Question 99 (part 2) · LDEK · Dentin
Choose correct statements regarding tertiary dentin:
1) it is formed between pulp and dentin in a localized manner, restricted to projection of stimulus effect;
2) it is formed as a reaction to pathologic external stimulation (such as attrition, abrasion, erosion, caries, preparation and restoration of the cavity);
3) it contains higher number of tubules, arranged curlily or irregularly, sometimes with no tubules and sometimes looking like bone tissue;
4) it can be divided into reactionary and reparative;
5) it is formed during tooth development, until the end of apexification;
6) it constitutes the most outer layer of dentin, located by the dentoenamel junction.
Correct answer is:
2) it is formed as a reaction to pathologic external stimulation (such as attrition, abrasion, erosion, caries, preparation and restoration of the cavity);
3) it contains higher number of tubules, arranged curlily or irregularly, sometimes with no tubules and sometimes looking like bone tissue;
4) it can be divided into reactionary and reparative;
5) it is formed during tooth development, until the end of apexification;
6) it constitutes the most outer layer of dentin, located by the dentoenamel junction.
Correct answer is:
- A. 1,3,4.
- B. 2,4,6.
- C. 1,3,5.
- D. 2,5,6.
- E. 1,2,4.
Hint
Tertiary dentin is the localised response to injury; compare it with primary (developmental) and mantle (outermost) dentin.
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