CAP 2

Question 1

Name 4 non carious tooth loss reason

Answer 1

Attrition, Abrasion, Erosion, Abfraction

Question 2

What is the acidogenic theory?

Answer 2

Acid is produced form fermented sugars

Bread+Saliva+Bacteria+Extracted teeth= demineralisation.

Question 3

Describe the enamel core

Answer 3

Prism core

Tightly packed hydropxyapatite crystals

Question 4

Describe the enamel sheath

Answer 4

The periphery

Less tightly packed crystals so more means for demineralisation as acid can diffuse in the gaps

Question 5

Describe the Translucent zone (3)

Answer 5

1-2% mineral loss
Few large pores due to loss of prism periphery
Penetrated by Quinoline (fills prism periphery)

Question 6

Describe the Dark zone (5)

Answer 6

Dark with Quinoline
5-10% porosity
90-95% of lesions
Large and small pores 
Demineralisation and remineralisation occurring

Question 7

Describe the Body of lesion (3)

Answer 7

Straie of Retzius more obvious
20-25% porosity
Enamel is mostly translucent

Question 8

Describe the Surface zone (3)

Answer 8

Protected
Highly mineralised (high F content)
Re laying down of minerals dissolved by deeper layers

Question 9

What is arrested caries?

Answer 9

Remineralised caries

Question 10

How do caries become arrested?

Answer 10

Change in the environment (altered diet, fluoride, plaque control)

Question 11

Arrested caries can be brown, what staining is that?

Answer 11

Exogenous