Structural Changes in Human Dental Enamel after Subablative Erbium Laser Irradiation and Its Potential Use for Caries Prevention

2004 ◽  
Vol 39 (1) ◽  
pp. 65-70 ◽  
Author(s):  
C. Apel ◽  
J. Meister ◽  
H. Götz ◽  
H. Duschner ◽  
N. Gutknecht
Keyword(s):  
Laser Irradiation ◽  
Structural Changes ◽  
Dental Enamel ◽  
Caries Prevention ◽  
Erbium Laser ◽  
Potential Use

scholarly journals Morphological and Structural Changes on Human Dental Enamel After Er:YAG Laser Irradiation: AFM, SEM, and EDS Evaluation

2011 ◽  
Vol 29 (7) ◽  
pp. 493-500 ◽  
Author(s):  
Laura Emma Rodríguez-Vilchis ◽  
Rosalía Contreras-Bulnes ◽  
Oscar Fernando Olea-Mejìa ◽  
Ignacio Sánchez-Flores ◽  
Claudia Centeno-Pedraza
Keyword(s):  
Laser Irradiation ◽  
Structural Changes ◽  
Er:Yag Laser ◽  
Dental Enamel

scholarly journals Chemical Changes Associated with Increased Acid Resistance of Er:YAG Laser Irradiated Enamel

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Jennifer Manuela Díaz-Monroy ◽  
Rosalía Contreras-Bulnes ◽  
Oscar Fernando Olea-Mejía ◽  
María Magdalena García-Fabila ◽  
Laura Emma Rodríguez-Vilchis ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Structural Changes ◽  
Er:Yag Laser ◽  
Laser Energy ◽  
Dental Enamel ◽  
Acid Resistance ◽  
Control Groups ◽  
Acid Dissolution ◽  
Chemical Changes ◽  
Group I

Background. An increase in the acid resistance of dental enamel, as well as morphological and structural changes produced by Er:YAG laser irradiation, has been reported.Purpose. To evaluate the chemical changes associated with acid resistance of enamel treated with Er:YAG laser.Methods. Forty-eight enamel samples were divided into 4 groups (n=12). Group I (control); Groups II, III, and IV were irradiated with Er:YAG at 100 mJ (12.7 J/cm2), 200 mJ (25.5 J/cm2), and 300 mJ (38.2 J/cm2), respectively.Results. There were significant differences in composition of irradiated groups (with the exception of chlorine) and in the amount of calcium released.Conclusions. Chemical changes associated with an increase in acid resistance of enamel treated with Er:YAG laser showed a clear postirradiation pattern characterized by a decrease in C at.% and an increase in O, P, and Ca at.% and no changes in Cl at.%. An increased Ca/P ratio after Er:YAG laser irradiation was associated with the use of higher laser energy densities. Chemical changes produced by acid dissolution showed a similar trend among experimental groups. Stable or increased Ca/P ratio after acid dissolution was observed in the irradiated groups, with reduction of Ca released into the acid solution.

Caries Prevention Effects of Silver Diamine Fluoride with 10,600 nm Carbon Dioxide Laser Irradiation on Dentin

2020 ◽  
Vol 38 (5) ◽  
pp. 295-300 ◽  
Author(s):  
Kenneth Luk ◽  
Irene Shuping Zhao ◽  
Ollie Yiru Yu ◽  
May Lei Mei ◽  
Norbert Gutknecht ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser ◽  
Caries Prevention ◽  
Silver Diamine Fluoride

Initial Dissolution Rate Studies on Dental Enamel after CO2 Laser Irradiation

1992 ◽  
Vol 71 (7) ◽  
pp. 1389-1398 ◽  
Author(s):  
J.L. Fox ◽  
D. Yu ◽  
M. Otsuka ◽  
W.I. Higuchi ◽  
J. Wong ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Laser Irradiation ◽  
Co2 Laser ◽  
Dental Enamel ◽  
Initial Dissolution Rate

