Infrared laser ablation of dental enamel: influence of an applied water layer on ablation rate and peripheral damage

2001 ◽  
Author(s):  
Nahal Ashouri ◽  
Ramesh K. Shori ◽  
Jason M. Cheung ◽  
Daniel Fried
Keyword(s):  
Laser Ablation ◽  
Dental Enamel ◽  
Water Layer ◽  
Ablation Rate ◽  
Infrared Laser ◽  
Applied Water

Er:YAG laser ablation of dental enamel: influence of an optically thick water layer on the bond strength to composite resin

2003 ◽  
Author(s):  
Daniel Fried ◽  
Michal Staninec ◽  
John Xie ◽  
Colin W. Murphy ◽  
Charles Q. Le
Keyword(s):  
Laser Ablation ◽  
Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Dental Enamel ◽  
Water Layer

Dental Enamel Irradiated with a Low-Intensity Infrared Laser and Photoabsorbing Cream: A Study of Microhardness, Surface, and Pulp Temperature

2013 ◽  
Vol 31 (9) ◽  
pp. 439-446 ◽  
Author(s):  
Patricia da Silva Barbosa ◽  
Patricia Aparecida da Ana ◽  
Isis Andréa Venturini Pola Poiate ◽  
Denise Maria Zezell ◽  
Giselle Rodrigues de Sant' Anna
Keyword(s):  
Dental Enamel ◽  
Infrared Laser ◽  
Low Intensity ◽  
Pulp Temperature

scholarly journals Thermodynamic Investigations on the Laser Ablation Rate of Silicon over Five Fluence Decades

2013 ◽  
Vol 41 ◽  
pp. 640-649 ◽  
Author(s):  
V. Schütz ◽  
U. Stute ◽  
A. Horn
Keyword(s):  
Laser Ablation ◽  
Ablation Rate

Infrared Laser Ablation with Vacuum Capture for Fingermark Sampling

2017 ◽  
Vol 28 (9) ◽  
pp. 1958-1964 ◽  
Author(s):  
Fabrizio Donnarumma ◽  
Eden E. Camp ◽  
Fan Cao ◽  
Kermit K. Murray
Keyword(s):  
Laser Ablation ◽  
Infrared Laser

Optimizing controlled laser cutting of hard tissue (bone)

2018 ◽  
Vol 66 (12) ◽  
pp. 1072-1082 ◽  
Author(s):  
Lina M. Beltran Bernal ◽  
Iris T. Schmidt ◽  
Nikola Vulin ◽  
Jonas Widmer ◽  
Jess G. Snedeker ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Laser Cutting ◽  
Laser Surgery ◽  
Healing Process ◽  
Ablation Rate ◽  
Movement Speed ◽  
Lateral Movement ◽  
Hard Tissue ◽  
Robot Assisted ◽  
Bone Surgery

Abstract Conventional bone surgery leads to unwanted damage to the surrounding tissues and a slow healing process for the patients. Additionally, physicians are not able to perform free cutting shapes due to the limitations of available systems. These issues can be overcome by robot-assisted contactless laser surgery since it provides less mechanical stress, allows precise functional cuts, and leads to faster healing. The remaining drawback of laser surgery is the low ablation rate that is not yet competitive with conventional mechanical piezo-osteotomes. Therefore, we aim at maximizing the efficiency in hard tissue laser ablation by optimizing the lateral movement speed for different irrigation conditions. The results of this study show a non-linear relationship between cutting rates, speeds, and depths that should be critically considered for integration in robotic laser surgery.

scholarly journals Laser ablation of silicon with THz bursts of femtosecond pulses: an experimental and theoretical investigation

2021 ◽  
Author(s):  
Caterina Gaudiuso ◽  
Pavel N. Terekhin ◽  
Annalisa Volpe ◽  
Stefan Nolte ◽  
Bärbel Rethfeld ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Thermal Load ◽  
Laser Pulses ◽  
Ablation Rate ◽  
Pulse Mode ◽  
Femtosecond Laser Pulses ◽  
Photon Absorption ◽  
Burst Frequency ◽  
Two Photon Absorption ◽  
Theoretical Investigations

Abstract In this work, we performed an experimental investigation supported by a theoretical analysis, to improve knowledge on the laser ablation of silicon with THz bursts of femtosecond laser pulses. Laser ablated craters have been created using 200 fs pulses at a wavelength of 1030 nm on silicon samples systematically varying the burst features and comparing to the Normal Pulse Mode (NPM). Using bursts in general allowed reducing the thermal load to the material, however, at the expense of the ablation rate. The higher the number of pulses in the bursts and the lower the intra-burst frequency, the lower is the specific ablation rate. However, bursts at 2 THz led to a higher specific ablation rate compared to NPM, in a narrow window of parameters. Theoretical investigations based on the numerical solution of the density-dependent two temperature model revealed that lower lattice temperatures are reached with more pulses and lower intra-burst frequencies, thus supporting the experimental evidence of the lower thermal load in Burst Mode (BM). This is ascribed to the weaker transient drop of reflectivity, which suggests that with bursts less energy is transferred from the laser to the material. This also explains the trends of the specific ablation rates. Moreover, we found that two-photon absorption plays a fundamental role during BM processing in the THz frequency range.

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