Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation

The purpose of the mechanical root canal preparation is to clean it and give right shape. should be carried out in a way that maintains original curvature initial orientation apical end. Insufficient may prevent effective chemical decontamination obturation full working length. study aims evaluate shaping ability effectiveness NiTi rotary reciprocating endodontic instruments, compared standard hand files using magnetic resonance imaging based on spin echo. Material methods: A comparative severely curved canals’ abilities three systems K-type was performed, with 40 training “endo-blocks” presenting “L-shaped” canal. topography geometry “before” “after” obtained by echo used. main measurement made RARE sequence, slice thickness reduced 100 micrometers. In order improve signal-to-noise ratio, NA = 25 To minimize time, field view limited cuboid 17 × 16 3 mm, resolution 33 31 Each 3D image consisted 512 30 voxels. plane has been selected such as fully illustrate course model For TR 5 s TE 36 ms, TA 1.5 h. Measurements were performed twice, before after endo-blocs type tools. Results: use instruments caused substantial alteration angle canals change discrepancy observed during simulated WaveOne led largest volume variation. No dependence between amount material removed measured intracanal side when Preparation revealed relationship measuring removed, lower values for internal curvatures. Conclusions: All studied allow safe simulating vivo conditions. abbreviation does not seem significantly altered following simulated, canals. echo-based technique can utilized visualization root’s vitro their future, microscopy become diagnostic tool supporting work clinician.