Transient FEM calculation of the ablation of hard dental tissue induced by Er:YAG laser radiation

Hans-Jochen Foth; Manfred Lueke

doi:10.1117/12.469304

3 June 2002 Transient FEM calculation of the ablation of hard dental tissue induced by Er:YAG laser radiation

Hans-Jochen Foth, Manfred Lueke

Proceedings Volume 4610, Lasers in Dentistry VIII; (2002) https://doi.org/10.1117/12.469304
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

Abstract

Three dimensional model calculations using Finite Elements were carried out to simulate the heat distribution under IR laser ablation. The thermodynamic constants of dentin were used for heat capacity, heat conductivity etc. Compared to earlier results, the anisotropy of these constants is now considered; i.e. the heat conduction for example is not necessarily independent of the direction but depends on the orientation of the inner structure of the dental tissue. While the results of CO₂ laser ablation were discussed last year, new calculations have been performed for the optical constant of dentin at a wavelength of 2.9 micrometers . Since the penetration length of 2.9 micrometers radiation is significantly shorter than that of 10.6 micrometers , the thermally influenced zone around the laser crater is thinner.

Citation Download Citation

Hans-Jochen Foth and Manfred Lueke "Transient FEM calculation of the ablation of hard dental tissue induced by Er:YAG laser radiation", Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); https://doi.org/10.1117/12.469304

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