Histological and Thermometric Examination of Soft Tissue De-Epithelialization Using Digitally Controlled Er:YAG Laser Handpiece: An Ex Vivo Study

2018 ◽  
Vol 36 (6) ◽  
pp. 313-319 ◽  
Author(s):  
Kinga Grzech-Leśniak ◽  
Jacek Matys ◽  
Kamil Jurczyszyn ◽  
Piotr Ziółkowski ◽  
Marzena Dominiak ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Er:Yag Laser ◽  
Ex Vivo ◽  
Digitally Controlled ◽  
Ex Vivo Study

Ex vivo study of Ho:YAG and thulium fiber lasers for soft tissue surgery: which laser for which case?

2020 ◽  
Author(s):  
Mark Taratkin ◽  
Anastasia Kovalenko ◽  
Ekaterina Laukhtina ◽  
Nina Paramonova ◽  
Leonid Spivak ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Fiber Lasers ◽  
Ex Vivo ◽  
Ex Vivo Study ◽  
Soft Tissue Surgery

Electrical resistance of human soft tissue sarcomas: an ex vivo study on surgical specimens

2015 ◽  
Vol 54 (5) ◽  
pp. 773-787 ◽  
Author(s):  
L. G. Campana ◽  
M. Cesari ◽  
F. Dughiero ◽  
M. Forzan ◽  
M. Rastrelli ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Electrical Resistance ◽  
Ex Vivo ◽  
Soft Tissue Sarcomas ◽  
Human Soft Tissue ◽  
Ex Vivo Study

scholarly journals The Efficacy of Erbium Laser in Infected Root Canals: ex vivo study

2017 ◽  
Vol 13 (30) ◽  
pp. 453
Author(s):  
Agime Dragidella ◽  
Mira Jankullovska ◽  
Xhevdet Aliu ◽  
David Stubljar
Keyword(s):  
Laser Radiation ◽  
Er:Yag Laser ◽  
Ex Vivo ◽  
Irrigation Treatment ◽  
Fusobacterium Nucleatum ◽  
Erbium Laser ◽  
Root Canals ◽  
Infected Root ◽  
Golden Standard ◽  
Ex Vivo Study

Background: Golden standard of cleaning infected root canals with irrigants does not completely remove pathogens. The aim of our study was to estimate efficacy of Er:YAG laser compared to standard irrigation with NaOCl in infected root canals. Methods: 140 extracted premolar singlerooted teeth were used. The crowns were cut off so that we obtained 15 mm of root canal. Samples were divided into four groups and inoculated with Enterococcus faecalis, Candida albicans, Streptococcus sanguinis, Fusobacterium nucleatum. As disinfecting methods we performed Er:YAG laser radiation and irrigation with 5.20% NaOCl. Viability of microorganisms was analyzed using fluorescence by flow cytometry. Results: Both methods effectively eliminated major percent of microorganisms. Statistical differences were observed between tested organisms (p<0.05) for Er:YAG laser (30 and 90 seconds) and 5.20% NaOCl irrigation. The number of dead microorganisms was significantly higher for C. albicans and S. sanguinis than for E. faecalis or F. nucleatum. Longer duration of laser radiation of 90 seconds showed significant efficiency compared to 30-seconds radiation (p<0.001) and achieved over 80% of dead microbial cells. Disinfecting activity was even better in combination with irrigants and achieved over 90% in addition of NaOCl. Conclusions: Irradiation with Er:YAG laser could be used as a simple and standard disinfection method in endodontics, or even better can be used as as adjuvant therapy to standard and irrigation treatment.

scholarly journals Comparative ex vivo Investigations on the Cutting Quality of the CO2 Laser and the Diode Pumped Er:YAG Laser

2021 ◽  
Vol 8 ◽  
Author(s):  
Holger Wurm ◽  
Patrick Johannes Schuler ◽  
Florian Hausladen ◽  
René Graesslin ◽  
Thomas Karl Hoffmann ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Repetition Rate ◽  
Thermal Damage ◽  
Er:Yag Laser ◽  
Ex Vivo ◽  
Laser System ◽  
Average Power ◽  
Cutting Depth ◽  
Laser Systems ◽  
Diode Pumped

