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

Joshua E. Schoenly; Wolf Seka; Peter Rechmann

doi:10.1117/12.814859

23 February 2009 Laser ablation of dental calculus at 400 nm using a Ti:sapphire laser

Joshua E. Schoenly, Wolf Seka, Peter Rechmann

Proceedings Volume 7162, Lasers in Dentistry XV; 71620E (2009) https://doi.org/10.1117/12.814859
Event: SPIE BiOS, 2009, San Jose, California, United States

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.

Citation Download Citation

Joshua E. Schoenly, Wolf Seka, and Peter Rechmann "Laser ablation of dental calculus at 400 nm using a Ti:sapphire laser", Proc. SPIE 7162, Lasers in Dentistry XV, 71620E (23 February 2009); https://doi.org/10.1117/12.814859

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