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Proceedings Paper

Effects of the pulsed fiberoptic-delivered Nd:YAG laser on dentin bonding
Author(s): Joel M. White D.D.S.; Harold E. Goodis D.D.S.; Paul Khosrovi D.D.S.; Chris M. Rose D.D.S.
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Paper Abstract

Laser modification of the dentin may increase the mechanical retention of composite resin restorations. The purpose of this study was to evaluate the effect of the Nd:YAG laser on dentin bonding. 170 dentin specimens were prepared by horizontal sectioning through the middle coronal third of molars. A 5 mm area of 140 samples were treated at powers of 0.3 to 3.0 W, pulse frequencies of 10 to 30 Hz, and energies of 30 to 150 mJ/pulse. The remaining 30 were untreated dentin sections. Samples were pumiced and bonded with Scotchbond 2 and Silux Plus composite, then light cured and stored at 100% humidity for 24 hours prior to debonding. Shear bond strength was measured and the type of failure was determined. Laser modification of the dentin improved bond strength by 68% compared with the controls. Microscopic examination of the lased samples after debonding showed that 5% failed adhesively at the dentin-resin interface, while 95% failed cohesively within the resin. Therefore, lasers increased dentin bond strengths by improving micromechanical retention.

Paper Details

Date Published: 23 April 1996
PDF: 10 pages
Proc. SPIE 2672, Lasers in Dentistry II, (23 April 1996); doi: 10.1117/12.238760
Show Author Affiliations
Joel M. White D.D.S., Univ. of California/San Francisco (United States)
Harold E. Goodis D.D.S., Univ. of California/San Francisco (United States)
Paul Khosrovi D.D.S., Univ. of California/San Francisco (United States)
Chris M. Rose D.D.S., Univ. of California/San Francisco (United States)

Published in SPIE Proceedings Vol. 2672:
Lasers in Dentistry II
Harvey A. Wigdor D.D.S.; John D. B. Featherstone; Joel M. White D.D.S.; Joseph Neev, Editor(s)

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