Endodontic therapy of maxillary second molar showing an unusual internal anatomy

Resumo

The knowledge of the complex anatomy of maxillary
molars and location of extra canals are essential for diagnosis
and endodontic treatment success. Objective: The purpose of this
study was to report a clinical case showing a varying number of
palatal roots in a second maxillary molar with the aid of operating
microscope (OM). Case report: A four-rooted maxillary permanent
second molar with 2 separated palatal canals undergone endodontic
therapy. After endodontic access, examination of the chamber floor
using an operating microscope revealed two distinct palatal canals
orifices. A radiograph was taken after the working lengths of each
canal were estimated by means of an electronic apex locator which
clearly identified the four roots with independent four canals. The
canals were instrumented with ProTaper™ rotatory instruments under
irrigation with 5% sodium hypochlorite, obturated with Pulp Canal
Sealer® and continue wave technique. After completion of root canal treatment, the tooth was restored with composite resin. Results:
After endodontic access, the presence of two different palatal canals
was found in a second maxillary molar, resulting from a variation
in the number of palatal roots of this tooth. Conclusion: The high
magnification and clear illumination quality provided by the dental
operating microscope increase endodontic treatment success of the
variations in the internal anatomy of the tooth.