Question 487 · LDEK · Root canal obturation
Select the correct statement regarding the phenomena occurring when canals are filled with thermoplastic technics:
- A. sustained temperature increase of 10°C above body temperature for more than 1 min can lead to irreversible changes in periodontium.
- B. dentine and root cement are good temperature conductors.
- C. the temperature rise in different parts of the canal is the same.
- D. the thickness of the canal walls has no effect on heat conduction.
- E. the presence of sealant does not affect the temperature rise at the root surface.
Hint
Consider the classic threshold of heat injury to bone and PDL, and whether dentin is a good or a poor thermal conductor.
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