scholarly journals Nd:YAG Lasers Treating of Carious Lesion and Root Canal In Vitro

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Danqing Xia ◽  
Zenggui Mo ◽  
Gang Zhao ◽  
Fei Guo ◽  
Chao You ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Bacterial Contamination ◽  
Dental Treatment ◽  
Disease Process ◽  
Bacterial Disease ◽  
Carious Lesion ◽  
Nd:Yag Lasers

Dental caries is a transmissible bacterial disease process, with cavities at the end, and caused by acids from bacterial metabolism. The essence of dental treatment is to clean and disinfect bacterial contamination from the tooth. In this work, we tried to demonstrate the cleaning and disinfecting effects of Nd:YAG laser irradiation on dental carious lesion and root canal in vitro. Acousto-optic Q-switched quasicontinuous and Cr3+:YAG crystal Q-switched pulse Nd:YAG lasers were employed to treat caries lesion and the root canal, respectively. Results showed that acousto-optic Q-switched quasicontinuous Nd:YAG laser irradiation and Cr3+:YAG crystal Q-switched pulse Nd:YAG laser irradiation could rapidly clean decayed material and bacterial contamination from dental carious lesion and the narrow tail end of root canal with minimally invasive in vitro, respectively. It was concluded that acousto-optic Q-switched quasicontinuous laser irradiation may be a rapid and effective alternative caries treatment, and Cr3+:YAG crystal Q-switched pulse Nd:YAG laser irradiation may be an effective method for canal cleaning and disinfecting during root canal therapy.

An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser

2013 ◽  
Vol 14 (2) ◽  
pp. 183-187 ◽  
Author(s):  
G Anil Kumar ◽  
Maneesha Das ◽  
Sindhu Ramesh ◽  
Surendranath Garapati
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Smear Layer ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Group Iii ◽  
Group I ◽  
Ah Plus

ABSTRACT Background Smear layer is a negative factor which prevents adhesion of the filling material to the dentinal walls. Recent advances in dental research have incorporated lasers as a potential adjunct in root canal treatment by removing the smear layer before filling the root canal system, enhancing the adhesion of sealers to dentin and improving the sealing ability. Aim To evaluate the microtensile bond strength of AH-Plus resin-based sealer to dentin after treatment with 980 nm diode and 1,064 nm neodymium-doped:yttrium aluminum garnet (Nd:YAG) laser in vitro. Materials and methods Thirty specimens prepared for three groups namely group I (control), group II (980 nm diode–lased specimens) and group III (Nd:YAG–lased specimens). One tooth from each group was observed under scanning electron microscope for evaluation of intracanal root dentin morphology. Remaining specimens were used for making microsections by hard tissue microtome. Specimens for groups II and III were lased with 980 nm diode and 1,064 nm Nd:YAG laser. AH Plus sealer was applied onto specimens and mounted onto Instron universal testing machine for microtensile bond strength testing. Results were subjected to statistical analysis using one-way analysis of variance (ANOVA) and Tukey's test. Results Group III Nd:YAG had maximum mean microtensile bond strength values (11.558 ± 0.869), followed by group II diode (9.073 ± 0.468) and group I control (6.05 ± 0.036). Statistically significant differences were seen among all the groups. SEM analysis shows removal of smear layer in both groups II and III. Conclusion Both Nd:YAG and diode laser were more effective than control group in improving the microtensile bond strength of AH Plus sealer to dentin. Clinical significance Lasers have the potential to increase the adhesiveness of root canal sealer to dentin surface, thereby improving the quality of root canal obturation. How to cite this article Maneesha D, Anil KG, Sindhu R, Surendranath G, Deepak S. An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser. J Contemp Dent Pract 2013;14(2): 183-187.

Removal of Two Types of Root Canal Filling Material Using Pulsed Nd:YAG Laser Irradiation

2004 ◽  
Vol 22 (6) ◽  
pp. 470-476 ◽  
Author(s):  
Tomoo Anjo ◽  
Arata Ebihara ◽  
Atsushi Takeda ◽  
Masaaki Takashina ◽  
Mitsuhiro Sunakawa ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Pulsed Nd:Yag Laser

Isolation and partial sequencing of cDNA clones from rat incisor after Nd:YAG laser irradiation in root canal

2006 ◽  
Vol 51 (7) ◽  
pp. 527-534 ◽  
Author(s):  
Yoshiko Murakami Masuda ◽  
Arine Unno ◽  
Mozammal Hossain ◽  
Tomohiro Okano ◽  
Koukichi Matsumoto
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Cdna Clones ◽  
Rat Incisor ◽  
Partial Sequencing

scholarly journals Effect of Nd:YAG laser in the bond strength of fiberglass posts

2015 ◽  
Vol 18 (4) ◽  
pp. 19
Author(s):  
Rayssa Ferreira Zanatta ◽  
Beatriz Maria da Fonseca ◽  
Stella Renata Steves ◽  
Carlos Rocha Gomes Torres ◽  
Sergio Eduardo Paiva Gonçalves
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Testing Machine ◽  
Adhesive System ◽  
Bonding Performance ◽  
Fiber Posts ◽  
Bond Strengths ◽  
Push Out

<p>The aim of the present study was to compare the effects of Nd:YAG laser application in root canals on bond strengths of fiber posts. Thirty single-rooted bovines were randomly divided into three groups (n=10); root canal instrumentation was performed, and pretreatment was conducted as follows: C group: conventional treatment (without laser irradiation); ALC group: Nd:YAG laser was applied after adhesive; and LAC group: Nd:YAG laser was applied before adhesive. The fiber posts Rebilda 15 DC (Voco) were cemented with an adhesive system and resin cement, in accordance with the manufacturer’s instructions. Six slices with 1.0mm height was obtained for of each root and bond strength was measured by push-out test using a universal testing machine (0.5 mm/min). Data were analyzed using Kruskal-Wallis and Dunn’s tests (p &lt;0.05). Push-out bond strengths to root canal dentin were affected by the type of treatment and root third. The use of Nd:YAG laser after the application of adhesive system had a higher bonding performance compared with the use of laser before the application. Also, cervical and medium third presented higher bond strength values than the apical third. It must be conclude that the laser irradiation over the non-cured adhesive system is more efficient for increase in bond strength than the irradiation after the application of the adhesive. However, the use of 60mJ of laser energy is not sufficient to improve the bonding performance.</p>

Myocardial temperature distribution under cw Nd:YAG laser irradiation in in vitro and in vivo situations: theory and experiment

1995 ◽  
Vol 34 (3) ◽  
pp. 391 ◽  
Author(s):  
Robert Splinter ◽  
Serguei Y. Semenov ◽  
Glenn A. Nanney ◽  
Laszlo Littmann ◽  
Jan R. Tuntelder ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Myocardial Temperature ◽  
Theory And Experiment
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