Surface etching and silane heating using Er:YAG and Nd:YAG lasers in dental ceramic luted to human dentin

Feitosa, Fernanda Alves; Tribst, João Paulo Mendes; Araújo, Ricardo; Pucci, César Rogério

doi:10.1111/ijac.13730

Cited by 6 publications

(19 citation statements)

References 28 publications

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“…CAD/CAM ceramics are available in crystalized or precrystalized blocks with different compositions 1 promoting optimal mechanical properties. [2][3][4][5][6][7] Biomaterials, such as reinforced glass ceramics, are one of the most reliable options to be applied as monolithic restorations with acceptable resistance and optical properties. 8,9 In addition, the high presence of silica and glassy matrix in the volume of these materials is associated with improved translucency and optimal esthetics for prosthetic treatment.…”

Section: Introductionmentioning

confidence: 99%

“…9 Additionally, it is well known that indirect restorations adhesively cemented to enamel presents reliable bond strength and long-term durability. 1 2 3 4 5 6 7 8 9…”

Section: Introductionmentioning

confidence: 99%

“…9 Additionally, it is well known that indirect restorations adhesively cemented to enamel presents reliable bond strength and long-term durability. [1][2][3][4][5][6][7][8][9] Despite the success of adhesive dentistry, it is not rare that after the tooth preparation, the substrate is not only in enamel, thus it is not always in the most suitable condition for the best bonding procedure. 10 In cases, for example, after endodontic treatments, it is common for the clinician to fill the access cavity with direct restorative materials (e.g., glass ionomer cement [GIC], resin composite [RC]).…”

Section: Introductionmentioning

confidence: 99%

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Substrate Rigidity Effect on CAD/CAM Restorations at Different Thicknesses

et al. 2022

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Objectives This article evaluated the effect of substrates rigidities on the post-fatigue fracture resistance of adhesively cemented simplified restorations in lithium disilicate glass ceramic. Methods Precrystalized computer-aided design/computer-aided manufacturing ceramic blocks were processed into disc-shaped specimens (n = 10, Ø = 10 mm), mimicking a simplified restoration at two thicknesses (0.5 and 1.0 mm). Thereafter, the discs were cemented onto different base substrates (dentin analogue [control], dentin analogue with a central core build-up of resin composite [RC], or glass ionomer cement [GIC]). The specimens were subjected to mechanical cycling in a chewing simulator (100 N, 1 × 106 cycles, 4 Hz) and then subjected to thermocycling aging (10,000 cycles, 5/37/55°C, 30 seconds). After the fatigue protocol, the specimens were loaded until failure (N) in a universal testing machine. Finite element analysis calculated the first principal stress at the center of the adhesive interface. Results The results showed that “restoration thickness,” “type of substrate,” and their interaction were statistically significant (one-way analysis of variance; p < 0.001). Regardless the restoration thickness a higher fracture load was observed for specimens cemented to dentin analogue. Among the base materials, RC build-up presented the highest fracture load and lower stress magnitude for both restoration thicknesses in comparison with GIC build-up. The 0.5-mm restoration showed higher stress peak and lower fracture load when submitted to the compressive test. Conclusion More flexible base material reduces the fracture load and increases the stress magnitude of adhesively cemented lithium disilicate restorations regardless the ceramic thickness. Therefore, more rigid substrates are suggested to be used to prevent restoration mechanical failures.

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Section: Introductionmentioning

confidence: 99%

“…9 Additionally, it is well known that indirect restorations adhesively cemented to enamel presents reliable bond strength and long-term durability. 1 2 3 4 5 6 7 8 9…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Substrate Rigidity Effect on CAD/CAM Restorations at Different Thicknesses

et al. 2022

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“…In contrast to the dry chemical‐based micro‐fabrication methods, laser etching SiC is capable of higher etching rate 15 and can act as an alternative approach 16 . The recast layers and cracks are inevitable due to the laser thermal effects 17 .…”

Section: Introductionmentioning

confidence: 99%

“…12,13 Micro-fabrication of MEMS device or via holes for highfrequency electronics devices require deep etching (up to 300 μm), and, consequently, high etch rate processes are desired. 14 In contrast to the dry chemical-based micro-fabrication methods, laser etching SiC is capable of higher etching rate 15 and can act as an alternative approach. 16 The recast layers and cracks are inevitable due to the laser thermal effects.…”

Section: Introductionmentioning

confidence: 99%

Non‐damage deep etching of SiC by hybrid laser‐high temperature chemical processing

