Translucent zirconia ceramics for fabrication monolithic restorations: review. Part 2

Лебеденко, И. Ю.; Dyakonenko, E E; Sakhabieva, D.A.; Llaka, Ernest

doi:10.17116/stomat202099061101

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…The thickness of permanent restoration is influenced by the type of restoration, the material selection, and the preparation design ( Conrad et al, 2007 , Lebedenko et al, 2020 ). Conservative preparation can be performed when durable restorative materials are used.…”

Section: Introductionmentioning

confidence: 99%

Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study

Alsarani

2023

The Saudi Dental Journal

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Section: Introductionmentioning

confidence: 99%

Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study

Alsarani

2023

The Saudi Dental Journal

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“…2023, 13, 11461 2 of 11 opacity [4]. Tooth-colored and highly translucent zirconia has been developed and increasingly utilized in full-contour (monolithic) single crowns and multi-unit restorations [5,6]. Increased translucency in zirconia was achieved by reducing the alumina additive to 0.05% by weight while maintaining the yttrium oxide stabilizer at 3 mol% (equivalent to 4.5-5.6 wt%).…”

Section: Introductionmentioning

confidence: 99%

Marginal Discrepancy and Internal Fit of Bi-Layered and Monolithic Zirconia Fixed Dental Prostheses: An In Vitro Study

Alsarani,

Rizkalla,

Fava

et al. 2023

Applied Sciences

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This in vitro study evaluated the influence of restoration design (bi-layered vs. monolithic) and manufacturing technique on the marginal discrepancy and internal fit of 3-unit zirconia fixed dental prostheses (FDPs). Mandibular second premolars and second molars were prepared as abutments in a 3-unit zirconia bridge to develop four groups (n = 10 FDPs): MZ: Monolithic zirconia FDPs, ZL: zirconia framework veneered by the hand-layering technique, ZP: zirconia framework veneered by the heat-pressed technique, and CAD-on: zirconia framework veneered by CAD/CAM lithium-disilicate glass–ceramic. All the zirconia FDPs were cemented to their corresponding die replicas using dual-cure resin cement and were subjected to compressive cyclic loading at a load range for half a million cycles using a universal testing machine. FDPs were sectioned mesiodistally to measure the marginal gap and internal fit using scanning electron microscopy. The measurements were taken at pre-assigned points of each abutment. Data were statistically analyzed via a Kruskal–Wallis test (α = 0.05). No significant differences were found between the monolithic and bi-layered zirconia groups in terms of the marginal discrepancy. However, there was a significant difference in the marginal gap between the zirconia groups. The marginal gap between monolithic and bi-layered zirconia FDPs was within the clinically acceptable range (<100 μm). Comparable mean values of the marginal gaps of 3-unit monolithic and veneered zirconia FDPs were found. Therefore, the FDP design and veneering methods did not affect the marginal discrepancy. However, the mean internal gap varied among the experimental groups. As the current in vitro investigation demonstrated equivalent mean values of marginal gaps of both 3-unit monolithic and bi-layered zirconia FPDs, the use of monolithic 3-unit zirconia FPDs would be a viable alternative fabrication technique.

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Studying the Flexural Strength of Samples of Multilayer Dental Ceramics Based on Zirconium Dioxide of Domestic and Chinese Production After Traditional and High-Speed Sintering

Nenasheva,

Bykova,

Deev

et al. 2024

Actual Problems in Dentistry

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A study on the strength of samples of multilayer dental ceramics based on zirconium dioxide of domestic and Chinese production with three-point bending is provided. Dentures made of dental ceramics based on zirconium dioxide are sintered in clinical practice using the traditional multi-hour or high-speed method. The traditional sintering mode requires a long time, careful control of temperature, heating speed and guarantees high strength and aesthetics during prosthetics. The high-speed mode sinters dental multilayer ceramics based on zirconium dioxide quickly, efficiently and provides a high-quality connection of all layers in a shorter time, however, it can lead to a higher probability of defects in the structure of the ceramic crown, such as cracks or bubbles between layers in the ceramic material. Materials and methods. The samples were produced by computer milling and sintered in the traditional 10-hour and high-speed sintering mode in 22 minutes. The obtained results were subjected to statistical processing, including the calculation of the arithmetic mean and the error of the average. The samples of the neck layer showed the greatest strength in three-point bending, but the intermediate layer turned out to be the weakest. According to the results, for Chinese samples, the high-speed sintering mode does not significantly change the strength of ceramic samples in comparison with traditional hours-long firing. The high-speed sintering mode of domestic samples reduces the strength during three-point bending. Conclusions. The study showed that samples of Chinese multilayer ceramics limit the indications for its use in prosthetics. Russian samples of multilayer dental ceramics based on zirconium dioxide exceed the performance of their foreign counterparts in terms of strength at three-point bending. The presented research is important for the development of effective methods of orthopedic treatment, as well as for optimizing the production process of dental ceramics.

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Translucent zirconia ceramics for fabrication monolithic restorations: review. Part 2

Cited by 3 publications

References 25 publications

Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study

Influence of aging process and restoration thickness on the fracture resistance of provisional crowns: A comparative study

Marginal Discrepancy and Internal Fit of Bi-Layered and Monolithic Zirconia Fixed Dental Prostheses: An In Vitro Study

Studying the Flexural Strength of Samples of Multilayer Dental Ceramics Based on Zirconium Dioxide of Domestic and Chinese Production After Traditional and High-Speed Sintering

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