Calcium solubility of dental enamel following Er, Cr:YSGG laser irradiation

2000 ◽  
Author(s):  
Christian Apel ◽  
Hans-Georg Graeber ◽  
Norbert Gutknecht
Keyword(s):  
Laser Irradiation ◽  
Dental Enamel ◽  
Calcium Solubility

scholarly journals Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation

2014 ◽  
Vol 15 (3) ◽  
pp. 283-287 ◽  
Author(s):  
Mateus Rodrigues Tonetto ◽  
Marcelo Ferrarezi de Andrade ◽  
Shelon Cristina Souza Pinto ◽  
Darlon Martins Lima ◽  
José Roberto Cury Saad ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Soft Tissues ◽  
Er:Yag Laser ◽  
Laser System ◽  
Dental Enamel ◽  
Target Tissue ◽  
Structural Effects ◽  
Ablation Process ◽  
Dental Tissues ◽  
Laser Systems

ABSTRACT Ideally projected to be applied on soft tissues, infrared lasers were improved by restorative dentistry to be used in hard dental tissues cavity preparations — namely enamel and dentin. This paper evidentiates the relevant aspects of infrared Erbium laser's action mechanism and its effects, and characterizes the different effects deriving from the laser's beams emission. The criteria for use and selection of optimal parameters for the correct application of laser systems and influence of supporting factors on the process, such as water amount and its presence in the ablation process, protection exerted by the plasma shielding and structural factors, which are indispensable in dental tissues cavity preparation related to restorative technique, are subordinated to optical modifications caused by the interaction of the energy dissipated by these laser light emission systems in the targeted tissue substrate. Clinical relevance Differences in the action of infrared Erbium laser system in regard to the nature of the ablation process and variations on the morphological aspects observed in the superficial structure of the target tissue irradiated, may be correlated to the structural optical modifications of the substrate produced by an interaction of the energy propagated by laser systems. How to cite this article Lima DM, Tonetto MR, de Mendonça AAM, Elossais AA, Saad JRC, de Andrade MF, Pinto SCS, Bandéca MC. Human Dental Enamel and Dentin Structural Effects after Er:yag Laser Irradiation. J Contemp Dent Pract 2014;15(3):283-287.

scholarly journals Study on Caries Prevention by Nd: YAG Laser Irradiation for Human Enamel

1990 ◽  
Vol 11 (Supplement) ◽  
pp. 477-480
Author(s):  
Masako Hashimoto ◽  
Junji Kato ◽  
Hiroshi Ono
Keyword(s):  
Laser Irradiation ◽  
Caries Prevention ◽  
Yag Laser ◽  
Human Enamel

scholarly journals Laser-Induced Modification of Hydrogenated Detonation Nanodiamonds in Ethanol

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2251
Author(s):  
Irena Bydzovska ◽  
Ekaterina Shagieva ◽  
Ivan Gordeev ◽  
Oleksandr Romanyuk ◽  
Zuzana Nemeckova ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Laser Irradiation ◽  
Structural Changes ◽  
Irradiation Time ◽  
Detonation Nanodiamonds ◽  
High Temperature Annealing ◽  
Inert Environment ◽  
Transmission Electron ◽  
Gradual Loss ◽  
532 Nm

Apart from the frequently used high-temperature annealing of detonation nanodiamonds (DNDs) in an inert environment, laser irradiation of DNDs in a liquid can be effectively used for onion-like carbon (OLC) formation. Here, we used fully de-aggregated hydrogenated DNDs (H-DNDs) dispersed in ethanol, which were irradiated for up to 60 min using a 532 nm NdYAG laser with an energy of 150 mJ in a pulse (5 J/cm2) at a pulse duration of 10 ns and a repetition rate of 10 Hz. We investigated the DND surface chemistry, zeta potential, and structure as a function of laser irradiation time. Infrared spectroscopy revealed a monotonical decrease in the C–Hx band intensities and an increase of the C–O and C=O features. Transmission electron microscopy (TEM) revealed the formation of OLC, as well as a gradual loss of nanoparticle character, with increasing irradiation time. Surprisingly, for samples irradiated up to 40 min, the typical and unchanged DND Raman spectrum was recovered after their annealing in air at 450 °C for 300 min. This finding indicates the inhomogeneous sp3 to sp2 carbon transformation during laser irradiation, as well as the insensitivity of DND Raman spectra to surface chemistry, size, and transient structural changes.

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