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Proceedings Paper

Measurements of the recoil momentum and the velocity of ablation products after CO2-laser exposure
Author(s): Dirk H. Meyer; Adriaen Postel; Hans-Jochen Foth
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Paper Abstract

Using the pendulum method the recoil momentum on dentin samples after pulsed irradiation (pulselength 80 - 100 microsecond(s) ) with a medical CO2-laser (Sharplan 40C, 10.6 micrometers ) was measured. Therefore a Laser-Doppler-vibrometer was used to deliver the velocity and the direction of movement. Because of known masses of the samples and measurement of the ablated masses the velocity of the ablated particles was calculated. As a second method to measure the velocity of the ablated particles the vibrometer was used in a time of flight experiment. Both methods delivered the same results at a mean power of 0.5 Watt. The velocity of the ablated particles was 50 - 60 m/s. At higher mean powers the thermal behavior of the tooth material leads to higher velocities.

Paper Details

Date Published: 22 December 1997
PDF: 8 pages
Proc. SPIE 3192, Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy, (22 December 1997); doi: 10.1117/12.297865
Show Author Affiliations
Dirk H. Meyer, Univ. of Kaiserslautern (Germany)
Adriaen Postel, Univ. of Kaiserslautern (Germany)
Hans-Jochen Foth, Univ. of Kaiserslautern (Germany)


Published in SPIE Proceedings Vol. 3192:
Medical Applications of Lasers in Dermatology, Ophthalmology, Dentistry, and Endoscopy
Gregory B. Altshuler; Reginald Birngruber; Marco Dal Fante; Raimund Hibst; Herbert Hoenigsmann; Neville Krasner; Frederic Laffitte, Editor(s)

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