Scanning electron microscope comparative surface evaluation of glazed-lithium disilicate ceramics under different irradiation settings of Nd:YAG and Er:YAG lasers

Viskić, Joško; Jokić, Dražen; Jakovljević, Suzana; Bergman, Lana; Ortolan, Slađana Milardović; Meštrović, Senka; Mehulić, Ketij

doi:10.2319/062017-408.1

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…Furthermore, the ceramic surface is capable of acid etching and chemical bonding through the application of silane coupling agent and resin cement [12]. Lithium disilicate and other high-crystalline content ceramics pose a significant challenge for orthodontic attachment bonding [13]. They consist of amorphous matrix containing 60-70% crystalline phase, which cause them to be more resistant to acid etching than feldspathic ceramics [14,15].…”

Section: Manufacturing Technologies Allow It To Have Both High Perfor...mentioning

confidence: 99%

“…Currently, with the availability of multiple types of aesthetic restorations and bonding techniques, orthodontists are facing challenges in determining the best methods in surface conditioning and bonding procedures to ceramics that makes a good attachments bond and that does not affect the ceramic's surface after debonding [13,19]. Moreover, choosing the best composite type to produce durable attachments is considered another challenge.…”

Section: Manufacturing Technologies Allow It To Have Both High Perfor...mentioning

confidence: 99%

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Bonding of Clear Aligner Composite Attachments to Ceramic Materials: An In Vitro Study

et al. 2022

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Background: We aim to evaluate the effect of surface conditioning, bonding agents and composite types on surface roughness (SR) and shear bond strength (SBS) of clear aligner composite attachments bonded to ceramics. Methods: One hundred and eighty IPS e.max CAD specimens were prepared. For SR, 60 specimens were divided according to surface conditioning (n = 15) into four groups: control, 9.6% hydrofluoric acid (HFA), 37% phosphoric acid (PhA), air abrasion (AA). SR was measured using a Profilometer and Atomic Force Microscopy. For SBS, 120 specimens were divided according to conditioning methods (n = 40) (9.6% HFA and 37% PhA or AA), then according to bonding agents (n = 20) (Assure universal bond (AUB) or Single bond universal (SBU)) and then according to composite type (n = 10): Filtek™ Z350 and Filtek™ Z350 XT flowable composite. SBS was measured using Instron testing machine. Descriptive and group comparison were calculated (p < 0.05). Results: AA had the highest SR, while the control had the lowest SR (p < 0.05). HFA had the highest, but insignificant SBS, followed by AA (p > 0.05). AUB had higher SBS than SBU (p < 0.001). Filtek™ Z350 produced higher SBS than Filtek™ Z350 XT flowable composite (p < 0.01). Conclusion: The combination of AA, AUB, and Filtek Z350 produced the highest SBS, followed by HFA, AUB, and Filtek Z350.

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Section: Manufacturing Technologies Allow It To Have Both High Perfor...mentioning

confidence: 99%

Section: Manufacturing Technologies Allow It To Have Both High Perfor...mentioning

confidence: 99%

Bonding of Clear Aligner Composite Attachments to Ceramic Materials: An In Vitro Study

et al. 2022

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“…The microstructure of the all tested groups scanned by SEM is illustrated in figures ( 3, A-E). The mean values of shear bond strength (MPa) and standard deviation (SD) of all tested groups are summarized in table (3) and are represented graphically in figure (5). There was significant difference in shear bond strength between different substrates with different surface treatments (p<0.001).…”

Section: Microstructural Analysismentioning

confidence: 99%

“…Bonding of orthodontic attachment to high crystalline content ceramics such as Lithium disilicate represents a great difficulty. (3) The composite applied to ceramic without roughening the ceramic surface created too weak bond strength to bear forces necessary for orthodontic tooth movements. (4 ) Several surface conditioning modalities either mechanically or chemically, have been advocated to increase the bond strength of orthodontic brackets to the ceramic surface to achieve durable bond strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Surface Treatment Modalities on Surface Roughness and Shear Bond Strength of Orthodontic Molar Tubes to Lithium Disilicate Ceramics

