Microleakage of two root-end filling materials in the cavities prepared by laser and ultrasonic technique: an in-vitro study

Abstract

BacKgrouNd: The present study determined the microleakage of two root-end filling materials in the cavities prepared by Er:YAG 2940 nm laser and ultrasonic techniques. MEtHods: In this in-vitro trial, 100 single-rooted teeth were prepared by ProTaper files and after having their crowns to be filled with glass-ionomer, their 3-mm root-ends were cut and the specimens were allocated to 4 groups. the root-end cavities were prepared by ultrasonic tips and Er:YAG 2940 nm laser while mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement were used as root-end filling materials. the teeth surfaces were coated by 2 layers of nail varnish up to root-end region. the leakage were subjected to one-sided analysis of variance test in 4 groups and the paired comparisons were done by tukey test. rEsults: The leakage values were 2.46±0.56 μ for ultrasonic/CEM cement group while it was 2.71±0.46 μ, 2.07±0.57 μ and 2.09±0.51 μ for the ultrasonic/MTA, laser/CEM cement and laser/MTA groups respectively. Significant differences existed among 4 groups of root-end cavity preparation techniques and root-end filling materials (P<0.0001). The effects of laser and ultrasonic to prepare root-end cavities on the leakage values were significant (P<0.0001), so that lower leakage values were noted for laser groups as compared to ultrasonic. The materials of root-end filling had no significant effect on the leakage values. coNclusIoNs: due to the decreased leakage using laser for root-end cavity preparation compared to ultrasonic tips and similar leakage values between MTA and CEM cement used as root-end filling materials, Er:YAG laser is proposed for the root-end cavity preparation and CEM cement can be used as an alternative for MTA to fill root-end cavities. However, in-vivo studies are required in this regard. Copyright © 2017 edizioni minerva medica.