Which of the following failure may be treated nonsurgically:
a. Post filling that has removed.***
b. Severe apical perforation.
c. Very narrow canal with a periapical lesion and the apex can not be reached.
d. None of the above.
a. Post filling that has removed.***
b. Severe apical perforation.
c. Very narrow canal with a periapical lesion and the apex can not be reached.
d. None of the above.
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