Influence of sodium hypochlorite on Er:YAG Laser-irradiated dentin and its effect on the quality of adaptation of the composite restoration margins

LAHMOUZI, Jamila; Farache, M.; Umana, M.; Compère, Philippe; Nyssen-Behets, C.; Namour, Samir

doi:10.1089/pho.2012.3249

Article (Scientific journals)

Influence of sodium hypochlorite on Er:YAG Laser-irradiated dentin and its effect on the quality of adaptation of the composite restoration margins

LAHMOUZI, Jamila; Farache, M.; Umana, M. et al.

2012 • In Photomedicine and Laser Surgery, 30 (11), p. 655-662

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/170430

DOI
10.1089/pho.2012.3249

PubMed
23075147

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Keywords :

Beam diameters; Composite restorations; Control groups; Dentin bonding; Dye penetration; Er:YAG lasers; Four-group; Human molars; In-vitro; Lower bond strength; Marginal quality; Methylene Blue; Microleakage; Scanning Electron Microscope; Sodium hypochlorites; Square pulse; Tissue layers; Two-cavity; Aromatic compounds; Bonding; Erbium; Irradiation; Scanning electron microscopy; Tissue; Quality control; CeramX; Adaptation, Physiological; Composite Resins; Dental Bonding; Dentin; Dentin-Bonding Agents; Humans; Lasers, Solid-State; Microscopy, Electron, Scanning; Molar; Sodium Hypochlorite

Abstract :

[en] Objective: The aims of this in vitro study were to evaluate: (1) the influence of 5% NaOCl application on Er:YAG-irradiated dentin; and (2) its effect on the quality of adaptation of the composite restoration margins. Background data: Previous research has shown that Er:YAG dentin irradiation produces a thermally affected tissue layer that results in lower bond strength than that of nonirradiated dentin. The removal of this thermally-affected layer may enhance the quality of dentin bonding Materials and methods: Forty-nine caries-free extracted human molars were transversely sectioned in order to totally expose the dentin. Four standardized cavities were created on the dentinal surface of each molar. First, two cavities were irradiated with Er:YAG laser (2.94 nm): 150 mJ, 10 Hz, variable square pulse (VSP) mode (100 μsec), beam diameter=0.9 mm, speed of irradiation=1 mm/sec, 20% air and 20% water. Then, one of irradiated cavities and one of nonirradiated cavities were treated for 30 sec with 5% NaOCl solution. Finally, they went through a standard bonding treatment for composite restoration, etching, bonding, and composite filling. We obtained four groups of cavities: (1) one control group of nonirradiated cavities not pretreated with NaOCl; (2) one group of nonirradiated cavities, pretreated with NaOCl; (3) one group of irradiated cavities, not pretreated with NaOCl; and (4) one group of irradiated cavities, pretreated with NaOCl. All samples were subjected to thermocycling. Every cavity was immersed into a 0.5% solution of methylene blue. The percentage of dye penetration (microleakage) in the composite-dentin interface was evaluated. Six molars were analyzed by scanning electron microscope. Results: Dye infiltration depth was significantly reduced in irradiated cavities treated with 5% NaOCl solution. Conclusions: The application of a 5% NaOCl solution on Er:YAG irradiated cavities can significantly improve the marginal quality of composite bonding. © Copyright 2012, Mary Ann Liebert, Inc. 2012.

Disciplines :

Dentistry & oral medicine

Author, co-author :

LAHMOUZI, Jamila ; Centre Hospitalier Universitaire de Liège - CHU > Médecine dentaire

Farache, M.; Department of Dental Sciences, Faculty of Medicine, University of Liège, 27, avenue des Platanes, Liège, Belgium

Umana, M.; Department of Dental Sciences, Faculty of Medicine, University of Liège, 27, avenue des Platanes, Liège, Belgium

Compère, Philippe ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Département de Biologie, Ecologie et Evolution

Nyssen-Behets, C.; Experimental Morphology Unit, Université Catholique de Louvain, Brussels, Belgium

Namour, Samir ; Université de Liège - ULiège > Département de sciences dentaires > Département de sciences dentaires

Language :

English

Title :

Influence of sodium hypochlorite on Er:YAG Laser-irradiated dentin and its effect on the quality of adaptation of the composite restoration margins

Publication date :

2012

Journal title :

Photomedicine and Laser Surgery

ISSN :

1549-5418

eISSN :

1557-8550

Publisher :

Mary Ann Liebert, United States - New York

Volume :

Issue :

Pages :

655-662

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 July 2014

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