Laser Ablation of Dental Calculus Around 400 nm Using a Ti:Sapphire Laser
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY
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 ≥2 J/cm^2; stalling occurs below this fluence because of photobleaching. Healthy hard tissue is not removed at fluences ≤3 J/cm^2.
- Research Organization:
- Laboratory for Laser Energetics, University of Rochester
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC52-08NA28302
- OSTI ID:
- 966061
- Report Number(s):
- DOE/NA/28302-898; 2008-151; 1881
- Journal Information:
- Lasers in Dentistry XV, edited by R. Rechmann and D. Fried (SPIE, Bellingham, WA, 2009), Vol. 7162, Paper 71620E., Journal Name: Lasers in Dentistry XV, edited by R. Rechmann and D. Fried (SPIE, Bellingham, WA, 2009), Vol. 7162, Paper 71620E. Vol. 7162
- Country of Publication:
- United States
- Language:
- English
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