Analysis of Permeability and Morphology of Root Canal Dentin After Er,Cr:YSGG Laser Irradiation
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2010
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Resumo |
Objective: The aim of this study was to evaluate the morphology and permeability of root canal walls irradiated with Er,Cr:YSGG laser after conventional endodontic treatment. Background: Laser irradiation can be used for dentinal tubule exposure, smear layer removal, and disinfection. Another potential, interesting application is as an adjunct to endodontic treatment, especially in the intracanal medication phase. Methods: Fifty-two single-rooted teeth had their crowns sectioned at the cementoenamel junction and were randomly divided into four groups (n = 13): G1: conventional preparation (CP) + irrigation with EDTA-T+rhodamine B dye solution associated with NDP (dexamethasone phosphate, paramonochlorophenol, polyethylenoglycol) (Rhod-NDP); G2: CP+EDTA-T + Er,Cr:YSGG laser irradiation 0.75W+Rhod-NDP; G3: CP + EDTA-T + Er,Cr:YSGG 1.5W+Rhod-NDP; G4: CP + EDTA-T + Er,Cr:YSGG 2.5W + Rhod-NDP. For the permeability analysis (n = 9), teeth were transversely cut and two slices of each third were selected. The images were analyzed by ImageLab software (Softium Informatica Ltda., Sao Paulo, SP, Brazil). Additional samples (n = 4) were examined by scanning electron microscopy. Results: Data were analyzed statistically using the Kruskal-Wallis and Student-Newman-Keuls tests for the following areas: apical third (H = 23.4651): G1 (14.25)(a), G2 (17.66)(ab), G3 (26.50)(b), G4 (39.58)(c); medium (H = 23.1611): G1 (14.16)(a), G2 (16.66)(ab), G3 (28.83)(b), G4 (38.33)(b); and cervical (H = 32.4810): G1 (9.66)(a), G2 (20.00)(ab), G3 (27.00)(b), G4 (41.33)(c), (p<0.01). Despite the irregular aspect of laser irradiation along the canal walls, the parameters of 1.5W and 2.5W allowed morphologic modifications that increased dentinal permeability. Conclusions: Irradiation with Er, Cr: YSGG laser could be effective in endodontic treatment for increasing dentinal permeability. State of Sao Paulo Research Foundation (FAPESP)[CEPID/CEPOF 98/14270-8] State of Sao Paulo Research Foundation (FAPESP)[05/53737-4] |
Identificador |
PHOTOMEDICINE AND LASER SURGERY, v.28, n.1, p.103-108, 2010 1549-5418 http://producao.usp.br/handle/BDPI/15450 10.1089/pho.2008.2417 |
Idioma(s) |
eng |
Publicador |
MARY ANN LIEBERT INC |
Relação |
Photomedicine and Laser Surgery |
Direitos |
closedAccess Copyright MARY ANN LIEBERT INC |
Palavras-Chave | #POWERED HYDROKINETIC SYSTEM #GALLIUM-GARNET LASER #SMEAR LAYER #IN-VITRO #ENDODONTIC TREATMENT #CAVITY PREPARATION #ER-YAG #REMOVAL #ERBIUM #EFFICACY #Surgery |
Tipo |
article original article publishedVersion |