Bayoumi

Elkabbany

Gad

2019

Egyptian Dental Journal

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Objectives; This study aimed to evaluate the effect of different surface treatment modalities on surface roughness(SR) and shear bond strength (SBS) of orthodontic molar tubes to lithium disilicate (IPS e-max CAD/CAM, Ivoclar Vivadent) ceramic and human enamel using different adhesives. Materials and methods:A total of 150 e-max specimens were randomly divided into five groups (n=30) according to the method of surface treatment used. In group I (control group): no surface treatment, group II: sandblasting with 50 μm Al 2 O 3 slurry particles, group III: etching with hydrofluoric acid 9.6%, group IV: etching with hydrofluoric acid 4.5% and group V: etching with phosphoric acid 37%. Further random distribution of e-max specimens into subgroups was performed according to the type of adhesive used (One coat 7, G-Premio Bond and Ortho solo). The surface roughness was investigated using digital profilometer and atomic force microscopy (AFM). Microstructural analysis was conducted using scanning electron microscope (SEM).The SBS was measured using universal testing machine. Results were statistically analyzed.Results: Results showed that the sandblasting group had significantly highest surface roughness, while the lowest value was recorded in the Phosphoric acid 37% group. Furthermore, sandblasted group showed the highest SBS, while control group showed the lowest SBS. Strong positive correlation was found between the surface roughness of lithium disilicate and shear bond strength. Meanwhile, no significant differences were found between different adhesive agents use.Conclusions: Shear bond strength was highly affected by the surface roughness which subsequently controlled by the surface treatment modalities and not by the adhesives types. Hydrofluoric acid 4.5% and phosphoric acid 37% are recommended techniques for reliable bond strength between metal tubes and lithium disilicate ceramic.

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“…[23,24] The Er:YAG laser appears to have little or no effect on lithium disilicate material. [33,34] The laser settings used here appear to be too low to alter the structure of lithium disilicate or zirconia. [23,24,[35][36][37] The goal of our study was also to achieve minimal retrieval time at the lowest possible settings to avoid potentially harmful temperature increase and irreversible damage to the tooth substance.…”

Section: Discussionmentioning

confidence: 99%

Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An <em>in Vitro </em>Study

Grzech‐Leśniak¹,

Bencharit²,

Skrjanc³

et al. 2020

Preprint

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The study examined the effect of noninvasive crown retrieval/reuse process using erbium-doped yttrium aluminum garnet laser (Er:YAG). Twenty-six extracted human teeth were prepared for a crown. The crown was milled using lithium disilicate (LD) and zirconia (Z) materials, n=13 per group, 3 for scanning electron microscopy (SEM). The crown was luted using composite resin cement and subjected to a laser retrieval process. After the retrieval process, the crown was cleaned, recemented and laser-retrieved two more times, without and with additional tooth reduction mimicking clinical refreshment of dentin. Retrieval time and temperature were analyzed using analysis of variance (ANOVA). Surface changes were observed through SEM. The retrieval times were 267.1±130.43, 220±79.09, 277.1±126.44, 368.4±136.14, 355±159.39, and 419.2±121.36 seconds for first, second, third LD and Z groups, respectively (p=.009). The maximal temperatures were 23.95.1±1.89°C, 24.86±2.01°C, 24.17±1.53°C, 22.88±1.51°C, 24.03±1.74°C, and 21.99±1.32°C for for first, second, third LD and Z groups, respectively (p=.006). Er:YAG laser crown removal is an effective retrieval tool for all-ceramic crowns. Minimal changes to teeth and crowns were observed following laser irradiation.

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Scanning electron microscope comparative surface evaluation of glazed-lithium disilicate ceramics under different irradiation settings of Nd:YAG and Er:YAG lasers

Abstract: Neither Er:YAG nor Nd:YAG dental lasers exhibited adequate surface modification for bonding of orthodontic brackets on glazed lithium disilicate ceramics compared with the control treated with 9.5% HF.

Cited by 14 publications

References 20 publications

Bonding of Clear Aligner Composite Attachments to Ceramic Materials: An In Vitro Study

Bonding of Clear Aligner Composite Attachments to Ceramic Materials: An In Vitro Study

Effect of Different Surface Treatment Modalities on Surface Roughness and Shear Bond Strength of Orthodontic Molar Tubes to Lithium Disilicate Ceramics

Utilization of Er:YAG Laser in Retrieving and Reusing of Lithium Disilicate and Zirconia Monolithic Crowns in Natural Teeth: An <em>in Vitro </em>Study

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