A smart rotary technique versus conventional pulpectomy for primary teeth: A randomized controlled clinical study.

N Mokhtari,As Shirazi,M Ebrahimi

doi:10.4317/jced.53968

Abstract

BackgroundTechniques with adequate accuracy of working length determination along with shorter duration of treatment in pulpectomy procedure seems to be essential in pediatric dentistry. The aim of the present study was to evaluate the accuracy of root canal length measurement with Root ZX II apex locator and rotary system in pulpectomy of primary teeth.Material and MethodsIn this randomized control clinical trial complete pulpectomy was performed on 80 mandibular primary molars in 80, 4-6-year-old children. The study population was randomly divided into case and control groups. In control group conventional pulpectomy was performed and in the case group working length was determined by electronic apex locator Root ZXII and instrumented with Mtwo rotary files. Statistical evaluation was performed using Mann-Whitney and Chi-Square tests (P<0.05).ResultsThere were no significant differences between electronic apex locator Root ZXII and conventional method in accuracy of root canal length determination. However significantly less time was needed for instrumenting with rotary files (P=0.000).ConclusionsConsidering the comparable results in accuracy of root canal length determination and the considerably shorter instrumentation time in Root ZXII apex locator and rotary system, it may be suggested for pulpectomy in primary molar teeth. Key words:Rotary technique, conventional technique, pulpectomy, primary teeth.

Highlights

One of the most important purposes of pediatric dentistry is to maintain deciduous teeth for functional and esthetic purposes, preserve arch length and normal eruption of permanent teeth
A clinical study by Saritha et al [3], on accuracy of root canal length measurement in deciduous teeth with Root ZX II apex locator showed favorable results .In another study conducted by Neena et al [4], the accuracy of root canal measurement in both techniques, apex locator and digital radiography were comparable with paralleling technique
In an in-vivo study performed by Makarem et al [11], on comparing the the quality of canal filling of rotary and manual instrumentation in mandibular second primary molars, similar results were found between the both techniques

Summary

Introduction

One of the most important purposes of pediatric dentistry is to maintain deciduous teeth for functional and esthetic purposes, preserve arch length and normal eruption of permanent teeth. The results of an ex vivo study by Beltrame et al [5], proved that there was no statistically significant difference between the accuracy of determining working length with Root ZX apex locator and conventional technique. In an in-vivo study performed by Makarem et al [11], on comparing the the quality of canal filling of rotary and manual instrumentation in mandibular second primary molars, similar results were found between the both techniques. In control group conventional pulpectomy was performed and in the case group working length was determined by electronic apex locator Root ZXII and instrumented with Mtwo rotary files. Conclusions: Considering the comparable results in accuracy of root canal length determination and the considerably shorter instrumentation time in Root ZXII apex locator and rotary system, it may be suggested for pulpectomy in primary molar teeth

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