Sealing ability of three root-end filling materials prepared using an erbium: Yttrium aluminium garnet laser and endosonic tip evaluated by confocal laser scanning microscopy

• Published in: Journal of conservative dentistry Vol. 18; no. 4; pp. 327 - 330
• Main Authors: Nanjappa, A Salin, Ponnappa, K C, Nanjamma, K K, Ponappa, M C, Girish, Sabari, Nitin, Anita
• Format: Journal Article
• Language: English
• Published: India Medknow Publications and Media Pvt. Ltd 01.07.2015; Medknow Publications & Media Pvt. Ltd; Medknow Publications & Media Pvt Ltd
• Subjects: Aqueous solutions; Cement; Dental fillings; Dental sealants; Laser dentistry; Lasers; Methods; Original; Root canal therapy; Standard deviation; Teeth; Variance analysis; Chitra-CPC; Biodentine; confocal laser scanning microscope; MTA; Er:YAG laser
• DOI: 10.4103/0972-0707.159746
• ISSN: 0972-0707

(1) To compare the sealing ability of mineral trioxide aggregate (MTA), Biodentine, and Chitra-calcium phosphate cement (CPC) when used as root-end filling, evaluated under confocal laser scanning microscope using Rhodamine B dye. (2) To evaluate effect of ultrasonic retroprep tip and an erbium:yttrium aluminium garnet (Er:YAG) laser on the integrity of three different root-end filling materials. The root canals of 80 extracted teeth were instrumented and obturated with gutta-percha. The apical 3 mm of each tooth was resected and 3 mm root-end preparation was made using ultrasonic tip (n = 30) and Er:YAG laser (n = 30). MTA, Biodentine, and Chitra-CPC were used to restore 10 teeth each. The samples were coated with varnish and after drying, they were immersed in Rhodamine B dye for 24 h. The teeth were then rinsed, sectioned longitudinally, and observed under confocal laser scanning microscope. Data were analyzed using one-way analysis of variance (ANOVA) and a post-hoc Tukey's test at P < 0.05 (R software version 3.1.0). Comparison of microleakage showed maximum peak value of 0.45 mm for Biodentine, 0.85 mm for MTA, and 1.05 mm for Chitra-CPC. The amount of dye penetration was found to be lesser in root ends prepared using Er:YAG laser when compared with ultrasonics, the difference was found to be statistically significant (P < 0.05). Root-end cavities prepared with Er:YAG laser and restored with Biodentine showed superior sealing ability compared to those prepared with ultrasonics.