Wang

Han

Ehrhardt

et al. 2022

Int J Applied Ceramic Tech

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SiC is considered as preferred material for micro‐electro‐mechanical system in the future. The excellent mechanical property and chemical stability make it difficult to perform deep etching. The hybrid laser‐high temperature chemical etching is investigated to realize non‐damage deep etching of SiC. The influences of defocus, laser pulse interval, laser intensity, and pulse number on etching depth are researched. The optimized laser parameter for SiC non‐damage deep etching is laser intensity of 10 × 109 W/cm2 with a pulse interval of 10 ms. In order to analyze the interaction mechanism, the temperature field and laser‐induced liquid jet in the liquid environment are calculated numerically. It is concluded that the material removal mechanism consists of laser heating vaporization during laser pulse, mechanical effect of laser‐induced liquid jet impact between two adjacent laser pulses and chemical etching in laser‐induced local high‐temperature environment. The chemical reaction between SiC and mixture of HF, and HNO3 solution produces gases and fluosilicic acid and effectively reduces the roughness of the modified layer making the surface smoother, and also removes the microcracks on the side wall of the etched region.

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Surface modification of zirconia or lithium disilicate-reinforced glass ceramic by laser texturing to increase the adhesion of prosthetic surfaces to resin cements: an integrative review

et al. 2023

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Objective The purpose of this study was to perform an integrative review on laser texturing the inner surface of lithium disilicate-reinforced glass ceramic or zirconia to increase their bond strength to resin-matrix cements. Materials and method A bibliographic review was performed on PubMed using the following search terms: “zirconia” OR “lithium disilicate” AND “laser” AND “surface” OR “roughness” AND “bond strength” AND “luting agent” OR “resin cement.” Studies published in English language until March 15, 2023, were selected regarding the purpose of this study. Results A total of fifty-six studies were identified althoug thirteen studies were selected. The findings revealed that zirconia surfaces were significantly modified after laser irradiation resulting in macro-scale aligned retentive regions with depth values ranging from 50 to 120 µm. Average roughness values of laser-textured zirconia by Er,Cr:YSGG laser (~ 0.83 µm) were quite similar when compared to grit-blasted zirconia surfaces (~ 0.9 µm) although roughness increased up to 2.4 µm depending on the laser type and parameters. Lithium disilicate-reinforced glass ceramics textured with Er:YAG revealed an average roughness of around 3.5 µm while surfaces textured using Nd:YAG laser revealed an average roughness of 2.69 µm; that was quite similar to the roughness values recorded for etched surfaces (2.64 µm). The shear bond strength (SBS) values of zirconia surfaces textured on Nd:YVO4 laser irradiation were slightly higher (~ 33.5 MPa) than those recorded for grit-blasted zirconia surfaces (28 MPa). Laser-textured zirconia surfaces on CO2 laser revealed higher SBS values (18.1 ±0.8 MPa) than those (9.1 ± 0.56 MPa) recorded for untreated zirconia surfaces. On lithium disilicate-reinforced glass ceramics, higher SBS values to resin-matrix cements were recorded for specimens textured with a combination of fractional CO2 laser irradiation and HF acid etching (~ 22–24 MPa) when compared with grit-blasted specimens (12.2 MPa). Another study revealed SBS values at around 27.5 MPa for Er:YAG-textured lithium disilicate-reinforced glass ceramics to resin-matrix cements. Conclusions The laser irradiation at high power increases the roughness of the inner surface of lithium disilicate-reinforced glass ceramic or zirconia leading to an enhanced bond strength to resin-matrix cements. Thus, the laser type and irradiation parameters can be adjusted to enhance the macro- and micro-scale retention of zirconia and glass ceramic surfaces to resin-matrix cements. Clinical relevance Alternative methods for surface modification of lithium disilicate-reinforced glass ceramic and zirconia surfaces have been assessed to provide proper morphological aspects for enhanced adhesion to resin-matrix cements. An increase in the bond strength of glass ceramics or zirconia to resin-matrix cements can improve the long-term performance of cemented prosthetic structures in the oral cavity.

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Surface etching and silane heating using Er:YAG and Nd:YAG lasers in dental ceramic luted to human dentin

Cited by 6 publications

References 28 publications

Substrate Rigidity Effect on CAD/CAM Restorations at Different Thicknesses

Substrate Rigidity Effect on CAD/CAM Restorations at Different Thicknesses

Non‐damage deep etching of SiC by hybrid laser‐high temperature chemical processing

Surface modification of zirconia or lithium disilicate-reinforced glass ceramic by laser texturing to increase the adhesion of prosthetic surfaces to resin cements: an integrative review

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