Hard-tissue ablation with pulsed CO2 lasers

Thomas P. Ertl; Gerhard J. Mueller

doi:10.1117/12.148321

21 July 1993 Hard-tissue ablation with pulsed CO₂ lasers

Thomas P. Ertl, Gerhard J. Mueller

Proceedings Volume 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II; (1993) https://doi.org/10.1117/12.148321
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

CO₂ Lasers at (lambda) equals 9.6 and 10.6 micrometers and pulse lengths in the range of 100 ns to 150 micrometers operating in multimode were used as a drilling instrument with energy densities up to 200 J/cm². The laser light was focused perpendicularly onto the surface of 1 mm slices of dentin and enamel. Different methods of cooling were applied. Temperatures were measured during ablation with thermocouples. The quality of ablation was checked with a stereo microscope and the diameters of the ablated areas were measured. Ablation rates (mm³/s) and ablation efficiencies (mm³/J) were calculated. Best results were obtained with pulse lengths of 100 to 130 micrometers . Ablation without carbonization of the organic matrix of dentin was only possible with water or water/air spray cooling. Ablation rates of up to 0.2 mm³/s and an ablation efficiency of up to 50 X 10^-3 mm³/J were reached.

Citation Download Citation

Thomas P. Ertl and Gerhard J. Mueller "Hard-tissue ablation with pulsed CO₂ lasers", Proc. SPIE 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II, (21 July 1993); https://doi.org/10.1117/12.148321

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