Objectives: A sufficient histological evaluation is a key pillar in oncological treatment, especially in situations of cancer of unknown primary. CO2 laser technology is used in clinical routine of soft tissue surgery because of its cutting quality and availability. Diode pumped solid state Er(bium):YAG laser systems promise a higher cutting efficiency and minor thermal damages. The aim of this study was to compare both laser systems with respect to their suitability for cutting soft tissue.Methods: A setup was realized which enables comparable experiments with the clinical CO2 laser (AcuPulse 40ST DUO, Lumenis) and the Er:YAG laser system (DPM 40, Pantec Biosolutions AG). Fresh mucosal samples of porcine tongues were used to determine the influence of laser power and sample velocity on cutting depth and thermal damage width for both lasers. In addition, for the Er:YAG laser, the influence of the pulse repetition rate was examined additionally. For analysis, images of histological sections were taken.Results: In all experiments, the Er:YAG laser shows a significantly higher cutting depth (P &lt; 0.0001) and less thermal damage width (P &lt; 0.0001) than the CO2 laser. For example, at an average power of 7.7 W and a sample velocity of 5 mm/s the Er:YAG laser shows a mean cutting depth of 1.1 mm compared to the CO2 laser with 500 μm. While the Er:YAG laser shows a mean thermal damage width of 70 μm compared to 120 μm. Furthermore, the Er:YAG enables the adjustment of the cutting depth and thermal damage width by varying the irradiation parameters. A decrease of the repetition rate leads to a reduction of thermal damage. For example, a repetition rate of 100 Hz results in a thermal damage width of 46 μm compared to 87 μm at 800 Hz at an average power of 7.7 W and a cutting velocity = 5 mm/s while a homogenous cutting quality can be achieved.Conclusions: In conclusion, the results of these ex vivo experiments demonstrate significant advantages of the diode pumped Er:YAG laser system for soft tissue ablation compared to the CO2 laser, in particular regarding cutting efficiency and thermal damage width.

scholarly journals Assessment of Temperature Rise and Time of Alveolar Ridge Splitting by Means of Er:YAG Laser, Piezosurgery, and Surgical Saw: An Ex Vivo Study

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Jacek Matys ◽  
Rafał Flieger ◽  
Marzena Dominiak
Keyword(s):  
Temperature Rise ◽  
Laser Power ◽  
Thermal Damage ◽  
Er:Yag Laser ◽  
Ex Vivo ◽  
Common Adverse Effect ◽  
Study Groups ◽  
Alveolar Ridge ◽  
Bone Surface ◽  
Ex Vivo Study

The most common adverse effect after bone cutting is a thermal damage. The aim of our study was to evaluate the bone temperature rise during an alveolar ridge splitting, rating the time needed to perform this procedure and the time to raise the temperature of a bone by 10°C, as well as to evaluate the bone carbonization occurrence. The research included 60 mandibles (n=60) of adult pigs, divided into 4 groups (n=15). Two vertical and one horizontal cut have been done in an alveolar ridge using Er:YAG laser with set power of 200 mJ (G1), 400 mJ (G2), piezosurgery unit (G3), and a saw (G4). The temperature was measured by K-type thermocouple. The highest temperature gradient was noted for piezosurgery on the buccal and lingual side of mandible. The temperature rises on the bone surface along with the increase of laser power. The lower time needed to perform ridge splitting was measured for a saw, piezosurgery, and Er:YAG laser with power of 400 mJ and 200 mJ, respectively. The temperature rise measured on the bone over 10°C and bone carbonization occurrence was not reported in all study groups. Piezosurgery, Er:YAG laser (200 mJ and 400 mJ), and surgical saw are useful and safe tools in ridge splitting surgery.

Bactericidal effects of two parameters of Er:YAG laser intracanal irradiation: ex-vivo study

2011 ◽  
Vol 27 (6) ◽  
pp. 1165-1168 ◽  
Author(s):  
Miriam Porcel dos Santos Antonio ◽  
Cacio Moura-Netto ◽  
Samira Esteves Afonso Camargo ◽  
Harry Davidowicz ◽  
Marcia Martins Marques ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Ex Vivo ◽  
Bactericidal Effects ◽  
Two Parameters ◽  
Ex Vivo Study

scholarly journals Does Laser Surgery Interfere with Optical Nerve Identification in Maxillofacial Hard and Soft Tissue?—An Experimental Ex Vivo Study

Sensors ◽  
2015 ◽  
Vol 15 (10) ◽  
pp. 25416-25432 ◽  
Author(s):  
Bastian Bergauer ◽  
Christian Knipfer ◽  
Andreas Amann ◽  
Maximilian Rohde ◽  
Katja Tangermann-Gerk ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Laser Surgery ◽  
Ex Vivo ◽  
Ex Vivo Study ◽  
Nerve Identification

Comparison of Holmium:YAG and Thulium Fiber lasers on soft tissue : an ex vivo study.

2021 ◽  
Author(s):  
Steeve Doizi ◽  
Thibault Germain ◽  
Frédéric Panthier ◽  
Eva Comperat ◽  
Olivier TRAXER ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Fiber Lasers ◽  
Ex Vivo ◽  
Ex Vivo Study
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