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Proceedings Paper

Laser ablation of dental calculus at 400 nm using a Ti:sapphire laser
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Paper Abstract

A Nd:YAG laser-pumped, frequency-doubled Ti:sapphire laser is used for selective ablation of calculus. The laser provides ≤25 mJ at 400 nm (60-ns pulse width, 10-Hz repetition rate). The laser is coupled into an optical multimode fiber coiled around a 4-in.-diam drum to generate a top-hat output intensity profile. With coaxial water cooling, this is ideal for efficient, selective calculus removal. This is in stark contrast with tightly focused Gaussian beams that are energetically inefficient and lead to irreproducible results. Calculus is well ablated at high fluences ≥2J/cm2; stalling occurs below this fluence because of photobleaching. Healthy hard tissue is not removed at fluences ≤3 J/cm2.

Paper Details

Date Published: 24 February 2009
PDF: 8 pages
Proc. SPIE 7162, Lasers in Dentistry XV, 71620E (24 February 2009); doi: 10.1117/12.814859
Show Author Affiliations
Joshua E. Schoenly, Univ. of Rochester (United States)
Institute of Optics, Univ. of Rochester (United States)
Wolf Seka, Univ. of Rochester (United States)
Institute of Optics, Univ. of Rochester (United States)
Peter Rechmann, Univ. of California, San Francisco (United States)


Published in SPIE Proceedings Vol. 7162:
Lasers in Dentistry XV
Peter Rechmann; Daniel Fried, Editor(s)

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