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Proceedings Paper

Dentin adhesive tensile strength after Nd:YAG laser application
Author(s): Rosane F. Z. Lizarelli; Walter Gomes Miranda; Carlos de Paula Eduardo
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Paper 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).

Paper Details

Date Published: 19 May 1999
PDF: 6 pages
Proc. SPIE 3593, Lasers in Dentistry V, (19 May 1999); doi: 10.1117/12.348334
Show Author Affiliations
Rosane F. Z. Lizarelli, Univ. of Sao Paulo (Brazil)
Walter Gomes Miranda, Univ. of Sao Paulo School of Dentistry (Brazil)
Carlos de Paula Eduardo, Univ. of Sao Paulo School of Dentistry (Brazil)

Published in SPIE Proceedings Vol. 3593:
Lasers in Dentistry V
John D. B. Featherstone; Peter Rechmann; Daniel Fried, Editor(s)

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