A Comparison Between Phosphoric Acid- and Er:YAG Laser-Mediated Re-Etching of Enamel for Orthodontic Bracket Re-Bonding

2021 ◽  
Author(s):  
Xiaowan Zheng ◽  
Ying Zhao ◽  
Lu Tang ◽  
Lu Qin
Keyword(s):  
Phosphoric Acid ◽  
Er:Yag Laser ◽  
Orthodontic Bracket

scholarly journals Effectiveness of an Er:YAG Laser in Etching the Enamel Surface for Orthodontic Bracket Retention

2005 ◽  
Vol 24 (4) ◽  
pp. 596-602 ◽  
Author(s):  
Jung-Ho KIM ◽  
Oh-Won KWON ◽  
Hyung-Il KIM ◽  
Yong Hoon KWON
Keyword(s):  
Er:Yag Laser ◽  
Enamel Surface ◽  
Orthodontic Bracket

scholarly journals Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials

2014 ◽  
Vol 25 (6) ◽  
pp. 519-523 ◽  
Author(s):  
Erica Moreno Zanconato-Carvalho ◽  
João Felipe Bruniera ◽  
Natália Spadini de Faria ◽  
Vivian Colucci ◽  
Danielle Cristine Messias
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Composite Resins ◽  
Bleaching Procedure ◽  
Significant Difference ◽  
Restorative Materials

Surface treatment of dentin before the bleaching procedure may affect its permeability and influence the bond strength of restorative materials. This study evaluated the influence of surface treatment before the bleaching on shear bond strength (SBT) of restorative materials to intracoronal dentin. Dentin slabs were subjected to surface treatment: no bleaching (control - CON), no surface treatment + bleaching (HP), 37% phosphoric acid + bleaching (PA) and Er:YAG laser + bleaching (L). After the bleaching procedure, specimens (n=10) were restored with: microhybrid composite resin (MH), flowable composite resin (F), and resin-modified glass-ionomer cement (RMGIC). The shear test was carried out. ANOVA and Tukey's test (α=0.05) showed significant difference for surface treatment and restorative materials (p<0.05). CON presented higher STB and was statistically different from HP (p<0.05). PA and L showed intermediate values and were statistically similar to CON and HP (p>0.05). STB for MH and F were higher than RMGIC (p<0.05), and did not differ from each other (p>0.05). The surface treatments with phosphoric acid and Er:YAG laser before the bleaching procedure provided shear bond strength at the same level of unbleached dentin and the composite resins presented superior bond strength to the intracoronal dentin.

Laser-Aided Enamel Conditioning: A Comparison of Microleakage Under Brackets Following Different Aging Procedures

2019 ◽  
Vol 10 (2) ◽  
pp. 154-160
Author(s):  
Ufuk Ok ◽  
Berza Sen Yilmaz ◽  
Sabri Ilhan Ramoglu
Keyword(s):  
Phosphoric Acid ◽  
Thermal Cycling ◽  
Analytical Study ◽  
Er:Yag Laser ◽  
Thermomechanical Loading ◽  
Basic Fuchsin ◽  
Mean Values ◽  
Orthodontic Adhesives ◽  
Significant Difference ◽  
Self Etch

Objective: To evaluate microleakage under the orthodontic adhesives applied following two version of erbium:yttrium aluminum garnet (Er:YAG) laser-aided enamel conditioning after thermal and thermomechanical simulators. Materials and Methods: A comparative analytical study based on metal braces bonded on the enamel of extracted teeth ( n = 160) etched with acid, Er:YAG laser and Er:YAG laser with an X-Runner handpiece, and self-etch adhesives. An arch wire was ligatured to samples which were embedded in acrylic blocks by two with periodontal ligaments. The specimens were subdivided into two groups: those aged with thermal cycling and thermomechanical aging procedures. The samples were immersed in basic fuchsin solution (0.5%) for 24 h. Buccolingual sections were performed on the mesial and distal wings of the braces. The color penetration at the gingival and occlusal margins of the adhesive-bracket and enamel-adhesive was evaluated under a stereomicroscope. The median and mean values of microleakage in both groups were evaluated with Kruskal–Wallis and Mann–Whitney U tests ( P < .05). Results: The highest microleakage was recorded in the gingival part of the samples aged with the thermomechanical aging procedure ( P = .001). The amount of microleakage generally increased in the samples subjected to thermomechanical loading, but the only significant difference was recorded in the gingival part in each four different conditioning methods. Conclusion: Microleakage of the phosphoric acid-etched groups was recorded with lower values for both aging methods. Thermomechanical aging should be included to microleakage studies due to increased microleakage on gingival side for all etching groups.

