Comparison of the cleaning capacity of Mtwo and Pro Taper rotary systems and manual instruments in primary teeth Rotary Mtwo system versus manual K-file instruments: efficacy in preparing primary and permanent molar root canals. 'Volumetric analysis of hand and rotary root canal instrumentation and filling in primary teeth using Spiral Computed Tomography' - an invitro study. Microbiological assessment of root canals following use of rotary and manual instruments in primary molars. Effect of three nickel-titanium rotary file techniques on infected root dentin reduction.
Background : Root canal cleaning is an important step in endodontic therapy . In order to develop better techniques , a new generation of endodontic instruments has been design ed . The aim of this study was to compare the effectiveness of manual K-files ( Mani Co , Tokyo , Japan ) and two rotary systems – Mtwo ( Dentsply-Maillefer , Ballaigues , Switzerl and ) and ProTaper ( VDW , Munich , Germany)–for root canal preparation in primary molars . Material s and Methods : India ink was injected to 160 mesiobuccal and distal root canals of m and ibular primary molars . The teeth were r and omly divided into three experimental groups and one control group . In each experimental group , either manual instruments ( K-files ) or rotary instruments ( Mtwo or ProTaper ) were used to prepare root canals . After cleaning the canals and clearing the teeth , ink removal was evaluated with a stereomicroscope . Statistical analysis was done with Kruskal – Wallis and Friedman tests . Results : There were no significant differences in cleaning efficiency between manual and rotary instruments . Only ProTaper files performed significantly better in the coronal and middle thirds than in the apical third of the root canal . Conclusion : Manual K-files and the Mtwo and ProTaper rotary systems showed equally acceptable cleaning ability in primary molar root canals AIM To compare the cleaning ability and preparation time of rotary instruments ( Mtwo ) and conventional manual instruments ( K-file ) in preparing primary and permanent molar root canals . MATERIAL S AND METHODS Access cavities were prepared in 70 primary and 70 permanent teeth and  India ink was injected into 120 canals of selected molars . The teeth were r and omly divided into two main subgroups ( n=20 ) and three control groups ( n=10 ) . In each of these main subgroups , either the manual instrument ( K-file ) or the rotary system ( Mtwo ) was used to prepare root canals . After cleaning the canals and clearing the teeth , dye removal was evaluated with the help of a stereomicroscope . In addition , the time needed for root canal preparation was recorded by a chronometer . STATISTICAL ANALYSIS Statistical analyses were done using the Kruskal-Wallis , Mann-Whitney and t tests . RESULTS With regard to the cleaning ability of root canals , there were no significant differences between the K-file and Mtwo rotary system in primary and permanent teeth in the apical , middle or coronal third of the canals . Moreover , there were no significant differences between primary and permanent teeth prepared with K-files and rotary instruments . In all the groups , shorter times were recorded with the rotary technique . The working time was shorter in primary than in permanent teeth . CONCLUSION The Mtwo rotary system showed acceptable cleaning ability in both primary and permanent teeth , and achieved results similar to those of K-files in less time AIM To compare and evaluate the volumetric analysis of pre- and post-root canal instrumentation in primary teeth using h and and rotary files and also to analyse the volume of root canal filling . MATERIAL S AND METHODS A total of 20 primary teeth were divided into two groups r and omly and subjected to spiral computed tomography ( SCT ) analysis before and after instrumentation . For manual technique ( Group 1 ) , teeth were prepared using K files and rotary ( Group 2 ) preparation was performed with Mtwo files .  Volumetric enlargement was calculated using Osirix software . Root canals were then filled with rotary lentulospiral using zinc oxide-eugenol cement ( ZOE ) . The filled volume in each canal was measured using SCT and the percentage of obturated volume was calculated . The data were statistically analysed using paired t-tests . RESULTS There was a statistically significant difference in the volume of root canal enlarged in both the groups . Rotary files showed significant increase in the volume compared to K files . Mtwo instrumented root canals showed good obturated volume compared to manual technique , although voids were common in both the groups . CONCLUSION Rotary root canal instrumentation may be indicated for utilization in primary teeth , for enhancing root canal preparation and good quality of root canal filling AIM To assess the microflora of root canals in primary molars following use of rotary NiTi files and conventional h and NiTi and stainless steel files . STUDY DESIGN This r and omized clinical trial consisted of a total of 60 first and second primary molars requiring root canal treatment , who were selected from children aged 5 - 9 years . Based on type of root canal instrumentation , the teeth were r and omly assigned to three groups of twenty teeth each ; Group A : Rotary NiTi files , Group B : H and NiTi files and Group C : H and stainless steel files . Following administration of local anesthesia , isolation with rubber dam was carried out . For the purpose of instrumentation and sampling , the palatal canal of maxillary molars and the distal canal of m and ibular molars were selected . Prior to sampling , the orifices of other canals in these teeth were sealed , so as to prevent any contamination . Instrumentation was carried out in each group using respective instruments along with intermittent saline irrigation . Root canal sample s were obtained both before and after instrumentation , using sterile absorbent paper points and transferred to a sterile vial with transport fluid . Serial dilutions were prepared and cultured on suitable agar media . Both aerobic and anaerobic microbial counts were made . Data obtained was subjected to statistical analysis using Wilcoxon signed rank test and one-way Analysis of variance . RESULTS In all three groups , there was a significant reduction in both aerobic and anaerobic mean microbial count following root canal instrumentation . ( p < 0.001 ) . CONCLUSION Rotary NiTi files were as efficient as conventional h and instruments in significantly reducing the root canal microflora OBJECTIVE This study compared the bacterial reduction of in vitro infected root canals after instrumentation by 3 nickel-titanium ( NiTi ) rotary files with different taper and diameter versus manual stainless steel files . STUDY DESIGN Sixty-four single-rooted human teeth were infected with a suspension of Streptococcus sanguis measured by optical density . Teeth were divided r and omly into 4 groups of 16 and prepared with Flexofiles , GT rotary files , HERO 642 , and ProFile . Bacterial samplings were performed before ( S1 ) , during ( S2-S3 ) , and after ( S4 ) instrumentation . RESULTS All techniques significantly reduced the number of bacterial cells in the root canals ( P < .05 ) . There was no significant difference between NiTi and manual instrumentation at S2 , S3 , or S4 . Concerning bacterial reduction , the results suggest that a manual stainless steel file preparation is as efficient as a NiTi rotary instrumentation . CONCLUSION Regardless of the root canal preparation technique , its taper , and diameter , the root dentin remained infected and was not bacteria-free at the end of the experiment
Conclusion Rotary instrumentation shows equivalent cleaning efficiency than h and files depending on the system of instrumentation and techniques used .
However , use of rotary in primary teeth leads to improved shaping of canals providing better quality of treatment in less time .
Aim To develop a scientifically current and evidence based protocol on the efficacy of rotary and h and root canal instrumentation in primary teeth .
How to cite this article Panchal V , Jeevan and an G , et al. Comparison between the Effectiveness of Rotary and Manual Instrumentation in Primary Teeth : A Systematic Review .