The effects of CO2 laser with or without nanohydroxyapatite paste in the occlusion of dentinal tubules.
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 (P < 0.05). 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.
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Mohammed Abbood
MA
Al-Maliky
Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Aljadriya Campus, Baghdad, Iraq.
Ali Shukur
AS
Mahmood
Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Aljadriya Campus, Baghdad, Iraq.
Tamara Sardar
TS
Al-Karadaghi
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Christoph
C
Kurzmann
Division of Dental Student Training and Patient Care, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Markus
M
Laky
Central Research Unit and Division of Conservative Dentistry, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Alexander
A
Franz
Division of Conservative Dentistry and Periodontology, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria ; Division of Dental Student Training and Patient Care, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Andreas
A
Moritz
D003804:Dentin / Q000187:drug effects / Q000473:pathology / Q000528:radiation effects; D003806:Dentin Permeability / Q000187:drug effects / Q000528:radiation effects; D017886:Durapatite / Q000008:administration & dosage*; D006801:Humans; D054020:Lasers, Gas / Q000627:therapeutic use*; D028022:Low-Level Light Therapy; D008963:Molar / Q000187:drug effects / Q000473:pathology / Q000528:radiation effects; D053758:Nanoparticles / Q000008:administration & dosage
D017886:Durapatite