ANALYSIS OF CANAL TRANSPORTATION, CENTERING ABILITY AND REMAINING DENTIN THICKNESS OF DIFFERENT SINGLE FILE ROTARY SYSTEMS IN PRIMARY TEETH; A CBCT ASSESSMENT

Abstract

Objective: This study aimed to evaluate and compare canal transportation, centering ability, dentine thickness and instrumentation time of manual instrumentation (ISO standardized stainless steel K- file) and different single file system in primary root canals using Cone Beam Computed Tomography (CBCT). Materials and Methods: Sixty extracted human lower primary second molar teeth with at least 7mm root length were randomly divided in to three groups (Group one- Hand K- files, Group two- One-Shape rotary, Group three- Wave One- Gold reciprocating) were included in the study. CBCT images were obtained before and after the instrumentation for each group. Canal transportation, centring ability, dentin thickness and instrumentation time were evaluated for each group. Results: A significant difference was found in transportation, centering ability between Group one &Group two, Group one &Group three (P<0.05) at middle and apical levels of the canalsrespectively. A significant difference was found in dentin thickness between Group one &Group two, Group one& Group three (P<0.05) at apical level of the canals. Instrumentation time was less in Group two and Group three than Group one (P<0.05).No significant difference was found between Group two &Group three (P<0.05). Conclusion: Use of single file system in primary teeth results in reduction of instrumentation time and maintains original shape of root canal.