Computable translucency as a function of thickness in a multi-layered zirconia

Erdelt, Kurt; Engler, Madalena Lucia Pinheiro Dias; Beuer, Florian; Güth, Jan‐Frederik; Liebermann, Anja; Schweiger, Josef

doi:10.1016/j.prosdent.2018.08.013

Cited by 31 publications

(23 citation statements)

References 13 publications

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“…In recent years, zirconia restorations have become more popular and attractive with regard to their superior esthetical, chemical, mechanical, and biological compatibility properties when compared to metal-ceramic restorative materials. [1][2][3][4] In conventional zirconia restorations, porcelain is veneered on Y-TZP ceramic core to fulfill the esthetic requirements in terms of optical properties such as color and translucency. The most important problem of these restorations is chipping and delamination of the veneering ceramic.…”

Section: Introductionmentioning

confidence: 99%

“…1,5 In order to avoid these problems, monolithic zirconia restoration systems that include a single material without any veneering dental porcelain have been developed for using with computer-aideddesign and computer-aided-manufacturing (CAD/CAM) systems. 1,6,7 Involvement of monolithic zirconia into dental applications gave rise to higher translucency and enhanced the optical and wear properties of all-ceramic restorations. [8][9][10] Thus, by using monolithic zirconia restorations, less tooth preparation is necessitated when compared to that of other monolithic and conventionally veneered ceramics and metalceramic conventional restorations.…”

Section: Introductionmentioning

confidence: 99%

“…Thanks to these modifications in new generation innovative ceramics, more translucent materials with a higher strength and long-term stability is obtained in dental zirconia restorations. 1,19 The translucency of a material is generally identified with the translucency parameter (TP). The TP determines the difference in color of a material over the black and white background at a constant thickness and corresponds to the visual evaluation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of sintering regimes and thickness on optical properties of zirconia ceramics for dental applications

Pekkan

2021

Int J Applied Ceramic Tech

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In dentistry, monolithic zirconia restorations have been preferred over all-ceramic restorations in recent years. Translucency is an aesthetic demand in dental restorations, and it can be identified with translucency parameter (TP). Zirconia thickness, Y 2 O 3 content, and sintering conditions are important parameters that influence the translucency of the restorations. It is crucial to investigate monolithic zirconia ceramics under different sintering regimes and reveal the critical parameters for dental restorations. The aim of this study was to determine the optical and microstructural behaviors of monolithic zirconia ceramics containing different amounts of yttria depending on various sintering regimes and thicknesses. Therefore, a conventional zirconia CopranZri (CZI) and two monolithic zirconia materials, CopraSupreme (CSP), CopraSmile (CSM) were used. Slow, normal, speed, and translucency sintering regimes with thicknesses of 0.7, 1.0, 1.3 mm were selected. TP of the specimens was calculated, and statistical analyses were performed by using one-way ANOVA and Tukey-Kramer post hoc tests. Characterization of the specimens was performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) techniques. The results showed that the effect of different sintering programs is more critical for CSP and CSM in terms of translucency variations and translucency program led to the most grain growth.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of sintering regimes and thickness on optical properties of zirconia ceramics for dental applications

Pekkan

2021

Int J Applied Ceramic Tech

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“…The monolithic zirconia restorations showed a high strength with a thin thickness, but have been not used in the anterior region but only in the posterior crown due to their optical properties 7. However, several coloring techniques89 and a variety of zirconia blocks such as a high-translucency monolithic zirconia block1011 and a multilayered zirconia block1213 have been introduced and the applications of monolithic zirconia have been expanded 14…”

Section: Introductionmentioning

confidence: 99%

Effect of different coloring liquids on the flexural strength of multilayered zirconia

Park

2019

J Adv Prosthodont

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PURPOSE The purpose of this study was to evaluate the effect of two coloring liquids (aqueous and acid-based coloring liquids) and the position of multilayered zirconia on the flexural strength of multilayered zirconia. MATERIALS AND METHODS The multilayered zirconia specimens were divided into upper and lower positions. The specimens were divided into three subgroups (n=10): non-shaded, acid-based coloring liquid, and aqueous coloring liquid. The specimens were cut using a milling machine and were immersed in either a acid-based coloring liquid or aqueous coloring liquid 2 times for 5 seconds. The specimens were sintered in a sintering furnace according to the manufacturer's introduction. The flexural strength of the specimen was measured using a universal testing machine and the surface of the specimen was observed using a field emission scanning electron microscope. RESULTS The flexural strength of multilayered zirconia was 400 – 500 MPa. There was no statistically significant difference among all groups ( P >.05).The flexural strength of the multilayered zirconia was not influenced by the kind of coloring liquid used ( P >.05). The flexural strength of the multilayered zirconia colored with the coloring liquids was not influenced by its position ( P >.05). CONCLUSION The different coloring liquid application did not affect the flexural strength of multilayered zirconia of all positions.

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“…In the last three years, what might be considered as the era of the latest generation of new multi-layered translucent zirconia materials have launched. 70,71 These materials (for example: IPS e.max ZirCAD Prime, Katana Multi-Layer) come with two to four layers of different translucencies within the same material. This is attained by a unique manufacturing technique that allows a combination of different zirconia materials (3Y-TZP and 5Y-TZP) in one innovative material.…”

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confidence: 99%

Monolithic and semi-monolithic translucent zirconium-dioxide restorations : aspects on design, material and strength

Bakitian¹

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Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknesses were 2.5, 2.0, 1.0, 0.8, 0.5 and 0.3 mm. Crowns were artificially aged before loaded to fracture. Determination of fracture mode was performed using light microscope. Results: Group 1.0 mm showed significantly (p .05) highest fracture loads (mean 1540 N) in comparison with groups 2.5, 2.0 and 0.3 mm (mean 851, 910 and 1202 N). There was no significant difference (p>.05) in fracture loads among groups 1.0, 0.8 and 0.5 mm (mean 1540, 1313 and 1286 N). There were significantly (p .05) more complete fractures in group 0.3 mm compared to all other groups which presented mainly cohesive fractures. Conclusions: Translucent zirconium dioxide crowns can be veneered with minimal thickness layer of 0.5 mm porcelain without showing significantly reduced fracture strength compared to traditionally veneered (1.0-2.0 mm) crowns. Fracture strength of micro-veneered crowns with a layer of porcelain (0.3 mm) is lower than that of traditionally veneered crowns but still within range of what may be considered clinically sufficient. Porcelain layers of 2.0 mm or thicker should be used where expected loads are low only.

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Computable translucency as a function of thickness in a multi-layered zirconia

Cited by 31 publications

References 13 publications

Effect of sintering regimes and thickness on optical properties of zirconia ceramics for dental applications

Effect of sintering regimes and thickness on optical properties of zirconia ceramics for dental applications

Effect of different coloring liquids on the flexural strength of multilayered zirconia

Monolithic and semi-monolithic translucent zirconium-dioxide restorations : aspects on design, material and strength

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