Assessment of apical seal obtained by three obturating techniques using dye penetration method and macro lens photography : An in-vitro study

Abstract

The main aim this in vitro study was to compare three techniques and establish the clinically best technique in terms of sealing capabilities, lateral adaptation and microleakage at the root dentine–material interface with dye penetration using ”macro-lens photography”. This method has been used for the first time and was found effective, reliable as well as less time consuming for the measurement of dye leakage. Methodology: Mesiobuccal roots of ninety-three mandibular molars were instrumented (Profile.04) using crowndown technique and divided into three groups. Group 1: obturated with lateral condensation, group 2: obturated with Thermafil plus and Group 3: obturated with Obtura II. AH plus sealer was used in all the three groups. All specimens were stored in 100% humidity for 1 week, coated with nail polish, except apical 2mm, and were suspended in blank India ink. Molars were decalcified, rendered transparent and linear dye penetration was measured, initially, using StereoZoom Microscope and macro-lens photography. Results: Macro-lens photography proved better as compared to StereoZoom microscope. No statistical difference was found between Lateral Condensation and Obtura II (P>0.05). However, significant statistical difference was found between lateral condensation and Thermafil (P<0.05) (post hoc test). Conclusion: Using Macro-lens photography, thermafil system proved to be the material of choice when compared with lateral condensation and Obtura II for filling of the root canal system.