Dentinal tubules sealing by means of diode lasers (810 and 980 nm): A preliminary in vitro study

Continuous mode; Dentinal tubules; Energy density; Measurements of; Non-contact mode; Optical fiber diameters; Pulp temperature; Scanning electron microscopic; Graphite; Irradiation; Optical fibers; Thermocouples; Semiconductor lasers; Adolescent; Adult; Dentin; Dentin Sensitivity; Humans; Lasers, Semiconductor

Abstract :

[en] Objective: The aim of this study was to evaluate the effect on dentinal surfaces of diode lasers (810 and 980 nm) at different parameters. Materials and methods: Twenty-four caries-free human impacted wisdom teeth were used. The crowns were sectioned transversely in order to expose the dentin. The smear layer was removed by a 1 min application of ethylenediaminetetraacetic acid (EDTA). Each surface was divided into four quadrants irradiated at a different output power setting for each kind of laser: 0.8, 1, 1.6, and 2 W (energy densities: 2547, 3184, 5092, and 6366 J/cm2, irradiation speed 1 mm/sec; optical fiber diameter: 200 μm; continuous and noncontact mode). Half of the samples were stained with a graphite paste. All specimens were sent for scanning electron microscopic (SEM) analysis. Pulp temperature increases in additional 20 teeth were measured by a thermocouple. Results: Diode laser irradiations at 0.8 and 1 W led to occlusion or narrowing of dentin tubules without provoking fissures or cracks. The application of graphite paste increased the thermal effects in dentin. Measurements of pulp temperature showed that irradiations at 0.8 and 1 W for a period of 10 sec in continuous mode increased pulp temperature (T ≤2 C). Conclusions: Diode lasers (810 and 980 nm) used at 0.8 and 1 W for 10 sec in continuous mode were able to seal the dentin tubules. These parameters can be considered harmless for pulp vitality, and may be effective in the treatment of dentinal hypersensitivity. © Copyright 2013, Mary Ann Liebert, Inc. 2013.

Disciplines :

Dentistry & oral medicine

Author, co-author :

Umana, M.; Department of Dental Sciences, Faculty of Medicine, University of Liège, Quai Godfroid Kurth, Liège, Belgium

Heysselaer, D.; Department of Dental Sciences, Faculty of Medicine, University of Liège, Quai Godfroid Kurth, Liège, Belgium

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

Zeinoun, T.; Department of Dental Sciences, Faculty of Medicine, University of Liège, Quai Godfroid Kurth, Liège, Belgium

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

Tielemans, Marc

Language :

English

Title :

Dentinal tubules sealing by means of diode lasers (810 and 980 nm): A preliminary in vitro study

Publication date :

2013

Journal title :

Photomedicine and Laser Surgery

ISSN :

1549-5418

eISSN :

1557-8550

Publisher :

Mary Ann Liebert, United States - New York

Volume :

Issue :

Pages :

307-314

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 July 2014

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