The Effects of CO2 Laser with or without Nanohydroxyapatite Paste in the Occlusion of Dentinal TubulesReportar como inadecuado




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The Scientific World Journal - Volume 2014 2014, Article ID 798732, 8 pages -

Research Article

Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria

Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Aljadriya Campus, Baghdad, Iraq

Division of Dental Student Training and Patient Care, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria

Central Research Unit and Division of Conservative Dentistry, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria

Received 29 July 2014; Accepted 12 September 2014; Published 20 October 2014

Academic Editor: Romeo Umberto

Copyright © 2014 Mohammed Abbood Al-maliky 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.

Abstract

The aim of this study was to evaluate a new treatment modality for the occlusion of dentinal tubules DTs via the combination of 10.6 µm carbon dioxide CO2 laser and nanoparticle hydroxyapatite paste n-HAp. Forty-six sound human molars were used in the current experiment. Ten of the molars were used to assess the temperature elevation during lasing. Thirty were evaluated for dentinal permeability test, subdivided into 3 groups: the control group C, laser only L−, and laser plus n-HAp L+. Six samples, two per group, were used for surface and cross section morphology, evaluated through scanning electron microscope SEM. The temperature measurement results showed that the maximum temperature increase was 3.2°C. Morphologically groups L− and L+ presented narrower DTs, and almost a complete occlusion of the dentinal tubules for group L+ was found. The Kruskal-Wallis nonparametric test for permeability test data showed statistical differences between the groups . For intergroup comparison all groups were statistically different from each other, with group L+ showing significant less dye penetration than the control group. We concluded that CO2 laser in moderate power density combined with n-HAp seems to be a good treatment modality for reducing the permeability of dentin.





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Fuente: https://www.hindawi.com/



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