In-vitro evaluation of Er:YAG laser irradiation in apicoectomy and retrofilling cavity preparation compared to two other techniques

1998 ◽  
Author(s):  
Selma C. C. Camargo ◽  
Giulio Gavini ◽  
Carlos d. P. Eduardo ◽  
Carlos E. Aun ◽  
Jeffrey M. Coil
Keyword(s):  
Laser Irradiation ◽  
Er:Yag Laser ◽  
Cavity Preparation ◽  
In Vitro Evaluation

Surface temperature during cavity preparation on human tooth by Er:YAG laser irradiation

CIRP Annals ◽  
2011 ◽  
Vol 60 (1) ◽  
pp. 555-558 ◽  
Author(s):  
T. Furumoto ◽  
T. Ueda ◽  
A. Kasai ◽  
A. Hosokawa
Keyword(s):  
Surface Temperature ◽  
Laser Irradiation ◽  
Er:Yag Laser ◽  
Human Tooth ◽  
Cavity Preparation

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 Integrating CAD and 3D-Printing Techniques to Construct an In Vitro Laser Standard Treatment Platform for Evaluating the Effectiveness of Sterilization by Er:YAG Laser in Peri-Implant Intra-Bony Defects

2020 ◽  
Vol 10 (10) ◽  
pp. 3431
Author(s):  
Shih-Hao Chang ◽  
Hsiang-I Mei ◽  
Chun-Li Lin
Keyword(s):  
Escherichia Coli ◽  
3D Printing ◽  
Laser Irradiation ◽  
Dental Implants ◽  
Bacterial Adhesion ◽  
Er:Yag Laser ◽  
Bony Defect ◽  
Mandibular Incisor ◽  
Printing Techniques

This study established an in vitro model mimicking clinical peri-implant intra-bony defects. We investigated the effect of access limitation and the bactericidal effectiveness of erbium-doped yttrium, aluminum and garnet (Er:YAG) laser irradiation in shallow and deep peri-implant defects at different tooth positions. Reverse engineering, computer-aided design (CAD), and 3D-printing techniques were integrated to establish physical peri-implant intra-bony defect models at mandibular central incisor, first premolar, and first molar positions with shallow (2 mm depth) or deep (6 mm depth) defects and with 1.5 mm and 1.8 mm widths at the bottom and crestal portions of the alveolar process, respectively. Three-dimensional printed suites at the corresponding implant sites replaced experimental implant specimens for the investigation of bacterial adhesion in individuals. Dental implants with diameters of 3, 4 and 5 mm were utilized at the mandibular incisor, premolar, and molar positions, respectively. Bacterial adhesion of Gram (–) Escherichia coli on the exposed implant surfaces prior to sterilization was assessed. Sterilization with shallow and deep intra-bony defects was investigated by measuring the reduction of residual viable bacteria on implants after 60 s of irradiation with an Er:YAG laser. The adhesion rate of Gram (–) Escherichia coli on the investigated implant surfaces ranged from 1% to 3% (1.76 ± 1.25%, 2.19   ±   0.75% and 2.66   ±   1.26% for 3, 4, and 5 mm implants, respectively). With shallow peri-implant bony defects, the Er:YAG laser sterilization rates were 99.6 ± 0.5%, 99.3   ±   0.41% and 93.8 ± 7.65% at mandibular incisor, premolar, and molar positions, respectively. Similarly, sterilization rates in deep peri-implant defects were 99 ± 1.35%, 99.1 ± 0.98% and 97.14 ± 2.57%, respectively. A 3D-printed model with replaceable implant specimens mimicking human peri-implant intra-bony defects was established and tested in vitro. This investigation demonstrated effective sterilization using Er:YAG laser irradiation in both shallow and deep peri-implant intra-bony defects at different positions and diameters of dental implants.

Antibacterial Efficacy of Diode and Er:YAG Laser Irradiation in Experimentally Contaminated Primary Molar Root Canals

2009 ◽  
Vol 34 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Senem Selvi Kuvvetli ◽  
Nuket Sandalli ◽  
Nursen Topcuoglu ◽  
Guven Kulekci
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Er:Yag Laser ◽  
Positive Control ◽  
Control Group ◽  
Antibacterial Efficacy ◽  
Primary Molar ◽  
Root Canals ◽  
Number Of Bacteria

Objective: In vitro comparison of the antibacterial efficacy of Diode and Er:YAG laser irradiation with that of NaOCl irrigation in contaminated primary molar root canals. Study Design: 96 root canals prepared from 32 extracted primary molar teeth were mechanically enlarged and the teeth were randomly divided into 4 subgroups. The roots were inoculated with an overnight culture of Enterococcus faecalis in tryptic soy broth for 24 hours. The root canals irradiated with diode and Er:YAG laser and irrigated with NaOCl(5.25%) were experimental groups and untreated canals served as positive control group. Bacterial growth was analysed by counting viable E.faecalis on tryptic soy agar plates. Results: The number of bacteria was significantly reduced in experimental groups in comparison with the control group. Diode laser was determined to be more effective in reducing the number of bacteria when compared to Er:YAG laser. NaOCl irrigation was found significantly most effective. Conclusions: Diode laser irradiation and 5.25 % NaOCl application provided a significant antibacterial effect in vitro, in contaminated primary molar root canals.

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

In vitro evaluation of smear layer removal by Er:YAG laser application with five different fiberoptic tip withdrawl techniques

2003 ◽  
Author(s):  
Aldo Brugnera, Jr. ◽  
Danilo M. Zanello Guerisoli ◽  
Melissa A. Marchesan ◽  
Julio C. Emboava Spano ◽  
Jesus Djalma Pecora
Keyword(s):  
Er:Yag Laser ◽  
Smear Layer ◽  
Laser Application ◽  
In Vitro Evaluation ◽  
Layer Removal

In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiberoptic tip withdrawl techniques

2003 ◽  
Author(s):  
Jesus Djalma Pecora ◽  
Aldo Brugnera, Jr. ◽  
Melissa A. Marchesan ◽  
Danilo M. Zanello Guerisoli ◽  
Eduardo L. Barbin ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Laser Application ◽  
Root Temperature ◽  
In Vitro Evaluation ◽  
Temperature Changes

In-vitro evaluation of adhesion to human dentine of different canal sealers after Er:YAG laser application

2000 ◽  
Author(s):  
Manoel D. Sousa-Neto ◽  
Melissa A. Marchesan ◽  
Jesus D. Pecora ◽  
Aldo Brugnera, Jr. ◽  
Yara T. Silva-Sousa ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Laser Application ◽  
In Vitro Evaluation ◽  
Human Dentine

In Vitro Evaluation of Dentin Tubule Occlusion by Denshield and Neodymium-doped Yttrium-Aluminum-Garnet Laser Irradiation

2012 ◽  
Vol 38 (5) ◽  
pp. 662-666 ◽  
Author(s):  
Eleftherios-Terry R. Farmakis ◽  
Konstantinos Kozyrakis ◽  
Marouan G. Khabbaz ◽  
Ulrich Schoop ◽  
Franziska Beer ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Yttrium Aluminum Garnet ◽  
Yttrium Aluminum Garnet Laser ◽  
In Vitro Evaluation ◽  
Dentin Tubule ◽  
Yttrium Aluminum ◽  
Tubule Occlusion
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