Effect of repeated firings and staining on the mechanical behavior and composition of lithium disilicate

Miranda, Jean Soares; Barcellos, Aline Serrado de Pinho; Campos, Tiago Moreira Bastos; César, Paulo Francisco; Amaral, Marina; Kimpara, Estevão Tomomitsu

doi:10.1016/j.dental.2020.02.003

Cited by 21 publications

(29 citation statements)

References 29 publications

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“…In the present study, the LD ceramic significantly increased its BFS at 7F compared to 2F. However, these findings do not agree with Miranda et al, 39 in which BFS was not affected by multiple firings for any of the groups. Tang et al 40 reported that multiple firings could be effective for improving the densification and the hardness of veneering ceramics for zirconia restorations, however no major effects were found in flexural strength, fracture toughness, or microstructure.…”

Section: Discussioncontrasting

confidence: 99%

Effect of Consecutive Firings on the Optical and Mechanical Properties of Silicate and Lithium Disilicate Based Glass‐Ceramics

Morais

Abu-Izze

Rossi

et al. 2021

Journal of Prosthodontics

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Purpose To evaluate the effect of multiple firings on the optical and mechanical properties of two dental CAD/CAM glass‐ceramics. Materials and Methods A total of 45 specimens of each lithium disilicate‐LD (IPS E.max CAD, Ivoclar Vivadent) and zirconia lithium silicate‐ZLS (Vita Suprinity, Vita Zahnfabrik) material were prepared in a disk shape. These specimens were divided into three groups according to two factors: “type of ceramic” (LD and ZLS) and “numbers of firings” (Control 2F‐two firings, 5F‐five firings and 7F‐seven firings). The firing cycles were performed according to the manufacturer's recommendations. X‐ray diffraction was additionally performed to determine crystalline phases in each group, spectrophotometry was used to determine color and translucency variation, and biaxial flexural strength (BFS) evaluated the mechanical behavior. The data were analyzed individually using two‐way ANOVA tests and Tukey's test at α = 0.05. Results The crystalline phases did not present any change after multiple firings for either of the analyzed materials. Both commercial materials showed a significant difference regarding translucency at 7F (p = <0.01), and ZLS presented a difference in color higher than one (ΔE > 1) at 5F and 7F. Regardless of the number of firings, LD presented a higher BFS compared to ZLS (p = <0.001), and a significant increase in BFS comparing 2F and 7F (p = <0.024). Conclusion The use of multiple firings can significantly alter the color, translucency, and mechanical strength of CAD/CAM ceramics.

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Section: Discussioncontrasting

confidence: 99%

Effect of Consecutive Firings on the Optical and Mechanical Properties of Silicate and Lithium Disilicate Based Glass‐Ceramics

Morais

Abu-Izze

Rossi

et al. 2021

Journal of Prosthodontics

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“…The ceramic discs were subjected to one of the following procedures : no additional procedure (NO; n = 80), crystallization firing with a maximum temperature of 850 °C for 28 min (Programat EP 3000, Ivoclar Vivadent), as recommended by the manufacturer; and stain and glaze (SG; n = 80), crystallization firing as mentioned above, followed by staining (IPS e.max Ceram Shades, Ivoclar Vivadent, Schaan, Liechtenstein) and glazing (IPS e.max Ceram Glaze Liquid, Ivoclar Vivadent, Schaan, Liechtenstein). Firing of the stain and glaze was performed in a single cycle, with a maximum temperature of 770 °C for 17 min ( Miranda et al, 2020a ).…”

Section: Methodsmentioning

confidence: 99%

“…Stains and glaze are fired after ceramic injection or crystallization, increasing the time of LD firing, and may result in alteration of mechanical properties ( Miranda et al, 2020a ), and may lead to an irregular and/or porous surface, which is prone to biofilm formation ( Vo et al, 2015 ). The processing steps of LD may lead to stress concentration on the surface of LD ( Subaşı et al, 2014 ), resulting in different surface characteristics ( Aurélio et al, 2015 , Abdalla et al, 2021 , Fraga et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of staining on the mechanical, surface and biological properties of lithium disilicate

Barcellos

Miranda

Amaral

et al. 2022

The Saudi Dental Journal

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“…Raman spectroscopy was used to determine the rate of polymerization of bioglass ceramic [ 105 ], identification and testing of the presence of various compounds in implant materials [ 106 ], ceramics [ 107 , 108 , 109 ], bioglass [ 110 ]; analysis of the phase composition of bioglass [ 111 ], ceramics [ 112 , 113 ]; and evaluation of the degree of conversion of resins [ 114 ] and ceramics [ 115 ].…”

Section: Raman Spectroscopymentioning

confidence: 99%

Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

et al. 2021

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The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and Mass Spectrometry (MS), which are widely employed in the investigation of the surface properties of dental materials. Examples of the research of materials used as tooth fillings, surface preparation in dental prosthetics, cavity preparation methods and fractographic studies of dental implants are also presented. The cited studies show that the above techniques can be valuable tools as they are expanding the research capabilities of materials used in dentistry.

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Effect of repeated firings and staining on the mechanical behavior and composition of lithium disilicate

Cited by 21 publications

References 29 publications

Effect of Consecutive Firings on the Optical and Mechanical Properties of Silicate and Lithium Disilicate Based Glass‐Ceramics

Effect of Consecutive Firings on the Optical and Mechanical Properties of Silicate and Lithium Disilicate Based Glass‐Ceramics

Effect of staining on the mechanical, surface and biological properties of lithium disilicate

Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review

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