Sonic, ultrasonic and manual instruments in the control of periodontal disease: an in vitro evaluation

Abstract

The purpose of this study was evaluating the damage caused by root planning through different types of instrumentation. To perform it, 30 artificial teeth were selected from Prodens trademark, and their roots were divided in longitudinal sense and later included partly in blocks type IV plaster. Next they were submitted to three different types of root instrumentation: manual, sonic and ultrasonic. In each group 15 strokes apex coronary was carried out. After the analysis of root structures, they were evaluated through a stereoscope with 8x magnification; the images were scanned and the damage caused to the dentin surface was measured in total area with software “Image J”. The measures noted were statistical analyzed trough the tests ANOVA/Tukey, comparing the different types of instrumentation. After instrumentation, statistical difference was found (p <0.001) among the three groups. A lower wear of the root structure was obtained with manual instrument with an average of 0.62mm², followed by the sonic tool wear of 1.07mm², but a greater wear was found with the ultrasonic instrument: 1.56mm². In this study was possible conclude that the instrumentation with sonic and ultrasonic methods may provoke more damage in the root estructures.