Effects of the pulsed fiberoptic-delivered Nd:YAG laser on dentin bonding

Joel M. White D.D.S.; Harold E. Goodis D.D.S.; Paul Khosrovi D.D.S.; Chris M. Rose D.D.S.

doi:10.1117/12.238760

23 April 1996 Effects of the pulsed fiber-optic-delivered Nd:YAG laser on dentin bonding

Joel M. White D.D.S., Harold E. Goodis D.D.S., Paul Khosrovi D.D.S., Chris M. Rose D.D.S.

Proceedings Volume 2672, Lasers in Dentistry II; (1996) https://doi.org/10.1117/12.238760
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Joel M. White D.D.S., Harold E. Goodis D.D.S., Paul Khosrovi D.D.S., and Chris M. Rose D.D.S. "Effects of the pulsed fiber-optic-delivered Nd:YAG laser on dentin bonding", Proc. SPIE 2672, Lasers in Dentistry II, (23 April 1996); https://doi.org/10.1117/12.238760

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