scholarly journals Evaluation of Self-Etching Adhesive and Er:YAG Laser Conditioning on the Shear Bond Strength of Orthodontic Brackets

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Rosalía Contreras-Bulnes ◽  
Rogelio J. Scougall-Vilchis ◽  
Laura E. Rodríguez-Vilchis ◽  
Claudia Centeno-Pedraza ◽  
Oscar F. Olea-Mejía ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Color Change ◽  
Er:Yag Laser ◽  
Surface Preparation ◽  
Mean Value ◽  
Orthodontic Bracket ◽  
Laser Conditioning ◽  
Group I ◽  
Adhesive Remnant Index

The purpose of this study was to evaluate the shear bond strength, the adhesive remnant index scores, and etch surface of teeth prepared for orthodontic bracket bonding with self-etching primer and Er:YAG laser conditioning. One hundred and twenty bovine incisors were randomly divided into four groups. In Group I (Control), the teeth were conditioned with 35% phosphoric acid for 15 seconds. In Group II the teeth were conditioned with Transbond Plus SEP (5 sec); III and IV were irradiated with the Er:YAG 150 mJ (11.0 J/cm2), 150 mJ (19.1 J/cm2), respectively, at 7–12 Hz with water spray. After surface preparation, upper central incisor stainless steel brackets were bonded with Transbond Plus Color Change Adhesive. The teeth were stored in water at 37°C for 24 hours and shear bond strengths were measured, and adhesive remnant index (ARI) was determined. The conditioned surface was observed under a scanning electron microscope. One-way ANOVA and chi-square test were used. Group I showed the significantly highest values of bond strength with a mean value of 8.2 megapascals (MPa). The lesser amount of adhesive remnant was found in Group III. The results of this study suggest that Er:YAG laser irradiation could not be an option for enamel conditioning.

scholarly journals Shear bond strength of resin composite to enamel treated with Er:Y AG laser and phosphoric acid

2010 ◽  
Vol 10 (4) ◽  
Author(s):  
Nádia R. Svizero ◽  
Renato S. Carvalho ◽  
Lucirene A. Domingues ◽  
Carolina N. Pegorado ◽  
Carlos Henrique Francischone ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Er:Yag Laser ◽  
Resin Composite ◽  
Control Group ◽  
Third Molars ◽  
Dental Crowns ◽  
Acid Control ◽  
Composite Cylinders

The purpose of this work was to evaluate the shear bond strength of resin composite to enamel treated with Er:YAG laser. It was used 33 human third molars. After the dental crowns cutting, the mesial and distal surfaces were embedded perpendicularly to the PVC cylinders long axis. Enamel was ground and the samples were randomly divided into 6 groups: G1- phosphoric acid (control), G2- Er:YAG laser (60mJ/10Hz), G3- Er:YAG (100mJ/10Hz), G4- Er:YAG (60mJ/10Hz + acid), G5- Er:YAG (100mJ/ 10Hz + acid), G6- Er:YAG (80mJ/2Hz). In all groups, Single Bond was used and resin composite cylinders (Z100) were prepared. The samples were stored in distilled water at 37oC for 24 hours and submitted to shearing test. G1 presented bond strength values significantly higher than G2, G3 and G6. The groups irradiated only with Er:YAG laser, in different intensities and frequencies, were equivalent as for the bond strength values. The groups treated with laser + acid presented strength values statistically equal to those of the control group. The enamel treatment with phosphoric acid, or its association with laser, is important to obtain good bond. The use of Er: YAG laser alone is not recommended, considering the conditions tested in this study.

