Swelling after RCT is mainly caused by (Being asked as: What is the most frequent cause of pain  which occurs several days after obturation?, too):
A. Entrapped Bacteria, or the presence of bacteria in the periapical region.
B. Underfilling the root canal system
C. Overfilled root canal

1 Answer

Answer :

A. Entrapped Bacteria, or the presence of bacteria in the periapical region.

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