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[Clinical study on effects of root canal instrumentation on the root canal microflora]
Abstract
Objective:
To investigate the effects of instrumentation and ultrasonic treatment on the root canal flora.
Methods:
A total of 21 single-rooted teeth with chronic apical periodontitis were selected and prepared using step-back/ultrasonic technique, Samples were taken before and after the step-back preparation, and after the ultrasonic treatment.
Results:
The number and species of bacteria in the root canal were both reduced dramatically and there were significant differences among the three groups (P < 0.05).
Conclusion:
The instrumentation and ultrasonic treatment of root canal can effectively reduce the number and species of root canal microflora.