Evaluation of foraminal location accuracy of an integrated endodontic motor employed with different rotational speeds

Abstract

Objective: to evaluate the accuracy of the control of the apical limit of instrumentation of the SENSORY endodontic motor, activated at three rotation speeds (300, 600 and 900 RPM) and apical automatic stop function (Auto Apical Stop - AAS). Material and methods: Sixty single-rooted human mandibular premolars had their access performed and the foraminal diameter was standardized at 300 µm. The teeth were randomly divided into three groups (n=20) and had their canals prepared with a Logic 30/05 instrument, activated at the predefined speed and the AAS function set to the 0.0 mark. The instruments were measured using a digital caliper and the actual canal length was measured using the direct visual method under magnification. Results: the absolute values of mean and precision errors (±0.5 mm) obtained were respectively: 0.21 mm and 95% (300 RPM), 0.26 mm and 95% (600 RPM), 0.20 mm and 95% (900 RPM). There was no significant difference between groups (P>0.05). Conclusion: Under the conditions of this study, the use of the automatic stop function provided adequate and accurate control of the apical limit during endodontic shaping at all speeds tested.

Keywords: Endodontics. Dental Equipment. Odontometry.