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[Preliminary evaluation of the clinical results of calcium phosphorate cement root canal sealer].

PURPOSE
To investigate the clinic effect of calcium phosphorate cement as a root canal sealer-filler material.


METHODS
136 teeth with chronic periapical disease were instrumented and obturated with laterally condensed gutta-percha and either calcium phosphate cement(CPC) or iodoform paste. The patients were recalled and observed according to the clinic symptom and radiography after 1 week,3 months, 6 months and 1 year. The data was processed using SAS6.2 software package for Chi-square test and Wilcoxon rank test.


RESULTS
The patients of CPC group had mild reaction after treatment and the successful rate of 3-month was higher compared with the control group(with iodoform paste), however there was no different clinical effects between the two groups after one year.


CONCLUSION
Calcium phosphate cement root canal sealer can be acceptable for root canal filling , but the long term clinical results are needed be investigated.