Comparison of lithium disilicate–reinforced glass ceramic surface treatment with hydrofluoric acid, Nd:YAG, and CO2 lasers on shear bond strength of metal brackets

Alavi, Shiva; Samie, Soroor; Raji, Seyed Amir Hossein

doi:10.1007/s00784-020-03576-y

Cited by 6 publications

(6 citation statements)

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“…Conditioning with Er,Cr:YSGG and CO 2 laser has the potential to be used in clinical settings alternative to HF+S when bonding to metallic brackets [ 66 ]. However, contrary to the previously mentioned statements, the study by Alavi et al concluded that neither CO 2 nor Nd:YAG lasers resulted in adequate surface changes for bonding ceramic brackets when compared to conditioned samples with HF [ 16 ]. This is also confirmed by Mirhashemi et al who demonstrated that although conditioning with Er:CrYSGG met SBS requirements for orthodontic brackets, the SBS must be improved through refinement of the irradiation details [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

“…According to the current available literature, the most commonly used protocol for ceramic surface treatment starts with an oxide aluminium sandblasting, followed by conditioning with hydrofluoric acid, application of silane, and lastly the placement of bonding resin [ 10 , 16 ]. Despite being a highly successful technique in terms of adhesion strength, this protocol also presents itself with a few handicaps.…”

Section: Introductionmentioning

confidence: 99%

“…Despite being a highly successful technique in terms of adhesion strength, this protocol also presents itself with a few handicaps. This sequence is not only long and complex, but the use of hydrofluoric acid requires a very careful application due to its high corrosiveness, meaning that in the sequence of a direct contact it can lead to soft tissue necrosis [ 2 , 9 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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What Is the Most Effective Technique for Bonding Brackets on Ceramic—A Systematic Review and Meta-Analysis

et al. 2022

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Background: There has been an increase in demand for orthodontic treatment within the adult population, who likely receive restorative treatments using ceramic structures. The current state of the art regarding the most effective method to achieve an appropriate bond strength of brackets on ceramic surfaces isn’t consensual. This systematic review aims to compare the available surface treatments to ceramics and determine the one that allows to obtain the best bond strength. Methods: This systematic review followed the PRISMA guidelines and the PICO methodology was used, with the question “What is the most effective technique for bonding brackets on ceramic crowns or veneers?”. The research was carried out in PubMed, Web of Science, Embase and Cochrane Library databases. In vitro and ex vivo studies were included. The methodological quality was evaluated using the guidelines for reporting of preclinical studies on dental materials by Faggion Jr. Results: A total of 655 articles searched in various databases were initially scrutinized. Sevety one articles were chosen for quality analysis. The risk of bias was considered medium to high in most studies. The use of hydrofluoric acid (HF), silane and laser afforded the overall best results. HF and HF plus laser achieved significantly highest bond strength scores in felsdphatic porcelain, while laser was the best treatment in lithium disilicate ceramics. Conclusions: The most effective technique for bonding brackets on ceramic is dependent on the type of ceramic.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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What Is the Most Effective Technique for Bonding Brackets on Ceramic—A Systematic Review and Meta-Analysis

et al. 2022

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“…It has been reported that whenever focused CO2 laser beams are used to heat ceramic surfaces, conchoidal tears (typically caused by surface heating) emerge on the surface. The fissures are believed to provide mechanical retention between resin cement and the ceramic surface (Alavi et al, 2021, Zarif Najafi et al, 2014. The fractional CO2 lasertreated samples at power 8 W have microcracks formation according to the SEM imaging, this may affect the strength of the material in spite of the high surface roughness value and corresponding bond strength.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

