Question 421 · LDEK · Irrigation and intracanal medicaments
Indicate the true statement concerning the smear layer formed during endodontic treatment:
1) it is a layer of organic and inorganic debris covering the root canal walls after their mechanical preparation;
2) smear layer may impede the penetration of interappointment disinfectants;
3) presence of the smear layer provides better adhesion of obturation materials to the root canal walls;
4) removal of the smear layer reduces leakage in the obturated canal;
5) EDTA is the most effective irrigating solution removing the smear layer completely.
The correct answer is:
2) smear layer may impede the penetration of interappointment disinfectants;
3) presence of the smear layer provides better adhesion of obturation materials to the root canal walls;
4) removal of the smear layer reduces leakage in the obturated canal;
5) EDTA is the most effective irrigating solution removing the smear layer completely.
The correct answer is:
- A. 1,2,3.
- B. 1,2,4.
- C. 2,3,4.
- D. 1,2,5.
- E. 1,4,5.
Hint
Consider whether debris plugging the tubules helps or hinders medicament penetration and sealer adaptation, and which part of it EDTA dissolves.
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