In vitro study on nanosecond-pulsed Q-switched Er:YAG laser-induced selective removal for caries dentin

2020 ◽  
Vol 4 (4) ◽  
pp. 195-202
Author(s):  
Sota Kondo ◽  
Hisanao Hazama ◽  
Kenji Tanaka ◽  
Aya Kasakawa ◽  
Shinichi Sekine ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
In Vitro Study ◽  
Selective Removal ◽  
Vitro Study

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.

Bactericidal Effect of the Er:YAG Laser on Dental Implant Surfaces: An In Vitro Study

2002 ◽  
Vol 73 (11) ◽  
pp. 1292-1298 ◽  
Author(s):  
Matthias Kreisler ◽  
Wolfgang Kohnen ◽  
Claudio Marinello ◽  
Hermann Götz ◽  
Heinz Duschner ◽  
...  
Keyword(s):  
Dental Implant ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Bactericidal Effect ◽  
Vitro Study

Effect of Er:YAG laser irradiation on deciduous enamel roughness and bacterial adhesion: An in vitro study

2019 ◽  
Author(s):  
Bernardo Teutle‐Coyotecatl ◽  
Rosalía Contreras‐Bulnes ◽  
Rogelio José Scougall‐Vilchis ◽  
Argelia Almaguer‐Flores ◽  
Laura Emma Rodríguez‐Vilchis ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Bacterial Adhesion ◽  
Er:Yag Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Enamel Roughness

Rapid debonding of polycrystalline ceramic orthodontic brackets with an Er:YAG laser: an in vitro study

2013 ◽  
Vol 29 (5) ◽  
pp. 1551-1556 ◽  
Author(s):  
Ambili Roselina Mundethu ◽  
Norbert Gutknecht ◽  
Rene Franzen
Keyword(s):  
Er:Yag Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Orthodontic Brackets ◽  
Polycrystalline Ceramic

Immunosorbent for Selective Removal of Lipoprotein (a) from Human Plasma: In Vitro Study

2008 ◽  
Vol 15 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Sergei N. Pokrovsky ◽  
Irina Yu. Adamova ◽  
Olga Y. Afanasieva
Keyword(s):  
Human Plasma ◽  
In Vitro Study ◽  
Selective Removal ◽  
Vitro Study ◽  
Lipoprotein A

Effect of Two Kinds of Er:YAG Laser Systems on Root Surface in Comparison to Ultrasonic Scaling: An in Vitro Study

2010 ◽  
Vol 28 (4) ◽  
pp. 497-504 ◽  
Author(s):  
Alicia Herrero ◽  
Ana Isabel García-Kass ◽  
Clara Gómez ◽  
Mariano Sanz ◽  
Juan Antonio García-Nuñez
Keyword(s):  
Er:Yag Laser ◽  
In Vitro Study ◽  
Root Surface ◽  
Vitro Study ◽  
Laser Systems
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