Hydrodynamic model for ultra-short pulse ablation of hard dental tissue

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A computational model for the ablation of tooth enamel by ultra-short laser pulses is presented. The role of simulations using this model in designing and understanding laser drilling systems is discussed. Pulses of duration 300 fsec and intensity greater than 10{sup 12} W/cm{sup 2} are considered. Laser absorption proceeds via multi-photon initiated plasma mechanism. The hydrodynamic response is calculated with a finite difference method, using an equation of state constructed from thermodynamic functions including electronic, ion motion, and chemical binding terms. Results for the ablation efficiency are presented. An analytic model describing the ablation threshold and ablation depth is presented. ... continued below

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12 p.

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London, R.A.; Bailey, D.S.; Young, D.A.; Alley, W.E.; Feit, M.D.; Rubenchik, A.M. et al. February 29, 1996.

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A computational model for the ablation of tooth enamel by ultra-short laser pulses is presented. The role of simulations using this model in designing and understanding laser drilling systems is discussed. Pulses of duration 300 fsec and intensity greater than 10{sup 12} W/cm{sup 2} are considered. Laser absorption proceeds via multi-photon initiated plasma mechanism. The hydrodynamic response is calculated with a finite difference method, using an equation of state constructed from thermodynamic functions including electronic, ion motion, and chemical binding terms. Results for the ablation efficiency are presented. An analytic model describing the ablation threshold and ablation depth is presented. Thermal coupling to the remaining tissue and long-time thermal conduction are calculated. Simulation results are compared to experimental measurements of the ablation efficiency. Desired improvements in the model are presented.

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12 p.

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OSTI as DE96009806

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  • Photonics West `96: conference on quantum well and superlattice physics VI, San Jose, CA (United States), 27 Jan - 2 Feb 1996

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  • Other: DE96009806
  • Report No.: UCRL-JC--123108
  • Report No.: CONF-960163--24
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 226001
  • Archival Resource Key: ark:/67531/metadc667232

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Office of Scientific & Technical Information Technical Reports

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  • February 29, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 16, 2016, 7:38 p.m.

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London, R.A.; Bailey, D.S.; Young, D.A.; Alley, W.E.; Feit, M.D.; Rubenchik, A.M. et al. Hydrodynamic model for ultra-short pulse ablation of hard dental tissue, article, February 29, 1996; California. (digital.library.unt.edu/ark:/67531/metadc667232/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.