Excimer laser drilling of bone: shock wave and profile measurements

Alexander P. Sviridov; A. K. Dmitriev; Athanase D. Karoutis; P. N. Christodoulou M.D.; Emmanuel S. Helidonis M.D.

doi:10.1117/12.199202

18 January 1995 Excimer laser drilling of bone: shock wave and profile measurements

Alexander P. Sviridov, A. K. Dmitriev, Athanase D. Karoutis, P. N. Christodoulou M.D., Emmanuel S. Helidonis M.D.

Proceedings Volume 2323, Laser Interaction with Hard and Soft Tissue II; (1995) https://doi.org/10.1117/12.199202
Event: International Symposium on Biomedical Optics Europe '94, 1994, Lille, France

Abstract

The shock wave generation in stapes models during laser ear surgery is experimentally investigated. The intensity absolute measurements of shock waves generated by excimer laser in the treated bone are performed. It is shown that the roughness of the crater bottom profile depends on the laser beam fluence. It is revealed that in the pulse repetition regime of bone drilling there exists an optimal laser beam fluence, which provides as high a rate of drilling as the smooth bottom of the crater. For ArF and KrF excimer lasers the optimal fluence is equal to about 0.4 - 0.5 J/cm² at the repetition rate 5 Hz. The amplitude of shock wave induced at these parameters of laser beam in the back side of the bone sample of 1.1 mm thickness was measured to be about 25 bar and the corresponding pressure gradient 0.35 bar/micrometers .

Citation Download Citation

Alexander P. Sviridov, A. K. Dmitriev, Athanase D. Karoutis, P. N. Christodoulou M.D., and Emmanuel S. Helidonis M.D. "Excimer laser drilling of bone: shock wave and profile measurements", Proc. SPIE 2323, Laser Interaction with Hard and Soft Tissue II, (18 January 1995); https://doi.org/10.1117/12.199202

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