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. 2020 Jul-Sep;13(3):393-398.
doi: 10.25122/jml-2020-0136.

Performance Evaluation on Rotary Preparation of Root Canal by Beginner Operators

Mihaela Chirila  1 , Ioana Suciu  1 , Bogdan Dimitriu  1 , Nicoleta Maru  2 , Ecaterina Ionescu  3 , Georgiana Florentina Croitoru  1 , Oana Amza  1
Affiliations

Performance Evaluation on Rotary Preparation of Root Canal by Beginner Operators

Mihaela Chirila et al. J Med Life. 2020 Jul-Sep.

Abstract

This study aims to analyze the performance of rotary root canal preparation, conducted by beginner operators (students). After acquiring the necessary skills involved in applying endodontic preparation techniques on extracted teeth, all students from a cohort learned to use ProTaper Universal files (Dentsply Maillefer). The preclinical training had several stages. Experience 1: instrumentation on extracted single-root teeth; Experience 2: instrumentation on EndoTraining blocks (Dentsply Maillefer); Experience 3: instrumentation on EndoTraining blocks (Dia Dent Group International); Experience 4: Instrumentation on extracted multiradicular teeth. Preparation was done according to the manufacturer's instructions, the initial file is Sx, followed by S1, S2, F1, F2 and the last file is F3. A batch of 50 teeth (E1, E2, E3, E4) was randomly selected to evaluate the onset of the rotary preparation of young operators. Two independent evaluators analyzed the array radiologically by stereomicroscope evaluation (E1, E4) and photo-analysis of the resulting Endo Training blocks (E2, E3). The success rate was 80% for E1, 72% for E2, 64% for E3 and 76% for E4 (p<0.05). The following were considered a failure: ledge formation and apical transportation in 10.66%, over instrumentation in 6.66%, zipping in 3.33%, and instrument fracture in 4% of cases. Endodontic instrumentation techniques require training to acquire the necessary skills. Rotary root canal instrumentation techniques used almost exclusively in modern endodontics require adequate preclinical training.

Keywords: Pre-clinical; ProTaper Universal; endo training blocks.

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Figures

Figure 1:
Figure 1:
Experience 1. Instrumentation of 2.1 with rotary PTU. a,b,c pre-treatment, d- post-treatment apical over-preparation. Image taken using a stereomicroscope.
Figure 2:
Figure 2:
Experience 1. a,b – apical transposition, c- unharmed apex. Image taken using a stereomicroscope.
Figure 3:
Figure 3:
Experience 2. Instrumentation on Endo Training blocks (Dentsply Maillefer), a- correct preparation, b- apical transportation, c- ledge and zipping, d- ledge, e- instrument separated.
Figure 4:
Figure 4:
Experience 3. Instrumentation on Endo Training blocks (Dia Dent Group International), a- correct preparation, b-ledge, c – apical zipping, d - ledge, e- instrument separated.
Figure 5:
Figure 5:
Experience 4. Instrumentation on bicuspid extracted tooth. a,c - post-treatment apical over-prepartion, b- apical transportation. Image taken using a stereomicroscope.
Figure 6:
Figure 6:
Experience 4. Instrumentation on bicuspid extracted tooth. Image taken using a stereomicroscope. Apex correctly prepared.
Figure 7:
Figure 7:
Succes percentage of experience using rotary ProTaper Universal in root canal instrumentation by beginner operators.
Figure 8:
Figure 8:
Cause of failure on rotary preparation of root canal by beginner operators.
See this image and copyright information in PMC

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