Influence of Er:YAG laser on surface treatment of aged composite resin to repair restoration


Autoria(s): ROSSATO, D. M.; BANDECA, M. C.; SAADE, E. G.; LIZARELLI, R. F. Z.; BAGNATO, Vanderlei Salvador; SAAD, J. R. C.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2009

Resumo

The purpose of this study was to investigate the effect of Er:YAG laser on surface treatment to the bond strength of repaired composite resin after aged. Sixty specimens (n = 10) were made with composite resin (Z250, 3M) and thermocycled with 500 cycles, oscillating between 5 to 55A degrees C. The specimens were randomly separated in six groups which suffered the following superficial treatments: no treatment (GI, control), wearing with diamond bur (GII), sandblasted with aluminum oxide with 27.5 A mu m particles (GIII) for 10 s, 200 mJ Er:YAG laser (GIV), 300 mJ Er:YAG laser (GV), and 400 mJ Er:YAG laser (GVI), with the last 3 groups under a 10 Hz frequency for 10 s. Restoration repair was done using the same composite. The shear test was done into the Universal testing machine MTS-810. Analyzing the results through ANOVA and Tukey test, no significant differences were found (p-value is 0.5120). Average values analysis showed that superficial treatment with aluminum oxide presented the highest resistance to shear repair interface (8.91MPa) while 400 mJ Er:YAG laser presented the lowest (6.76 MPa). Fracture types analysis revealed that 90% suffered cohesive fractures to GIII. The Er:YAG laser used as superficial treatment of the aged composite resin before the repair showed similar results when used diamond bur and sandblasting with aluminum oxide particles.

Identificador

LASER PHYSICS, v.19, n.11, p.2144-2149, 2009

1054-660X

http://producao.usp.br/handle/BDPI/29658

10.1134/S1054660X09210105

http://dx.doi.org/10.1134/S1054660X09210105

Idioma(s)

eng

Publicador

MAIK NAUKA/INTERPERIODICA/SPRINGER

Relação

Laser Physics

Direitos

restrictedAccess

Copyright MAIK NAUKA/INTERPERIODICA/SPRINGER

Palavras-Chave #ER-YAG LASER #TENSILE BOND STRENGTH #IN-VITRO #FRACTURE-TOUGHNESS #DENTAL COMPOSITES #ABLATION RATE #ENAMEL #DEGRADATION #RESISTANCE #BRACKETS #Optics #Physics, Applied
Tipo

article

original article

publishedVersion