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International Journal of Dentistry
Volume 2012, Article ID 628375, 5 pages
Research Article

Management of Root Perforations Using MTA with or without Er:YAG Laser Irradiation: An In Vitro Study

1Department of Dental Sciences, Faculty of Medicine, University of Liège, 4000 Liège, Belgium
2Unit of Ultrastructural Morphology, Laboratory of Evolutive and Functional Morphology, University of Liège, 4000 Liège, Belgium
3L'Unité de Morphologie Expérimrntale, Université Catholique de Louvain, 1200 Bruxelles, Belgium

Received 20 January 2012; Revised 9 April 2012; Accepted 11 June 2012

Academic Editor: R. De Moor

Copyright © 2012 M. Tielemans 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.


The aim of this in vitro study is to compare the microleakage of a root perforation sealed with MTA (mineral trioxide aggregate) (group M) to that sealed with MTA following Er:YAG laser irradiation (group ML). Forty-two recently extracted human monoroot teeth were used. Two cavities were prepared on each root surface. Randomly, on each root, the exposed dentine of one cavity was irradiated prior to MTA filling using an Er:YAG laser with the following settings: 200 mJ/pulses under an air water spray, 10 Hz, pulse duration of 50 μsec, and 0.7 mm beam diameter. All cavities were then sealed with MTA. submitted to thermocycling and immersed in 2% methylene blue dye solution for 12 h. The penetration of methylene blue in the microleakage of cavity was observed and recorded. The mean value dye penetration in cavities sealed with MTA following Er:YAG laser irradiation ( 2 3 . 9 1 ± 1 4 . 6 3 %) was lower than that of unlased cavities sealed only with MTA ( 2 5 . 1 7 ± 1 7 . 5 3 %). No significant difference was noted. The use of an Er:YAG laser beam for dentinal conditioning prior to MTA filling of perforated roots did not decrease significantly the microleakage of MTA sealing when compared to the conventional use of MTA filling.