Table of Contents Author Guidelines Submit a Manuscript
International Journal of Dentistry
Volume 2009, Article ID 798786, 6 pages
http://dx.doi.org/10.1155/2009/798786
Research Article

Evaluation of Root-End Resections Performed by Er, Cr: YSGG Laser with and without Placement of a Root-End Filling Material

Department of Endodontics, University of Florida, 1600 SW Archer Rd. Room no. D10-37, Gainesville, FL 32610, USA

Received 13 August 2008; Revised 27 April 2009; Accepted 29 May 2009

Academic Editor: Brian W. Darvell

Copyright © 2009 John Sullivan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Microleakage following root-end resections has a direct influence on the outcome of surgical endodontic procedures. This study compared the microleakage after root-end resections performed by the Er, Cr: YSGG laser or carbide burs with or without the placement of MTA, and evaluated the presence of microcracks and gaps at the interface of GP/MTA and the canal walls. Ninety single-rooted teeth were instrumented, obturated with GP and AH-Plus sealer, and divided into 3 experimental groups: (I) root-end resections were performed with the laser and G6 tips (parameters: 4.5 w, 30 pps, 20% water and 50% air); (II) Lindeman burs were used, without the placement of MTA; (III) the burs were used followed by root-end fillings with MTA, and one control (IV) of five unobturated roots resected with the burs. The samples were prepared for microleakage ( 𝑛 = 2 0 ) and SEM ( 𝑛 = 1 0 ) analysis. They were immersed in 1% methylene blue, decalcified, cleared, and evaluated for dye penetration ( m m 2 ) with the ImageJ software. Epoxy-resin replicas of the root-ends were analyzed by SEM for gaps ( 𝜇 m 2 ) and microcracks. Microleakage results were 0 . 5 1 8 ± 1 . 0 5 9 , 0 . 1 7 2 ± 0 . 2 2 3 , and 0 . 1 5 8 ± 0 . 2 5 3 , for the laser (I), no root-end filling (II), and MTA (III) samples, respectively, (ANOVA 𝑃 = . 0 2 ). The laser ( 7 8 3 1 . 7 ± 2 3 2 9 . 2 ) and no root-end filling ( 7 1 3 7 . 3 ± 1 4 0 0 . 7 ) samples presented gaps. Whereas, none was found in the MTA (ANOVA 𝑃 = . 0 0 2 ). Microcracks were not observed. The MTA group demonstrated statistically less leakage and better adaptation to the canal walls when compared to the other groups. There was no correlation between the size of the gaps and the degree of microleakage.