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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rizzante, Fabio A. P. Maenosono, Rafael M. Duarte, Marco A. H. Furuse, Adilson Y. Palma-Dibb, Regina G. Ishikiriama, Sérgio K. |
| Description | Country affiliation: Brazil Author Affiliation: Rizzante FA ( Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.); Maenosono RM ( Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.); Duarte MA ( Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.); Furuse AY ( Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.); Palma-Dibb RG ( Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo.); Ishikiriama SK ( Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, São Paulo, Brazil.) |
| Abstract | BACKGROUND: Dentin hypersensitivity treatments are based on the physical obliteration of the dentinal tubules to reduce hydraulic conductance. The aim of the present study is to evaluate the hydraulic conductance of bovine root dentin after irradiation with a 980-nm diode laser, with or without associated fluoride varnish. METHODS: Sixty bovine root dentin specimens were divided into six groups (n = 10 in each group): G1, G3, and G5 (0.5 W, 0.7 W, and 1 W diode laser, respectively); G2, G4, and G6 (fluoride varnish application + 0.5 W, 0.7 W, and 1 W diode laser, respectively). The dentin hydraulic conductance was evaluated at four time periods with a fluxmeter: 1) with smear layer, 2) after 37% phosphoric acid etching, 3) after the treatments, and 4) after 6% citric acid challenge. After the dentinal fluid flow measurements, specimens were also evaluated for mineral composition using energy dispersive X-ray spectroscopy (EDS). RESULTS: Analysis demonstrated a better result with increased irradiation power (P < 0.001), especially if the diode laser irradiation was associated with the application of fluoride varnish (P < 0.001), ensuring a greater reduction in permeability. Considering the groups treated only with laser irradiation, the 1 W group was superior when compared with the 0.5 W and 0.7 W irradiated groups immediately after treatment (P < 0.001). After citric acid testing, all groups showed similar results, except when comparing the 1 W groups with the 0.5 W groups (P = 0.04). EDS results of the irradiated groups showed an increase in the proportion of calcium and phosphorus ions, which demonstrates a superficial composition modification after laser treatments. CONCLUSION: Laser irradiation of exposed dentin promoted significant reduction in the dentin hydraulic conductance, mainly with higher energy densities and association with fluoride varnish. |
| File Format | HTM / HTML |
| ISSN | 00223492 |
| Issue Number | 3 |
| Journal | Journal of Periodontology |
| Volume Number | 87 |
| e-ISSN | 19433670 |
| Language | English |
| Publisher | American Academy of Periodontology |
| Publisher Date | 2016-03-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Dentistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Periodontics |
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