scholarly journals Acid resistance of dental enamel treated with remineralizing agents, Er:YAG laser and combined treatments

2018 ◽  
Vol 55 (3) ◽  
pp. 255-259 ◽  
Author(s):  
Alma Ceballos-Jiménez ◽  
Laura Rodríguez-Vilchis ◽  
Rosalía Contreras-Bulnes ◽  
Jesús Arenas Alatorre ◽  
Ulises Velazquez-Enriquez ◽  
...  
Keyword(s):  
Er:Yag Laser ◽  
Dental Enamel ◽  
Acid Resistance ◽  
Combined Treatments

Acid Resistance and Structural Changes of Human Dental Enamel Treated with Er:YAG Laser

2010 ◽  
Vol 28 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Laura Emma Rodríguez-Vilchis ◽  
Rosalía Contreras-Bulnes ◽  
Ignacio Sánchez-Flores ◽  
Enrique Cuauhtémoc Samano
Keyword(s):  
Structural Changes ◽  
Er:Yag Laser ◽  
Dental Enamel ◽  
Acid Resistance

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.

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.

Influence of the Pulse Duration of an Er:YAG Laser System on the Ablation Threshold of Dental Enamel

2002 ◽  
Vol 17 (4) ◽  
pp. 253-257 ◽  
Author(s):  
C. Apel ◽  
R. Franzen ◽  
J. Meister ◽  
H. Sarrafzadegan ◽  
S. Thelen ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Ablation Threshold ◽  
Er:Yag Laser ◽  
Laser System ◽  
Dental Enamel

Effect of Whole Saliva Components on Enamel Demineralization In Vitro

1993 ◽  
Vol 4 (3) ◽  
pp. 357-362 ◽  
Author(s):  
J.D.B. Featherstone ◽  
J.M. Behrman ◽  
J.E. Bell
Keyword(s):  
Dental Enamel ◽  
Acid Resistance ◽  
Human Teeth ◽  
Cross Sectional ◽  
Basic Proteins ◽  
Enamel Demineralization ◽  
Whole Saliva ◽  
Flow Through ◽  
Mineral Loss

The aim of the present study was to use an in vitro enamel demineralization model (1) to confirm that whole saliva pretreatment conferred acid resistance to dental enamel and (2) to determine whether this phenomenon was attributable to specific salivary proteins, minerals, lipids, or some combination of these. Crowns of human teeth, each with one exposed window, were prepared in groups of ten. They were each pretreated by immersion individually in 4 ml of either (1) clarified whole saliva for 18, 72, or 168 h, (2) dialyzed saliva (3500 MWCO membrane), (3) the "flow-through" fraction from a DEAE separation of whole saliva (neutral and basic proteins), (4) the "eluted" fraction of a DEAE separation of whole saliva (anionic proteins), or (5) a combination of salivary lipids and the DEAE "flow-through" fraction of whole saliva (neutral and basic proteins). Control groups were group 6 with no pretreatment, group 7 pretreated for 168 h in a borate buffer (5 mmol/1), and group 8 pretreated in a mineral solution containing calcium (0.7 mmol/1) and phosphate (2.6 mmol/1). The crowns were then demineralized for 7 d in vitro (0.1 mol/1 acetate, 1 mmol/l Ca and phosphate, pH 5.0) to produce artificial caries-like lesions. Lesions were assessed by cross-sectional microhardness profiles, and mineral loss (AZ, μm x vol% mineral) calculated. Mineral loss (AZ) values decreased linearly with the square root of time of pretreatment by whole saliva, confirming a time-dependent protective effect of salivary pellicle against demineralization of enamel. Pretreatments (168 h) by whole saliva (group 1), dialyzed saliva (group 2), and lipid/'flow through" proteins (group 5) gave equivalent protection (approximately 55%). However, no protection was provided by DEAE-separated protein fractions (no lipid present) or by the mineral alone. The protection of surface enamel against demineralization appears to be given by a combination of specifically adsorbed salivary lipids and proteins.

Fluoride uptake and acid resistance of enamel irradiated with Er:YAG laser

2007 ◽  
Vol 23 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Flávia M. Bevilácqua ◽  
Denise Maria Zezell ◽  
Romeu Magnani ◽  
Patricia A. da Ana ◽  
Carlos de Paula Eduardo
Keyword(s):  
Er:Yag Laser ◽  
Acid Resistance ◽  
Fluoride Uptake

scholarly journals Effect of Er:YAG laser irradiation on acid resistance to bovine dentin in vitro.

2000 ◽  
Vol 41 (2) ◽  
pp. 43-48 ◽  
Author(s):  
ATSUSHI KAMEYAMA ◽  
HIROSHI KOGA ◽  
MASAKAZU TAKIZAWA ◽  
YOSHINORI TAKAESU ◽  
YOSHITO HIRAI
Keyword(s):  
Laser Irradiation ◽  
Er:Yag Laser ◽  
Acid Resistance

scholarly journals The Effect of Er:YAG Laser Irradiation Combined With Fluoride Application on the Resistance of Primary and Permanent Dental Enamel to Erosion

2019 ◽  
Vol 10 (4) ◽  
pp. 290-296
Author(s):  
Fatemeh Molla Asadollah ◽  
Seyed Masoud Mojahedi ◽  
Hanie Nojedehian ◽  
Mohammad Asnaashari ◽  
Negin Asnaashari
Keyword(s):  
Laser Irradiation ◽  
Repeated Measures ◽  
Er:Yag Laser ◽  
Dental Enamel ◽  
Micro Hardness ◽  
Combined Use ◽  
Kolmogorov Smirnov ◽  
Ph Cycling ◽  
Mineral Loss ◽  
Smirnov Test

Introduction: Erosion is an important cause of tooth mineral loss. The combined use of lasers and fluoride has been introduced as a novel modality for the prevention of enamel demineralization. This study aimed to assess the effect of Er:YAG laser combined with fluoride application on primary and permanent enamel resistance to erosion. Methods: Eighty enamel specimens of permanent (n=40) and primary (n=40) molars were prepared and randomly assigned to 4 groups: C—control (no pretreatment), F—acidulated phosphate fluoride (APF) gel, FL—APF gel application followed by Er:YAG laser irradiation, and LF—Er:YAG laser irradiation followed by the application of APF gel . The specimens were then submitted to pH cycling using Coca-Cola (pH=2.4). Enamel micro-hardness was measured using the Vickers microhardness tester before pretreatment and after the erosive process. The collected data were analyzed using the Kolmogorov-Smirnov test, two-way ANOVA and repeated measures ANOVA. Results: The micro-hardness of both permanent and primary enamel specimens significantly decreased after the erosive process (P<0.05). In the permanent enamel specimens, the greatest reduction in micro-hardness was noted in groups C and F, while the least reduction was noted in group FL. However, these differences were not statistically significant (P>0.05). In the primary enamel specimens, the greatest reduction in micro-hardness was noted in groups C and LF, while the least reduction was noted in group F. These differences were not statistically significant (P>0.05). Conclusion: Within the limitations of this study, Er:YAG laser irradiation combined with fluoride application could not prevent erosion in permanent and primary enamel during the erosive process.

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