Abstract
Ultrasonic endodontics, with either a continuous flow of irrigant or an intermittent irrigant flush, was carried out on teeth with a mature or immature root canal wall. Temperature changes were measured with thermocouples placed inside the root canal and on the external root surface. A continuous flow of irrigant caused the external temperature to fall from 37°C to 32°C. In the intermittent technique a temperature peak of 45°C was recorded internally and 40°C at the external root surface. The thickness of the root canal wall had an effect on the rate of temperature change rather than the final temperature. Ultrasonic endodontics, with either a continuous flow of irrigant or an intermittent irrigant flush, was carried out on teeth with a mature or immature root canal wall. Temperature changes were measured with thermocouples placed inside the root canal and on the external root surface. A continuous flow of irrigant caused the external temperature to fall from 37°C to 32°C. In the intermittent technique a temperature peak of 45°C was recorded internally and 40°C at the external root surface. The thickness of the root canal wall had an effect on the rate of temperature change rather than the final temperature.
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