What is the cause of the apical periodontitis after extirpation and instrumentation and temporarely dressing. a. entrapped Bacteria. b. Chemical irritation of the solutions. c. Mechanical irritation of the instruments. d. One or any combination of the above.

What is the cause of the apical periodontitis after extirpation and instrumentation and  temporarely dressing.
 a. entrapped Bacteria.
 b. Chemical irritation of the solutions.
 c. Mechanical irritation of the instruments.
 d. One or any combination of the above.
by

1 Answer

Answer :

d. One or any combination of the above.
by

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