W3 Caries

Question 1

I. What is the definition of caries?

Answer 1

1. Dental caries is an infectious microbiological disease of the teeth that results in localised dissolution and destruction of the calcified tissues.
2. Demineralisation – under pH 5.5

Question 2

II. Etiology of caries
1. What are the 4 causes of caries?

Answer 2

1. Plaque
2. Cariogenic bacteria
3. Sugar
4. Fissure draw

Question 3

II. Etiology of caries
2. Why is Plaque the cause of caries?

Answer 3

1. Plaque predilection places
   – Pit and fissures
   – Smooth surface –
   under the contactpoints
   – Gingival third on vestibular/
   lingual surface
   – Root surface – old age
2. Supragingival plaque

Question 4

II. Etiology of caries
3. List 2 examples of bacteria that cause caries

Answer 4

1. Streptococcus mutans
2. Lactobacilli

Question 5

II. Etiology of caries
4. Why is sugar the cause of caries?

Answer 5

Sugar – break down - acidic attack

Question 6

II. Etiology of caries
5. Why is fissure draw the cause of caries?

Answer 6

1. Easy to clean
2. Difficult to clear

Question 7

II. Etiology of caries
6. Identify

Answer 7

1. Substrate
2. Time
3. Host
4. Microorganism

Question 8

III. Types of caries
1. What are the 3 types of caries?

Answer 8

1. Enamel
2. Dentin
3. Cement

Question 9

III. Types of caries
2. How are primary caries formed?

Answer 9

It is originally formed on an intact tooth surface

Question 10

III. Types of caries
3. How are secondary caries formed?

Answer 10

They begins along the edge of the restoration (fillings, inlays, crowns) anchored in the tooth, in case of its incorrect edge closure

Question 11

III. Types of caries
4. What are the 6 types of caries based on spatial progression of caries?

Answer 11

1. Caries incipiens
2. Caries superficialis
3. Caries media
4. Caries profunda
5. Caries penetrans
6. Arrested caries

Question 12

III. Types of caries
5A. Describe Caries incipiens

Answer 12

white spot – no cavity – remineralizable

Question 13

III. Types of caries
5B. Describe Caries superficialis

Answer 13

localizes - enamel

Question 14

III. Types of caries
5C. Describe Caries media

Answer 14

progression in the dentine

Question 15

III. Types of caries
5D. Describe Caries profunda

Answer 15

deep caries lesion, pulp demarkated

Question 16

III. Types of caries
5E. Describe Caries penetrans

Answer 16

reach the pulp

Question 17

III. Types of caries
5F. Describe Arrested caries

Answer 17

– remineralized – darker
- only incipient caries!

Question 18

III. Types of caries
6. What are the 4 zones of incipient caries?

Answer 18

1. Surface zone
   - Opaque
   - remineralized
2. Body of the lesion
   - High porosity
   - Less minerals
3. Dark zone
4. Translucent zone

Question 19

III. Types of caries
7. What are the 5 zones of dentinal caries?

Answer 19

1. Infected dentine
2. Turbid dentine
3. Transparent dentin
4. Subtransparent dentin
5. Normal dentine

Question 20

III. Types of caries - Zones of dentinal caries
8A. Describe infected dentin zone

Answer 20

outer carious dentin

Question 21

III. Types of caries - Zones of dentinal caries
8B. Describe Turbid dentin zone

Answer 21

• Bacteria reach
• Decreased mineral content
• Destroyed collagen

Question 22

III. Types of caries - Zones of dentinal caries
8C. Describe Transparent dentin zone

Answer 22

• Loss of mineral from the intertubular dentin
• Free from bacteria
• Intact collagen
• inner carious dentin

Question 23

III. Types of caries - Zones of dentinal caries
8D. Describe Subtransparent dentin zone

Answer 23

remineralization

Question 24

III. Types of caries - Zones of dentinal caries
8E. Describe Normal dentin zone

Answer 24

reparative dentin

Question 25

III. Types of caries 9. What are the types of caries based on the enamel prism localization?

Answer 25

1. Pit and fissure 2. Smooth surface

Question 26

III. Types of caries 10. Describe rampant caries

Answer 26

- Children – „baby bottle” caries - Very fast - White color (caries alba) - Soft pulpy mass (caries humida)

Question 27

III. Types of caries 11. Describe caries tarda

Answer 27

- Old patients - Slow progression - Drier and harder (caries sicca) - Dark brown, black (caries nigra)

Question 28

III. Types of caries 12. How do root caries occur?

Answer 28

For root caries to occur, the root of the tooth must be exposed.

Question 29

IV. What are indices of caries?

Answer 29

– 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