pH changes in dental tissues after root canal filling with c

[tirath]

The pH changes in dental tissues of monkeys were studied by means of pH indicators after endodontic treatment with calcium hydroxide. Untreated teeth with pulpal necrosis showed a pH of 6.0 to 7.4 in pulp, dentin, cementum, and periodontal ligament. Replanted and nonreplanted teeth with completed root formation and treated with calcium hydroxide showed pH values in the circumpulpal dentin of 8.0 to 11.1, and in the more peripheral dentin of 7.4 to 9.6. In teeth with incomplete root formation, the entire dentin showed a pH of 8 to 10. The pH of the cementum was not influenced by the calcium hydroxide. However, in resorption areas, an alkaline pH was also observed at the exposed dentinal surfaces.

        

[sushantpatel_doc]

How does MTA fare in comparision to calcium hydroxide if applied periapicaly through the canals?

        

[tirath]

Three clinical cases have been treated with the use of an apical plug of MTA for apexification. All three cases were central incisors that had suffered premature interruption of root development as a consequence of trauma. According to the treatment protocol, the root canals were rinsed with 5% NaOCl; then, calcium hydroxide paste was placed in the canals for 1 week. Consequently, the apical portion of the canal (4 mm) was filled with MTA. The remaining portion of the root canals was then closed with thermoplastic gutta-percha. At 6-month and 1-year follow-up period the clinical and radiographic appearance of the teeth showed resolution of the periapical lesions. MTA appears to be a valid option for apexification with its main advantage being the speed at which the treatment can be completed.

        

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