Dental treatment - Endodontic perforation

# Which of the following locations would a perforation demonstrate the BEST prognosis?
A. Floor of pulp chamber
B. Coronal 1/3 of root
C. Middle 1/3 of root
D. Apical 1/3 of root

The correct answer is D. Apical third of root.

Apical perforations occur through the apical foramen or the body of the root to form  a new canal.

The more apical the perforation, the more favorable the prognosis for the tooth. (except for the coronal perforations)

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