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.

Thermodynamic effects after Diode and Er:YAG laser irradiation of grade IV and V titanium implants placed in bone – an ex vivo study. Preliminary report

2016 ◽  
Vol 61 (5) ◽  
Author(s):  
Jacek Matys ◽  
Ute Botzenhart ◽  
Tomasz Gedrange ◽  
Marzena Dominiak
Keyword(s):  
Chemical Composition ◽  
Laser Power ◽  
Ex Vivo ◽  
Titanium Implants ◽  
Implant Surface ◽  
Laser Parameters ◽  
Thermodynamic Effects ◽  
Titanium Grade ◽  
Time Required ◽  
Ex Vivo Study

AbstractMany inserted implants are affected by peri-implantitis. The aim of our study was to evaluate increases in implant temperature, depending on the diameter and chemical composition of implants. In particular we measured the time it takes for the temperature of an implant to rise by 10°C and evaluated laser power settings required to prevent thermal injury when an implant surface is decontaminated during the treatment of peri-implantitis. The study analysed six implants placed in porcine ribs and divided into two groups according to their diameter and chemical composition (grade IV and grade V titanium). The implants were irradiated with Diode and Er:YAG lasers using different laser parameters. The temperature was measured with a K-type thermocouple. The temperature on the implant surface rose as the laser power increased and the implant diameter decreased. The time required to increase the temperature of an implant by 10°C was less than it was for titanium grade IV. The temperature gradient was below 10°C for all implants treated using a laser power up to 1 W. It is important to choose the correct laser parameters, depending on the chemical composition and diameter of the implant, so that decontamination of the implant surface is thorough, effective and safe.

scholarly journals Evaluation of Static Friction of Polycrystalline Ceramic Brackets after Conditioning with Different Powers of Er:YAG Laser

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Valiollah Arash ◽  
Saeed Javanmard ◽  
Zeinab Eftekhari ◽  
Manouchehr Rahmati-Kamel ◽  
Mohammad Bahadoram
Keyword(s):  
Laser Power ◽  
Er:Yag Laser ◽  
Testing Machine ◽  
Frictional Resistance ◽  
Static Friction ◽  
Study Groups ◽  
Control Group ◽  
Sem Images ◽  
Polycrystalline Ceramic ◽  
Ceramic Brackets

This research aimed to reduce the friction between the wire and brackets by Er:YAG laser. To measure the friction between the wires and brackets in 0° and 10° of wire angulations, 40 polycrystalline ceramic brackets (Hubit, South Korea) were divided into 8 study groups and irradiated by 100, 200, and 300 mj/s of Er:YAG laser power. Two groups of brackets were not irradiated. The friction between the wires and brackets was measured with universal testing machine (SANTAM) with a segment of .019 × .025 SS wire pulled out of the slot of bracket. ANOVA andt-test were used for analyzing the results. To evaluate the effect of the laser on surface morphology of the bracket, SEM evaluations were carried out. The mean frictional resistances between the brackets and wires with 0° of angulation by increasing the laser power decreased compared with control group, but, in 10° of angulation, the friction increased regardless of the laser power and was comparable to the friction of nonirradiated brackets. Furthermore, with each laser power, frictional resistance of brackets in 10° of angulation was significantly higher than 0° of angulation. These results were explained by SEM images too.

scholarly journals Histological Ex Vivo Evaluation of Peri-Incisional Thermal Effect Created by a New-Generation CO2Superpulsed Laser

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
G. Palaia ◽  
A. Del Vecchio ◽  
A. Impellizzeri ◽  
G. Tenore ◽  
P. Visca ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Connective Tissue ◽  
Thermal Damage ◽  
Histological Analysis ◽  
Continuous Wave ◽  
Ex Vivo ◽  
Optical Microscope ◽  
Control Group ◽  
New Generation ◽  
Ex Vivo Study

The purpose of this study is the evaluation of the histological effects of a new-generation superpulsed CO2laser through an “ex vivo” study. A CO2(λ = 10,600 nm) ultra-speed laser (SmartUS20D, DEKA, Florence, Italy) has been used at different parameters from 2 to 4 watt in Continuous Wave (CW) and Pulsed Wave (PW, 50 Hz) to obtain 30 samples from pig cadaver tongues. All the specimens have been subdivided into 6 groups (from A to F) and each group consisted of 5 samples. A final specimen has been taken by scalpel and used as control group. Histological analysis has been performed using an optical microscope (Leica DM 2000) at a magnification of ×40. Results showed that histological readability was optimal in all the samples. The thermal damage has been negligible in all the groups. Furthermore, the average of thermal damage was 0,095 mm in the epithelial, while it was 0.245 mm in the connective tissue. Statistical analysis using Graphpad Prism 5 software showed no significant differences among the groups. CO2laser demonstrated a good surgical effectiveness provoking little peripheral damage onto the cut edges and allowing a safe histological diagnosis.

Influence of Er:YAG laser power on the ablation efficiency and thermal damage in hard dental tissue

1995 ◽  
Author(s):  
Dusan Sustercic ◽  
Matjaz Lukac ◽  
Karolj N. Nemes ◽  
Simona Cencic ◽  
Uros Skaleric ◽  
...  
Keyword(s):  
Laser Power ◽  
Thermal Damage ◽  
Er:Yag Laser ◽  
Dental Tissue ◽  
Ablation Efficiency ◽  
Hard Dental Tissue

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.

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

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 Effect of new innovative restorative carbomised glass cement on intrapulpal temperature rise: an ex-vivo study

2016 ◽  
Vol 30 (1) ◽  
Author(s):  
Murat Selim BOTSALI ◽  
Uğur TOKAY ◽  
Bilal OZMEN ◽  
Murat CORTCU ◽  
Alp Erdin KOYUTURK ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Ex Vivo ◽  
Ex Vivo Study

scholarly journals Evaluation of temperature rise following the application of diode and ErCr:Ysgg lasers: an ex vivo study

2019 ◽  
Vol 52 (3) ◽  
pp. 131-136 ◽  
Author(s):  
Alper Sindel ◽  
◽  
Omur Dereci ◽  
Mukerrem Hatipoglu ◽  
Oznur Ozalp ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Ex Vivo ◽  
Ex Vivo Study
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