Clinical Efficacy of Kedo S Square Files versus Manual K Files in Root Canal Preparation of Deciduous Molars: A Randomised Clinical Trial
Dr. Prathima Gajula Shivashankarappa,
Professor and Head, Department of Paediatric and Preventive Dentistry, Indira Gandhi Institute of Dental Sciences, Sri Balaji Vidyapeeth (SBV) Deemed to be University, Pillaiyarkuppam, Puducherry-607402, India.
Introduction: The conventional approach to root canal preparation in primary molars involves hand instrumentation. However, the disadvantage of longer instrumentation time poses a challenge for dentists treating paediatric patients. As a solution, rotary file systems have been introduced to reduce chairside time and improve patient cooperation. Among the various rotary file systems available, the "Kedo S Square" rotary files are exclusive single files made of Nickel-titanium (NiTi), offering increased flexibility and variable taper to adapt to the curved canals of deciduous molars.
Aim: To assess and compare the instrumentation time and obturation quality of rotary “Kedo S Square” files with manual K files in deciduous molars.
Materials and Methods: This randomised clinical trial was conducted from July 2022 to February 2023 included 40 primary molars from four to six-year-old children requiring root canal therapy. The teeth were evenly allocated to two groups: Group 1 underwent instrumentation using “Kedo S Square” files, while Group 2 underwent instrumentation using manual K files. The instrumentation time was recorded, and post-treatment radiographs were taken to evaluate the quality of obturation by a single-blinded investigator. Statistical analysis included the Independent t-test, Levene’s Test for Equality of Variances, Chi-square test, and Fisher’s-exact test.
Results: The use of Kedo S Square files resulted in significantly less instrumentation time (p<0.001) with a mean time of 3.91±1.462 minutes. There was no statistically significant difference in obturation quality between the two groups, with a p-value of 0.427.
Conclusion: Kedo S “Square” files demonstrated comparable obturation quality with shorter instrumentation time compared to manual K files in root canals of primary molars.