries humida)
III. Types of caries
11. Describe caries tarda
- Old patients
- Slow progression
- Drier and harder (caries sicca)
- Dark brown, black (caries nigra)
III. Types of caries
12. How do root caries occur?
For root caries to occur, the root of the tooth must be exposed.
IV. What are indices of caries?
– DMF-T, DMF-S
– D/d – decayed; M/m – missing; F/f - filled
– dmf, df, def – primary teeth e – extraction indication – T – tooth; S - surface
– RCI – root caries index
