Endodontic treatment for necrotic immature permanent teeth using MTA and calcium hydroxide. A retrospective study

Resumo

Endodontic treatment of young permanent teeth with
incomplete root formation and necrotic pulp has been a challenge for
the dentist. It is necessary to induce the formation of apical barrier
(apical plug), enabling the complete root canal filling. Objective: This
retrospective clinical study compared the protocols for treatment
of teeth with incomplete root formation, using calcium hydroxide
(CH) or mineral trioxide aggregate (MTA). Material and methods:
28 patients with incomplete root formation have undergone root
canal treatments in the period from 2000 to 2009 were selected.
The procedures for cleaning, shaping and intracanal medication (CH
paste) were performed in a standardized manner. In 13 patients,
after using the CH paste (14 days), apical plugs with MTA were
made. In the remaining 15 teeth monthly exchanges with CH paste
were executed until it was observed radiographically the formation of
the apical barrier. In all cases the canals were filled conventionally
with gutta-percha and sealer. Initially, follow-ups were made on a quarterly and semiannually at the end of first year. Results: All
apical lesions showed apical healing between 4 and 13 months after
starting treatment. There was not noted the continuing process of
root formation. Conclusion: It was concluded that the treatment of
teeth with incomplete root formation and necrotic pulp with the use
of MTA as apical plug has the same clinical results compared with
the use of CH, with the advantage of less clinical time.