Noor Azad Mohammed*,

Zainab F. Al-Bawi,

Balsam saadi Abdulhameed

2023

IJL

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The use of indirect, all-ceramic restorations has grown in popularity among dentists. Studies have demonstrated that for indirect ceramic restorations to be effective over time, cement and ceramic must be bonded in a stable manner. Chemical, mechanical, and laser irradiation are among the methods used to precondition ceramic surfaces in order to increase bond strength.The objective of the study: This study was performed to investigate the roughness values and surface topography of lithium disilicate glass-ceramic treated with conventional methods and different Er,Cr:YSGG, and fractional CO2 laser conditioning parameters.Material and methods: Sixty samples of lithium disilicate glass-ceramic were divided as follows: 1- (n = 10) untreated; 2- (n = 10) Hydrofluoric acid etched; 3- (n = 10) conditioned by Er,Cr: YSGG laser at (7 W, 25 Hz, 50/50% Water/Air, pulse duration 60 us, irradiation time 2 min); 4- (n = 10) conditioned by Er,Cr:YSGG laser at (5 W, 25 Hz, 50/50% Water/Air, pulse duration 60 us, irradiation time 2 min); 5- (n = 10) conditioned by fractional CO2 laser at (power 8 W, pulse duration 10 ms); 6- (n = 10) conditioned by fractional CO2 laser at (power 6 W, pulse duration 10 ms). Then evaluated by: Profilometer, and scanning electron microscopy.Results: The highest roughness values were found in CO2 laser power 8 W treated samples, followed by Er,Cr:YSGG laser power 7W treated samples. The hydrofluoric acid-etched samples showed roughness values comparable to those of CO2 laser-irradiated samples with a power of 6 W. The untreated sample showed the smoothest surface with the lowest roughness value.Conclusion: The application of Er,Cr:YSGG, fractional CO2 lasers enhances the surface roughness of lithium disilicate samples positively, showing the promised results of using these parameters in bonding procedures.

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“…Samples were fitted in a cylinder with jaws; their position was adjusted, so they received the force parallel to the buccal surface of the teeth. The shear knife was positioned at the bracket/enamel interface and subjected to the testing machine (EMIC DL 2000, Equipment and Assay Systems, São José dos Pinhais, PR, Brazil), which was regulated at a speed of 0.5 mm/min until the brackets were removed [ 24 ]. Recorded values were converted into MPa, and debonding (kgF) was determined based on the bracket base area informed by the manufacturer (0.12428 cm 2 ).…”

Section: Methodsmentioning

confidence: 99%

Effect of Amelogenin Solution in the Microhardness of Remineralized Enamel and Shear Bond Strength of Orthodontic Brackets

Genovez-Júnior

Berger

Santos

et al. 2021

International Journal of Dentistry

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Objectives. To evaluate the microhardness of tooth enamel remineralized with enamel matrix protein solution as well as the shear bond strength of orthodontic brackets bonded to this surface. Materials and Methods. In total, 24 human premolars were selected and divided into 3 experimental groups (n = 8): SE—sound enamel, DE—demineralized enamel, and TE—demineralized enamel treated with amelogenin solution. Samples from DE and TE groups were subjected to pH cycling to induce initial artificial caries lesion. TE group was treated with amelogenin solution. Samples were placed in artificial saliva for 7 days. Knoop microhardness was measured before any intervention (T0), after pH cycling (T1) and after amelogenin solution treatment application (T2). Twenty-four hours after ceramic orthodontic brackets were bonded, samples were subjected to shear test in a universal testing machine. Microhardness and shear measurement distributions were subjected to Kolmogorov–Smirnov normality test, which was followed by parametric tests (α = 0.05): 2-way analysis of variance (factors: enamel condition × treatment) and Tukey posttest for all three groups (SE, DE, and TE) in T0 and T2 for microhardness; analysis of variance and Tukey’s test, for shear bond strength test. Results. Means recorded for Knoop microhardness in T2, for the SE (366.7 KHN) and TE (342.8 KHN) groups, were significantly higher than those recorded for the DE group (263.5 KHN). The shear bond strength of the SE (15.44 MPa) and TE (14.84 MPa) groups statistically differed from that of the DE group (11.95 MPa). Conclusion. In vitro demineralized enamel treatment with amelogenin solution was capable of taking samples’ hardness back to levels similar to those observed for sound enamel. The shear bond strength on the enamel subjected to this treatment was similar to that observed for healthy enamel and higher than that observed for demineralized enamel.

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Comparison of lithium disilicate–reinforced glass ceramic surface treatment with hydrofluoric acid, Nd:YAG, and CO2 lasers on shear bond strength of metal brackets

Cited by 6 publications

References 35 publications

What Is the Most Effective Technique for Bonding Brackets on Ceramic—A Systematic Review and Meta-Analysis

What Is the Most Effective Technique for Bonding Brackets on Ceramic—A Systematic Review and Meta-Analysis

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

Effect of Amelogenin Solution in the Microhardness of Remineralized Enamel and Shear Bond Strength of Orthodontic Brackets

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