Factors affecting the translucency of monolithic zirconia ceramics: A review from materials science perspective

Pekkan, Gürel; Pekkan, Keriman; Bayındır, Banu Çukurluöz; Özcan, Mutlu; Karasu, Bekir

doi:10.4012/dmj.2019-098

Cited by 64 publications

(47 citation statements)

References 76 publications

(221 reference statements)

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“…The most important problem of these restorations is chipping and delamination of the veneering ceramic. 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.…”

Section: Introductionmentioning

confidence: 99%

“…[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. 5 Translucency is related with the light transmission or diffuse reflectance of a material. When a light beam passes | 1355 PEKKAN through a translucent material, it is scattered, reflected, and/ or transmitted according to crystalline structure, density, dispersion of crystals, pores, and inclusions.…”

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%

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 addition, digital‐image analysis techniques are employed as non‐contact color measurement methods . Along with color change, translucency properties of a material which can be measured by contrast ratio (CR), light transmittance, and translucency parameter (TP) methods also should be taken into consideration when determining color stability …”

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confidence: 99%

“…14 Along with color change, translucency properties of a material which can be measured by contrast ratio (CR), light transmittance, and translucency parameter (TP) methods also should be taken into consideration when determining color stability. 15 Several studies 11,12,[16][17][18] have evaluated the effects of the bleaching agents on ceramics and composite resins. However, to the best of our knowledge, the available data regarding the effect of in-office and at-home bleaching on the optical and surface characteristics of resin nano-ceramic and polymerinfiltrated ceramic network CAD/CAM materials are limited.…”

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confidence: 99%

Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Karakaya¹,

Cengiz

2019

Journal of Prosthodontics

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Purpose To evaluate the effect of in‐office and at‐home bleaching agents on color changes (ΔE00), translucency (TP00), whiteness (WID), surface roughness (Ra), and surface topography (Rsk and Rku) of a resin nano‐ceramic and a polymer‐infiltrated ceramic network CAD/CAM material. Materials and Methods Sixty specimens (6 mm × 7 mm × 1.3 mm) were prepared from Lava Ultimate (LU) and Vita Enamic (VE). The specimens were divided into 6 groups according to the bleaching agents applied (n = 10/group): control, Perfect Bleach Office + (PBO), Opalescence Boost (OB), Perfect Bleach (PB) with 10% and 16% carbamide peroxide and Whiteness Perfect (WP). ΔE00 values were calculated before and after bleaching procedures with a spectrophotometer using the CIEDE2000 formula. ΔTP00 and ΔWID values were calculated for each material. Ra, Rsk, and Rku values of the specimens were evaluated with an Atomic Force Microscope. Two‐way ANOVA was used for statistical analyses of the parameters measured after bleaching. For pairwise comparisons, Tukey test was performed. Results For LU, no statistically significant difference among the ΔE00 values of the groups was observed (p = 1.000). For VE, only WP group presented significantly higher values (2.12 ± 2.66) than the other groups (p < 0.001). For both materials; ΔTP00 values of at‐home bleaching groups were significantly higher than in‐office bleaching groups and control group (p < 0.001). For VE, ΔWID values did not demonstrate statistically significant difference (p = 1.000); however, for LU, PBO applied group showed statistically higher ΔWID values (3.00 ± 2.38) (p = 0.010) and WP applied group showed lower ΔWID values (0.47 ± 0.31) than the other groups (p = 0.030). For both LU and VE, there was no statistically significant difference among the groups regarding Ra (F = 4.544), Rsk (F = 2.369), and Rku values (F = 2.391) (p = 1.000). All of the VE groups presented Ra values higher than 0.2 µm. Conclusions The optical properties of LU and VE after bleaching applications were affected by the contact time with bleaching agents rather than concentration. Bleaching procedure had no effect on the surface properties of these materials.

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“…All of these factors along with the milling process may affect the strength, translucency, and dimensional accuracy of the final restoration. 3 Among a sample of US dental patients, most zirconia restorations were cemented with glass ionomer or resin-modified glass ionomer cements. 4 Bonding to zirconia with resin cement can produce a higher crown retention.…”

Section: Clinical Insightsmentioning

confidence: 99%

Zirconia restorations

Lawson¹,

Frazier²,

Bedran-Russo³

et al. 2021

The Journal of the American Dental Association

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Factors affecting the translucency of monolithic zirconia ceramics: A review from materials science perspective

Cited by 64 publications

References 76 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

Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Zirconia restorations

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