7 September 1994 Optoacoustic studies of Er:YAG laser ablation in hard dental tissue
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Abstract
Optoacoustic measurements were carried out in order to obtain better understanding of the ablation mechanisms during the illumination of hard dental tissue by Er:YAG laser radiation. A broadband microphone was used to detect laser generated acoustic waves in the ambient air. Correlation analysis of the laser pulse spikes and the response of the optoacoustic probe indicates that each laser spike ablates the hard dental tissue independently of other spikes. This is in agreement with the model of ablation by means of micro explosions. The optoacoustic signal is observed to be approximately linearly related to the ablation efficiency, and is thus demonstrated to be a good measure of the ablation efficiency. The experiments also show a significant difference in optoacoustic signals obtained during ablation in caries, enamel, and dentin.
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Ladislav Grad, Janez Ivan Mozina, Dusan Sustercic, Nenad Funduk, Uros Skaleric, Matjaz Lukac, Simona Cencic, Karolj N. Nemes, "Optoacoustic studies of Er:YAG laser ablation in hard dental tissue", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184931; https://doi.org/10.1117/12.184931
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