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Proceedings Paper

Adhesion studies on dental enamel surfaces irradiated by a rapidly scanned carbon dioxide laser
Author(s): Kwang K. Chang; Michal Staninec; Kenneth H. Chan; Daniel Fried
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Paper Abstract

In this study, we investigated the influence of different laser scanning patterns on the adhesive strength of laser irradiated enamel surfaces both with and without post ablation acid etching. Previous studies of dental enamel surfaces ablated by a rapidly scanned carbon dioxide laser indicated that the highly uniform smooth surfaces produced by the scanned laser beam yielded low bond strength and acid etching was required in order to attain a high bond strength. However, since the enamel surface after ablation by CO2 lasers is more resistant to acid dissolution it is desirable to avoid acid etching before bonding. The overlap between adjacent laser spots was varied to modify the effective surface roughness. In addition, small retention holes were drilled at higher laser intensity with varying spacing to increase the adhesive strength without acid etching. Varying the degree of overlap between adjacent laser spots did not significantly influence the bond strength with post ablation acid etching. The bond strength was significantly higher without acid etching with retention holes spaced 250-μm apart.

Paper Details

Date Published: 18 February 2011
PDF: 6 pages
Proc. SPIE 7884, Lasers in Dentistry XVII, 78840S (18 February 2011); doi: 10.1117/12.878892
Show Author Affiliations
Kwang K. Chang, Univ. of California, San Francisco (United States)
Michal Staninec, Univ. of California, San Francisco (United States)
Kenneth H. Chan, Univ. of California, San Francisco (United States)
Daniel Fried, Univ. of California, San Francisco (United States)


Published in SPIE Proceedings Vol. 7884:
Lasers in Dentistry XVII
Peter Rechmann; Daniel Fried, Editor(s)

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