Research Papers: Therapeutic

Short-pulse Er:YAG laser increases bond strength of composite resin to sound and eroded dentin

[+] Author Affiliations
Maria Cecília Pereira Cersosimo, Adriana Bona Matos, Roberta Souza D’Almeida Couto, Márcia Martins Marques, Patricia Moreira de Freitas

University of Sao Paulo, Department of Operative Dentistry, School of Dentistry, Av Prof. Lineu Prestes, 2227, 05508-000, Sao Paulo, SP, Brazil

J. Biomed. Opt. 21(4), 048001 (Apr 18, 2016). doi:10.1117/1.JBO.21.4.048001
History: Received January 28, 2016; Accepted March 24, 2016
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Abstract.  This study evaluated the influence of the irradiation with a short-pulse Er:YAG laser on the adhesion of composite resin to sound and eroded dentin (SD and ED). Forty-six samples of occlusal dentine, obtained from human molars, had half of their surface protected, while the other half was submitted to erosive cycles. Afterward, 23 samples were irradiated with Er:YAG laser, resulting in four experimental groups: SD, sound irradiated dentine (SID—Er:YAG, 50  μs, 2 Hz, 80 mJ, and 12.6  J/cm2), ED, and eroded irradiated dentin (EID—erosion + Er:YAG laser). A self-etching adhesive system was used, and then cylinders of composite resin were prepared. A microshear bond strength test was performed after 24 h storage (n=20). The morphology of SD and ED, with or without Er:YAG laser irradiation, was evaluated under scanning electron microscopy (n=3). Bond strength values (MPa) were subjected to analysis of variance followed by Tukey’s test. Statistically significant differences were found among the experimental groups: SD (9.76±3.39  B), SID (12.77±5.09A), ED (5.12±1.72D), and EID (7.62±3.39C). Even though erosion reduces the adhesion to dentin, the surface irradiation with a short-pulse Er:YAG laser increases adhesion to both ED and SD.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Maria Cecília Pereira Cersosimo ; Adriana Bona Matos ; Roberta Souza D’Almeida Couto ; Márcia Martins Marques and Patricia Moreira de Freitas
"Short-pulse Er:YAG laser increases bond strength of composite resin to sound and eroded dentin", J. Biomed. Opt. 21(4), 048001 (Apr 18, 2016). ; http://dx.doi.org/10.1117/1.JBO.21.4.048001


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