scholarly journals Evaluation the effect of the diode laser irradiation associated with photoabsorbing cream containing remineralizing agents on microhardness, morphology and the chemical structure of early enamel caries

2018 ◽  
pp. 0-0 ◽  
Author(s):  
F Ahrari ◽  
HS Mohammadipour ◽  
L Hajimomenian ◽  
A Fallah-Rastegar
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Chemical Structure ◽  
Enamel Caries

scholarly journals Bactericidal Effects of Diode Laser Irradiation on Enterococcus faecalis Using Periapical Lesion Defect Model

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Masato Nagayoshi ◽  
Tatsuji Nishihara ◽  
Keisuke Nakashima ◽  
Shigetsugu Iwaki ◽  
Ker-Kong Chen ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Periapical Lesion ◽  
Lesion Area ◽  
Defect Model ◽  
Cytotoxic Effects ◽  
Periapical Lesions ◽  
Bactericidal Effects

Objective. Photodynamic therapy has been expanded for use in endodontic treatment. The aim of this study was to investigate the antimicrobial effects of diode laser irradiation on endodontic pathogens in periapical lesions using an in vitro apical lesion model. Study Design. Enterococcus faecalis in 0.5% semisolid agar with a photosensitizer was injected into apical lesion area of in vitro apical lesion model. The direct effects of irradiation with a diode laser as well as heat produced by irradiation on the viability of microorganisms in the lesions were analyzed. Results. The viability of E. faecalis was significantly reduced by the combination of a photosensitizer and laser irradiation. The temperature caused by irradiation rose, however, there were no cytotoxic effects of heat on the viability of E. faecalis. Conclusion. Our results suggest that utilization of a diode laser in combination with a photosensitizer may be useful for clinical treatment of periapical lesions.

scholarly journals Viability of human septal cartilage after 1.45 µm diode laser irradiation

2008 ◽  
Vol 40 (8) ◽  
pp. 562-569 ◽  
Author(s):  
Ick-Soo Choi ◽  
Yong-Seok Chae ◽  
Allison Zemek ◽  
Dmitry E. Protsenko ◽  
Brian Wong
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Septal Cartilage

scholarly journals Effect of submucosal ICG injection to prevent the injury on muscle layer due to diode laser irradiation

1996 ◽  
Vol 17 (Supplement) ◽  
pp. 477-480
Author(s):  
Shoryoku Hino ◽  
Takuya Hayashi ◽  
Tunenori Arai ◽  
Makoto Kikuchi ◽  
Katunori Masuda ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Muscle Layer

scholarly journals The Efficacy of a Diode Laser on Titanium Implants for the Reduction of Microorganisms That Cause Periimplantitis

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7215
Author(s):  
Anna Wawrzyk ◽  
Michał Łobacz ◽  
Agnieszka Adamczuk ◽  
Weronika Sofińska-Chmiel ◽  
Mansur Rahnama
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Fungal Species ◽  
Laser Wavelength ◽  
Titanium Implants ◽  
Isolation And Identification ◽  
Implant Surface ◽  
Streptococcus Constellatus ◽  
Surface Optical ◽  
Irradiation Process

The paper presents the optimisation of a safe diode laser irradiation process applied to the surface of titanium implants in order to reduce microbial numbers in the treatment of inflammation classified as periimplantitis. The study comprised isolation and identification of microorganisms inhabiting surfaces of dental implants, crowns, teeth and saliva from patients with fully symptomatic periimplantitis. Microorganisms were detected by a culture-dependent method and identified with the use of MALDI-TOF mass spectrometry. The isolated microorganisms were inoculated on the surface of a new implant and then irradiated by a diode laser (wavelength of 810 ± 10 nm) in one, two or three repetitions and biocidal efficacy was assessed. To evaluate impact of laser irradiation on roughness, morphology and structure of the implant surface, optical profilometry, scanning electron microscopy and optical microscopy were used. Examination of the tested surfaces and saliva revealed the presence of Gram-positive and Gram-negative bacteria and one fungal species. In all patients, cultures from the endosseous part of the implant revealed the presence of the pathogenic and pyogenic bacterium Streptococcus constellatus. In 13 out of 20 samples laser-irradiated in duplicate and triplicate, all microorganisms were eliminated. The irradiation used did not cause any changes in the properties of the implant surface.

scholarly journals Effects of Diode and Nd:YAG Laser Irradiation on Friction Forces Between Two Types of Ceramic Brackets and Rhodium-Coated Archwires

2021 ◽  
Vol 12 (1) ◽  
pp. e13-e13
Author(s):  
Hannaneh Ghadirian ◽  
Allahyar Geramy ◽  
Mohammad Ali Keshvad ◽  
Soolmaz Heidari ◽  
Nasim Chiniforush
Keyword(s):  
Laser Irradiation ◽  
Diode Laser ◽  
Nd:Yag Laser ◽  
Yttrium Aluminum Garnet ◽  
Testing Machine ◽  
Control Group ◽  
Friction Forces ◽  
X Ray ◽  
Custom Made ◽  
Ceramic Brackets

Introduction: Ceramic brackets have gained increasing popularity among dental clinicians and orthodontic patients but friction is a major concern when using them. This study sought to assess the effects of diode and Nd:YAG (neodymium-doped yttrium aluminum garnet) laser irradiation on friction forces between two types of ceramic brackets and rhodium-coated esthetic archwires. Methods: Thirty polycrystalline and 30 poly-sapphire brackets were divided into 6 groups (n=10) as follows: (I) control polycrystalline brackets (no laser irradiation), (II) polycrystalline brackets subjected to diode laser irradiation, (III) polycrystalline brackets subjected to Nd:YAG laser irradiation, (IV) control poly-sapphire brackets (no laser irradiation), (V) poly-sapphire brackets subjected to diode laser irradiation, and (VI) poly-sapphire brackets subjected to Nd:YAG laser irradiation. The bracket slots were laser-irradiated on a custom-made table. Sixty 5-cm pieces of rhodium-coated archwires were used for the friction test in a universal testing machine at a speed of 10 mm/min. Ten brackets from the six groups underwent scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX). Results: The frictional resistance value of polycrystalline brackets was significantly higher than that of poly-sapphire brackets, irrespective of laser type (P<0.05). Irradiation of diode and Nd:YAG lasers, compared with the control group, had no significant effect on friction, irrespective of bracket type (P>0.05). Conclusion: It appears that diode and Nd:YAG laser irradiation cannot significantly decrease the friction. Future studies are warranted on different laser types with variable exposure.

The effect of 808 nm diode laser irradiation on shear bond strength of composite bonded to dentin before and after bonding

2015 ◽  
Vol 9 (2) ◽  
pp. 69 ◽  
Author(s):  
Farnoosh Alizadeh ◽  
Mohammadreza Malekipour ◽  
Farzaneh Shirani ◽  
Shahram Amini
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Diode Laser ◽  
Shear Bond Strength ◽  
Before And After

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.

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