Influence of Nd:YAG laser on the penetration of a bioceramic root canal sealer into dentinal tubules: A confocal analysis

The aim of this in vitro study, is to evaluate the penetration of a bioceramic root canal sealer into dentinal tubules at 3 mm and 5 mm from the apex after Nd:YAG laser irradiation. Forty freshly extracted human mandibular premolars were prepared using Reciproc® and irrigated with 17% ethylenediamin...

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Bibliographic Details
Published in:	PloS one Vol. 13; no. 8; p. e0202295
Main Authors:	Jardim Del Monaco, Rodrigo, Tavares de Oliveira, Marcelo, de Lima, Adriano Fonseca, Scarparo Navarro, Ricardo, Zanetti, Raquel Virgínia, de Fátima Teixeira da Silva, Daniela, Horliana, Anna Carolina Ratto Tempestini
Format:	Journal Article
Language:	English
Published:	United States Public Library of Science 22-08-2018 Public Library of Science (PLoS)
Subjects:	Acetic acid Analysis Bicuspid - pathology Bicuspid - radiation effects Bioceramics Biology and Life Sciences Bond strength Canals Confocal microscopy Dental Pulp Cavity - pathology Dental Pulp Cavity - radiation effects Dentin Dentistry Endodontics Engineering and Technology Ethylenediaminetetraacetic acids Health aspects Health sciences Humans In Vitro Techniques Irradiation Lasers Lasers, Solid-State Mandible Materials Testing Medicine and Health Sciences Microscopy Microscopy, Confocal Nd-YAG lasers Neodymium lasers Penetration Physical Sciences Premolars Research and Analysis Methods Root Canal Filling Materials - radiation effects Root Canal Therapy Root canals Scanning microscopy Sealers Sealing compounds Semiconductor lasers Teeth Tubules YAG lasers Zinc Oxide-Eugenol Cement - radiation effects Brazil Monaco
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Summary:	The aim of this in vitro study, is to evaluate the penetration of a bioceramic root canal sealer into dentinal tubules at 3 mm and 5 mm from the apex after Nd:YAG laser irradiation. Forty freshly extracted human mandibular premolars were prepared using Reciproc® and irrigated with 17% ethylenediaminetetraacetic acid (EDTA). Teeth were divided into 4 groups: group 1, obturated with control sealer (AH Plus®); group 2, obturated with bioceramic sealer (Endosequence BC Sealer®); group 3, Nd:YAG laser + control sealer (AH Plus®); and group 4, Nd:YAG laser + bioceramic sealer (Endosequence BC Sealer®). The samples were transversely sectioned 3 mm and 5 mm from the apex and examined using confocal laser scanning microscopy. Two parameters were measured: 1) sealer penetration into dentinal tubules of the root canal and 2) sealer penetration into the perimeter of the root canal walls. Penetration analysis showed that bioceramic sealer had a higher penetration at depths of 3 and 5 mm than that of the control sealer, regardless of laser use (p <0.05). Perimeter analysis showed that there was no difference between both sealers at a depth of 3 mm (p <0.05), regardless of laser use. At a depth of 5 mm, bioceramic sealer and laser showed a greater perimeter of penetration (p <0.05) than the control sealer. The use of Nd:YAG laser did not compromise the penetration of bioceramic sealer into dentinal tubules of root canals at 3 mm and 5 mm from the apex.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Competing Interests: The authors have declared that no competing interests exist. These authors also contributed equally to this work.
ISSN:	1932-6203 1932-6203
DOI:	10.1371/journal.pone.0202295