Dentin adhesive tensile strength after Nd:YAG laser application

Rosane F. Z. Lizarelli D.D.S.; Walter Gomes Miranda Jr.; Carlos de Paula Eduardo

doi:10.1117/12.348334

19 May 1999 Dentin adhesive tensile strength after Nd:YAG laser application

Rosane F. Z. Lizarelli D.D.S., Walter Gomes Miranda Jr., Carlos de Paula Eduardo

Proceedings Volume 3593, Lasers in Dentistry V; (1999) https://doi.org/10.1117/12.348334
Event: BiOS '99 International Biomedical Optics Symposium, 1999, San Jose, CA, United States

Abstract

The authors evaluated, in vitro, the tensile strength of a hydrophilic adhesive on dentin surface, with and without previous treatment with high power Nd:YAG laser. Power of 1.0 W and 2.0 W with respective frequencies of 25 Hz and 50 Hz were used. Thirteen human extracted molars were prepared and randomly separated in five groups: GI, Nd:YAG laser with 1.0 W plus SBMPP (3M) adhesive system; GII, laser with 2.0 W, plus adhesive system; GIII, laser with 1.0 W; GIV, laser with 2.0 W; GV, adhesive system to treat dentin surface. To each group five samples with a composite bottom each, totalling in 25 samples, which were kept in distilled water, by 37°C, during 30 days. After that, thermal cycling was applied. After this period, the samples were submitted the tensile strength test to evaluate the necessary threshold of power to break up the adhesive bond of composite button from dentin surface. The statistical evaluation was done through variance analysis. Results showed that the values of tensile strength of the GV (26.4 kgf/cm²) were better than GI (4.6 kgf/cm²) which was the best laser group: GIII (2.4 kgf/cm²); GII (1.7 kgf/cm²) and GIV (1.2 kgf/cm²).

Citation Download Citation

Rosane F. Z. Lizarelli D.D.S., Walter Gomes Miranda Jr., and Carlos de Paula Eduardo "Dentin adhesive tensile strength after Nd:YAG laser application", Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); https://doi.org/10.1117/12.348334

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