scholarly journals Siloranes–Suitability of a Novel Adhesive for Orthodontic Bracket Bonding

2021 ◽  
Vol 9 (11) ◽  
pp. 135
Author(s):  
Lorenz Brauchli ◽  
Markus Steineck
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
The Self ◽  
Control Group ◽  
The Novel ◽  
Shear Testing ◽  
Orthodontic Bracket ◽  
Adhesive Interface

Recently, an epoxy-based resin-Filtek Silorane-has been proposed for restorative fillings. It was the aim of the investigation to evaluate the suitability of this novel resin for orthodontic bracket bonding on unground enamel. Shear bond strength was measured for two adhesives-Filtek Silorane, Transbond XT-in combination with steel, ceramic and polymer brackets. For Filtek Silorane etching was performed with the Silorane self-etching primer, as well as phosphoric acid. The Transbond XT samples were etched with phosphoric acid only and served as the control group. All samples were thermo-cycled (1000×, 5–55 °C). Shear testing was carried out with an Instron 3344. In addition, ARI scores were evaluated. The Shear bond strength showed a weak adhesion of Filtek Silorane to unprepared enamel, either with the self-etching primer or the conventional etching (0.87–4.28 MPa). The Shear bond strength of the control group was significantly higher (7.6–16.5 MPa). The ARI scores showed a clear failure at the enamel-adhesive interface for all Filtek Silorane samples. For the combination of Transbond XT and different brackets the failure was found at the adhesive–bracket interface. The novel epoxy-based resin Filtek Silorane is not appropriate for bracket bonding to unprepared enamel.

scholarly journals Morphological Evaluation of the Bovine Dentin prepared with High-speed Turbine or Er:YAG Laser and submitted to Different Adhesive Systems after Laser Etching

2011 ◽  
Vol 2 (2) ◽  
pp. 117-123
Author(s):  
Carlos Rocha Gomes Torres ◽  
Maria Filomena Rocha Lima Huhtala ◽  
Simone Cristina Teixeira ◽  
Maria Amélia Máximo de Araujo
Keyword(s):  
Phosphoric Acid ◽  
High Speed ◽  
Er:Yag Laser ◽  
Acrylic Resin ◽  
Adhesive System ◽  
Study Groups ◽  
Adhesive Systems ◽  
Hybrid Layer ◽  
Diamond Bur ◽  
Group B

ABSTRACT This study evaluated the effect of the Er:YAG laser at different settings on the surface of bovine dentin as well as adhesive systems. A total of 21 bovine teeth had their apexes embedded in chemically activated acrylic resin to allow sectioning of a dentin slice parallel to the buccal aspect of each tooth. Thus, group A (12 slices), prepared with the high-speed turbine, being four for analysis of the dentin surface, four for analysis of the interface and four for analysis of resin tags. Group B (9 slices) prepared with the Er:YAG laser, being three for analysis of the surface, three for analysis of the interface and three for analysis of resin tags. Each slice received a different treatment: etching with phosphoric acid, Er:YAG laser (60 mJ/10 Hz), conventional adhesive Excite (Vivadent) and self-etching adhesive One-Up Bond F (Tokuyama). For analysis of the interface, all slices were fractured for exposure of the resin/dentin bond. All slices were processed to allow evaluation by scanning electron microscopy. The results revealed that the Er:YAG laser employed both for preparation and dentin etching removed the smear layer, opened the dentinal tubules and yielded surface cracks; there was formation of a large amount and deep tags in the study groups, except for the slice prepared with diamond bur at high-speed and self-etching adhesive systems; the interfaces revealed adequate adaptation of the adhesive system/composite resin to the dentin, with little evidence of hybrid layer; also, the slice prepared with diamond bur, etched with phosphoric acid and receiving the Excite adhesive system displayed a porous hybrid layer.

scholarly journals Acid Resistance of Erbium-doped Yttrium Aluminum Garnet Laser–Treated and Phosphoric Acid–Etched Enamels

