Particle characteristics of different materials after ultra-short pulsed laser (USPL) irradiation

Meister, Jörg; Schelle, Florian; Kowalczyk, Philip; Frentzen, Matthias

doi:10.1117/12.910181

Cited by 1 publication

(3 citation statements)

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“…These could be nanoparticles, which were already captured and observed after USPL irradiation of dentin-like material with a fluence of about 5 J∕cm 2 . 19 These nanoparticles might arise from the condensing and solidifying gas-liquid mixture, which was created in the excited region.…”

Section: Origin Of Nanoparticlesmentioning

confidence: 99%

“…Particles in the micrometer and especially in the nanometer range are unalterable. 19 We will do further investigations to determine if an additional water spray and a suction is sufficient to avoid deposition of nanoparticles on the oral mucosa.…”

Section: Consequences For the Application Of Uspl In Dentistrymentioning

confidence: 99%

“…Recent investigations showed that nano-and microparticles up to a size of 30 μm are ejected after irradiation with USPL. 19 For a deeper understanding of the nature of these nano-and microparticle generation during the ablation process, a timeresolved investigation is necessary. For this purpose, pumpprobe microscopy, a method that was already used to study the ablation stages of metals, 20,21 semiconductors, 20,22 dielectrics, 23 or thin film systems, 24 is utilized in this study to investigate the driving mechanism of nano-and microparticle formation during USPL ablation of dentin-like ivory.…”

Section: Introductionmentioning

confidence: 99%

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Time-resolved microscopy reveals the driving mechanism of particle formation during ultrashort pulse laser ablation of dentin-like ivory

et al. 2015

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In dental health care, the application of ultrashort laser pulses enables dental tissue ablation free from thermal side effects, such as melting and cracking. However, these laser types create undesired micro- and nanoparticles, which might cause a health risk for the patient or surgeon. The aim of this study was to investigate the driving mechanisms of micro- and nanoparticle formation during ultrashort pulse laser ablation of dental tissue. Time-resolved microscopy was chosen to observe the ablation dynamics of mammoth ivory after irradiation with 660 fs laser pulses. The results suggest that nanoparticles might arise in the excited region. The thermal expansion of the excited material induces high pressure in the surrounding bulk tissue, generating a pressure wave. The rarefaction wave behind this pressure wave causes spallation, leading to ejection of microparticles.

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Section: Origin Of Nanoparticlesmentioning

confidence: 99%

Section: Consequences For the Application Of Uspl In Dentistrymentioning

confidence: 99%