Comparison between Rotary (Mtwo) and Manual (H-Files) Techniques for Instrumentation of Primary Teeth Root Canals

• Main Authors: D R Murali Krishna, Jyothsna Vittoba Setty, Ila Srinivasan, Anjana Melwani
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2019-01-01
• Series: Indian Journal of Dental Research
• Subjects: h-files; instrumentation time; mtwo rotary system; operator compliance; patient compliance
• Online Access: http://www.ijdr.in/article.asp?issn=0970-9290;year=2019;volume=30;issue=6;spage=899;epage=903;aulast=Krishna

Background: The aim of the study is to compare instrumentation time between manual (H-files) and rotary (Mtwo) files along with patient and operator compliance in primary lower molars. Materials and Methods: 30 primary teeth were selected and divided into two groups of 15 in each group instrumented with H-files and Mtwo files respectively. Time taken for instrumentation was calculated using stop watch. Patient and operator compliance was recorded through questionnaire. Statistical Analysis Used: Chi Square test was used to compare the distribution of teeth and number of canals. Independent Student t test was used to compare the mean time taken for instrumentation with both techniques in different canals and the mean overall time for instrumentation where P value is less than 0.001. Chi Square Goodness of Fit test was used to compare the patient's and operator's perspective regarding instrumentation techniques. Results: The instrumentation time recorded with Mtwo files is less when compared with H–files. 66.7% children preferred H–files over Mtwo, 60% children reported pain while using H–files, 60% of children were scared on sight of Mtwo rotary system. Operator could manage 80% of children easily while using H–files, but it was found that operator ease of comfort was more with Mtwo rotary system. Conclusion: Time taken for instrumentation with Mtwo files was less as compared to H-files. It was convenient for the operator to manage the child using H-files but with the use of Mtwo files, marked reduction in the instrumentation time was appreciated.