2006 ◽  
Vol 76 (6) ◽  
pp. 1052-1056 ◽  
Author(s):  
Jung-Ho Kim ◽  
Oh-Won Kwon ◽  
Hyung-Il Kim ◽  
Yong Hoon Kwon
Keyword(s):  
Laser Ablation ◽  
Phosphoric Acid ◽  
Yttrium Aluminum Garnet ◽  
Er:Yag Laser ◽  
Reduction Rate ◽  
Acid Resistance ◽  
Mineral Dissolution ◽  
Acid Etching ◽  
Erbium Doped ◽  
Yttrium Aluminum

Abstract Objective: To compare the effects of erbium-doped yttrium aluminum garnet (Er:YAG) laser ablation and of phosphoric acid etching on the in vitro acid resistance of bovine enamel. Materials and Methods: Teeth were polished to make the surface flat. The polished enamel was either etched with 37% phosphoric acid for 30 seconds or ablated with a single 33 J/cm2 pulse from an Er:YAG laser. The control specimens were free from acid etching and laser ablation. Changes in crystal structure, dissolved mineral (calcium [Ca] and phosphorus [P]) contents, and calcium distribution in the enamel subsurface after a pH-cycling process were evaluated. Results: After laser treatment, poor crystal structures improved without forming any new phases, such as tricalcium phosphates. Among the tested enamels, dissolved mineral contents were significantly different (P &lt; .05). Er:YAG laser–treated enamels had the lowest mineral dissolution (Ca, 13.78 ppm; P, 6.33 ppm), whereas phosphoric acid–etched enamels had the highest (Ca, 15.90 ppm; P, 7.33 ppm). The reduction rate and reduced depth of calcium content along the subsurface were lowest in Er:YAG laser–treated enamels. Conclusion: The Er:YAG laser–treated enamels are more acid resistant to acid attack than phosphoric acid–etched enamels.

Microleakage of Sealants after Phosphoric Acid, Er: YAG Laser and Air Abrasion Enamel Conditioning: Systematic Review and Meta-Analysis

2017 ◽  
Vol 41 (3) ◽  
pp. 167-172 ◽  
Author(s):  
Ana Caroline Fumes ◽  
Daniele Lucca Longo ◽  
Andiara De Rossi ◽  
Tatiana Kelly da Silva Fidalgo ◽  
Francisco Wanderley Garcia de Paula e Silva ◽  
...  
Keyword(s):  
Systematic Review ◽  
Phosphoric Acid ◽  
Keyword Search ◽  
Er:Yag Laser ◽  
Ex Vivo ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Air Abrasion ◽  
Human Teeth ◽  
Mesh Terms

Purpose: The aim of this systematic review and meta-analysis is to answer the focused question: Does the application of phosphoric acid, Er:YAG laser and air abrasion enamel conditioning methods previous to the oclusal sealant application in human permanent molars influence the microleakage? Study design: A literature research was carried out in the Pubmed Medline, Web of Science, Scopus and Cochrane databases using with the MeSH terms and keyword search strategy. A supplemental hand search of the references of retrieved articles was also performed. Inclusion criteria comprised ex vivo studies (extracted teeth) with permanent human teeth that used chemical (phosphoric acid) or mechanical (Er:YAG laser and air abrasion) conditioning methods previous the sealant application. The studies should evaluate microleakage as an outcome. Meta-analysis pooled plot were obtained comparing the microleakage after pre-treatment with phosphoric acid, Er:YAG and air abrasion enamel conditioning for sealant application using RevMan software. Results: The search resulted in 164 articles, 55 records were excluded because they were duplicated. The analysis of titles and abstracts resulted in the exclusion of 105 studies. Four studies were included in the systematic review and the meta-analysis. According to the risk of bias evaluation, the four studies were considered low risk of bias. The meta-analysis showed that phosphoric acid had lower microleakage than Er:YAG laser (p &lt; 0.001) and air abrasion (p &lt; 0.001), with heterogeinity of I2 = 0% and I2 = 71%, respectively. It was not found statistical difference when compared phosphoric acid and phosphoric acid combined with Er:YAG laser and air abrasion (p &gt; 0.05). Conclusion: The evidence supports that the pretreatment with phosphoric acid leads lower microleakage in oclusal sealants than Er:YAG laser and air abrasion.

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