Influence of pulse repetition rate of Er : YAG laser and dentin depth on tensile bond strength of dentin-resin interface


Autoria(s): GONCALVES, Mariane; CORONA, Silmara Aparecida Milori; PALMA-DIBB, Regina Guenka; PECORA, Jesus Djalma
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2008

Resumo

The study evaluated the in vitro influence of pulse-repetition rate of Er:YAG laser and dentin depth on tensile bond strength of dentin-resin interface. Dentin surfaces of buccal or lingual surfaces from human third molars were submitted to tensile test in different depths (superficial, 1.0 and 1.5 mm) of the same dental area, using the same sample. Surface treatments were acid conditioning solely (control) and Er:YAG laser irradiation (80 mJ) followed by acid conditioning, with different pulse-repetition rates (1, 2, 3, or 4 Hz). Single bond/Z-250 system was used. The samples were stored in distilled water at 37 degrees C for 24 h, and then the first test (superficial dentine) was performed. The bond failures were analyzed. Following, the specimens were identified, grounded until 1.0- and 1.5-mm depths, submitted again to the treatments and to the second and, after that, to third-bond tests on a similar procedure and failure analysis. ANOVA and Tukey test demonstrated a significant difference (p < 0.001) for treatment and treatment X depth interaction (p < 0.05). The tested depths did not show influence (p > 0.05) on the bond strength of dentin-resin interface. It may be concluded that Er:YAG laser with 1, 2, 3, or 4 Hz combined with acid conditioning did not increase the resin tensile bond strength to dentin, regardless of dentin depth. (C) 2007 Wiley Periodicals, Inc.

Identificador

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A, v.86A, n.2, p.477-482, 2008

1549-3296

http://producao.usp.br/handle/BDPI/26383

10.1002/jbm.a.31636

http://dx.doi.org/10.1002/jbm.a.31636

Idioma(s)

eng

Publicador

WILEY-LISS

Relação

Journal of Biomedical Materials Research Part A

Direitos

restrictedAccess

Copyright WILEY-LISS

Palavras-Chave #dentin #Er : YAG laser #tensile bond strength #dentin depth #surface treatment #ADHESIVE SYSTEMS #PREPARED DENTIN #ERYAG LASER #COMPOSITE #SUBSTRATE #PERMEABILITY #ENAMEL #Engineering, Biomedical #Materials Science, Biomaterials
Tipo

article

original article

publishedVersion