Biostimulation effect of DPSS laser irradiation with different power densities and radiation times on blood viscosity in vitro

2020 ◽  
Author(s):  
Marwa J. Yahia ◽  
Jamal A. Hasan ◽  
Mustafa S. AL Musawi
Keyword(s):  
Laser Irradiation ◽  
Blood Viscosity ◽  
Dpss Laser ◽  
Power Densities

Carbon dioxide laser irradiation of bacterial targets in vitro

1987 ◽  
Vol 9 (3) ◽  
pp. 265-273 ◽  
Author(s):  
P.O. Byrne ◽  
P.R. Sisson ◽  
P.D. Oliver ◽  
H.R. Ingham
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser

In vitro effects of low level yellow laser irradiation on human red blood cells

2016 ◽  
Author(s):  
Mustafa S. Al Musawi ◽  
M.S. Jaafar ◽  
B.T. Al-Gailani ◽  
Naser M. Ahmed ◽  
Fatanah M. Suhaimi
Keyword(s):  
Red Blood Cells ◽  
Laser Irradiation ◽  
Blood Cells ◽  
Low Level ◽  
Human Red Blood Cells ◽  
Yellow Laser ◽  
In Vitro Effects

scholarly journals Er:YAG laser-induced damage to a dental composite in simulated clinical scenarios for inadvertent irradiation: an in vitro study

2021 ◽  
Author(s):  
Katharina Kuhn ◽  
Carmen U. Schmid ◽  
Ralph G. Luthardt ◽  
Heike Rudolph ◽  
Rolf Diebolder
Keyword(s):  
Laser Irradiation ◽  
Laser Fluence ◽  
Ablation Threshold ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Crater Diameter ◽  
Clinical Scenarios ◽  
Laser Induced Damage

AbstractInadvertent Er:YAG laser irradiation occurs in dentistry and may harm restorative materials in teeth. The aim of this in vitro study was to quantify Er:YAG laser-induced damage to a nanohybrid composite in simulated clinical scenarios for inadvertent direct and indirect (reflection) laser irradiation. The simulation was performed by varying the output energy (OE;direct˃indirect) reaching the specimen and the operating distance (OD;direct˂indirect). Composite specimens were irradiated by an Er:YAG laser. The ablation threshold was determined and clinically relevant parameters were applied (n = 6 for each OE/OD combination) for direct (OE: 570 mJ/OD: 10 mm, OE: 190 mJ/OD: 10 mm) and indirect irradiation (OE: 466 mJ/OD: 15 mm, OE: 57 mJ/OD: 15 mm, OE: 155 mJ/OD: 15 mm, OE: 19 mJ/OD: 15 mm). The extent of damage in the form of craters was evaluated using a laser scanning microscope (LSM) and a conventional light microscope (LM). The ablation threshold was determined to be 2.6 J/cm2. The crater diameter showed the highest value (LM: 1075 ± 18 µm/LSM: 1082 ± 17 µm) for indirect irradiation (reflectant:dental mirror) (OE: 466 mJ/OD: 15 mm). The crater depth showed the highest and comparable value for direct (OE: 570 mJ/OD: 10 mm; LSM: 89 ± 2 µm) and indirect irradiation (OE: 466 mJ/OD: 15 mm; LSM: 90 ± 4 µm). For each OD, the crater diameter, depth, and volume increased with higher laser fluence. However, the OD—and thus the laser spot diameter—also had an enlarging effect. Thus, indirect irradiation (reflectant:dental mirror) with only 47% of the laser fluence of direct irradiation led to a larger diameter and a comparable depth. The three-dimensional extent of the crater was large enough to cause roughening, which may lead to plaque accumulation and encourage caries, gingivitis, and periodontitis under clinical conditions. Clinicians should be aware that reflected irradiation can still create such craters.

scholarly journals Profiling of Cytokines Secreted by Conventional Aqueous Outflow Pathway Endothelial Cells Activated In Vitro and Ex Vivo With Laser Irradiation

2015 ◽  
Vol 56 (12) ◽  
pp. 7100 ◽  
Author(s):  
Jorge A. Alvarado ◽  
Phuonglan Chau ◽  
Jianfeng Wu ◽  
Richard Juster ◽  
Amde Selassie Shifera ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Laser Irradiation ◽  
Ex Vivo ◽  
Outflow Pathway ◽  
Aqueous Outflow

Formation of pressure waves during in vitro excimer laser irradiation in whole blood and the effect of dilution with contrast media and saline

1994 ◽  
Vol 14 (1) ◽  
pp. 3-6 ◽  
Author(s):  
Andreas Baumbach ◽  
Karl K. Haase ◽  
Carsten Rose ◽  
Martin Oberhoff ◽  
Hartmut Hanke ◽  
...  
Keyword(s):  
Contrast Media ◽  
Laser Irradiation ◽  
Excimer Laser ◽  
Whole Blood ◽  
Pressure Waves ◽  
Excimer Laser Irradiation

scholarly journals Bactericidal Effects of Diode Laser Irradiation on Enterococcus faecalis Using Periapical Lesion Defect Model

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Masato Nagayoshi ◽  
Tatsuji Nishihara ◽  
Keisuke Nakashima ◽  
Shigetsugu Iwaki ◽  
Ker-Kong Chen ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Periapical Lesion ◽  
Lesion Area ◽  
Defect Model ◽  
Cytotoxic Effects ◽  
Periapical Lesions ◽  
Bactericidal Effects

Objective. Photodynamic therapy has been expanded for use in endodontic treatment. The aim of this study was to investigate the antimicrobial effects of diode laser irradiation on endodontic pathogens in periapical lesions using an in vitro apical lesion model. Study Design. Enterococcus faecalis in 0.5% semisolid agar with a photosensitizer was injected into apical lesion area of in vitro apical lesion model. The direct effects of irradiation with a diode laser as well as heat produced by irradiation on the viability of microorganisms in the lesions were analyzed. Results. The viability of E. faecalis was significantly reduced by the combination of a photosensitizer and laser irradiation. The temperature caused by irradiation rose, however, there were no cytotoxic effects of heat on the viability of E. faecalis. Conclusion. Our results suggest that utilization of a diode laser in combination with a photosensitizer may be useful for clinical treatment of periapical lesions.

In vitro analysis of low-level laser irradiation on human osteoblast-like cells proliferation

2011 ◽  
Author(s):  
Nora Bloise ◽  
Enrica Saino ◽  
Francesca Bragheri ◽  
Paolo Minzioni ◽  
Ilaria Cristiani ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Human Osteoblast ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Vitro Analysis ◽  
Low Level Laser Irradiation ◽  
In Vitro Analysis
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