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  • Effects of pulsed CO2 and Er:YAG lasers on enamel and dentin
    Lukač, Matjaž ...
    Enamel and dentin samples were exposed extraorally to pulsed TEA CO2 lasers with pulse durations of 1 microsec and 0.1 microsec. The ablation rate is for energy densities above 5 J/cm2 independent of ... the CO2 laser enrgy. For 1 micros long CO2 pulses the ablation rate is 3 microm/pulse for drilling in enamel, and 8 microm/ pulse for drilling in dentin. Drilling with 0.1 micros CO2 laser results in lower ablation rates of approximately 1 microm/pulse in enamel, and 4 microm/pulse in dentin. At all experimental energy densities plasma formation is observed, effectively reducing the amount of energy deposition. Compared with these results, experiments with the Er:YAG laser show that 200 micros long Er:YAG laser pulses achieve better ablation in the hihg energy density range because ablation is not diminished as rapidly by the plasma formation. The Er:YAG laser saturated ablation rates are approximately 60 microm/pulse for drilling in dentin and 40 microm/pulse for drilling in enamel.
    Vir: Biomedical optoelectronic instrumentation : proceedings : Photonics West '95, San Jose, 4-10 February 1995 (Str. 169-175)
    Vrsta gradiva - prispevek na konferenci
    Leto - 1993
    Jezik - angleški
    COBISS.SI-ID - 3258585

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