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Effect of the Nd:YAG laser on sealer penetration into root canal surfaces: a confocal microscope analysis

Montero-Miralles, Paloma, Castillo-Oyagüe, Raquel, de la Fuente, Isabel Sáez, Lynch, Christopher, Castillo-Dalí, Gabriel and Torres-Lagares, Daniel 2014. Effect of the Nd:YAG laser on sealer penetration into root canal surfaces: a confocal microscope analysis. Journal of Dentistry 42 (6) , pp. 753-759. 10.1016/j.jdent.2014.03.017

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Objectives: The objective of this in vitro study was to evaluate the use of the Neodymium:Yttrium-Aluminium-Garnet (Nd:YAG) laser as part of the root canal treatment on the penetration of sealer into dentinal tubules. Methods: Eighty extracted lower premolars were randomly assigned to two groups (n = 40 each): Control group (CG), subjected to a conventional protocol of endodontic instrumentation and obturation; and Laser group (LG), in which Nd:YAG laser irradiations were combined with conventional preparation and obturation. Endodonted samples were sectioned at 3 and 5 mm from the apex and observed under a confocal scanning microscope (CLSM). The penetration depth into the dentinal tubules and the extension of the intracanal perimeter infiltrated by sealer were measured. The Student–Newman–Keuls test was run for between-group comparisons (α = .05). Results: The depth of sealer penetration into dentinal tubules did not differ among groups. LG samples showed the significantly highest percentage of penetrated perimeter at 3 mm from the root apex. Within each group, the greatest depth of penetration (P = .0001), and the major percentage of penetrated perimeter (P < .001), were recorded at 5 mm. Conclusions: The application of the Nd:YAG laser after instrumentation did not improve the depth of sealer penetration into the dentinal tubules. The laser enlarged the total penetrable perimeter near the apex. Clinical significance: The Nd:YAG laser may be an appropriate complement in root canal treatment, as it enhances the sealer adaptation to the dentinal walls in the proximity of the apex.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Dentistry
Subjects: R Medicine > RK Dentistry
Publisher: Elsevier
ISSN: 0300-5712
Date of Acceptance: 30 March 2014
Last Modified: 11 Oct 2019 13:36

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