Translucent zirconia in the ceramic scenario for monolithic restorations: A flexural strength and translucency comparison test

Carrabba, Michele; Keeling, Andrew; Aziz, Aziz; Vichi, Alessandro; Fonzar, Riccardo Fabian; Wood, David; Ferrari, Marco

doi:10.1016/j.jdent.2017.03.002

Cited by 126 publications

(101 citation statements)

References 36 publications

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“…Furthermore, the substrate color affects the final esthetic outcome [29]. This is consistent with the findings of the previous studies, which have demonstrated that material type, thickness, and background color affect the shade of the final prosthesis [3,20,24,30]. Background color had a significant effect on the color of all the three selected materials at each thickness.…”

Section: Discussionsupporting

confidence: 88%

“…The high ΔE of Suprinity could be related to the incorporation of zirconia into its composition. Furthermore, the two types of crystals in its composition and inhomogeneity of the crystalline structure contribute to the high color difference values, which could result in low masking ability [3,20,30]. On the contrary, the high masking ability of lithium disilicate (IPS e.max) could be attributed to enhanced crystal structure and high translucency of a single type of crystal in its composition.…”

Section: Discussionmentioning

confidence: 99%

“…The increased thickness will result in diminished diffused reflection effects of the underlying or background color, and most of the diffused reflection occurs in the overlying material. Thus, clinicians should consider increasing the ceramic's thickness to mask the underlying color [20,22,30].…”

Section: Discussionmentioning

confidence: 99%

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Influence of thickness and background on the color changes of CAD/CAM dental ceramic restorative materials

Alfouzan

Al-Otaibi

Labban

et al. 2020

Mater. Res. Express

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This study aimed to compare the effect of thickness and background on the color changes of CAD/ CAM materials (zirconia-reinforced lithium silicate (Suprinity), lithium disilicate (IPS E-max CAD), and hybrid ceramic (Enamic)). Twelve specimens for each thickness (0.4 mm, 0.5 mm, 1 mm, 1.5 mm, and 2 mm) were obtained by sectioning three CAD/CAM materials. A spectrophotometer was used to measure the color change of the specimens against different backgrounds (A2 enamel, A4 dentin, gray, and metal) using the CIELab color space system. Analysis of variance, sample t-test, and posthoc multiple comparison tests were used to evaluate and compare the color changes for different material types, thicknesses, and background colors, with a significance level of P0.05. The result demonstrated that material type, the thickness of the material, and the color of the background had a significant effect on ΔE (P=0.000). Regardless of the material thickness, Suprinity had the highest mean ΔE values (5.4±1.9), and E-max had the lowest mean ΔE values (1.1±0.6). At 2 mm thickness, Enamic presented the lowest ΔE values (0.5±0.5) against the A2 background. The 0.5 and 1 mm specimens corresponded to the highest ΔE values, whereas the 1.5 and 2 mm thickness specimens predominantly gave the lowest ΔE values. All the independent factors, including the type and thickness of the material, and color of the background, contributed significantly to ΔE of the tested materials (P0.05). The study confirms the high masking ability of the lithium disilicate (Emax) material. In clinical situations where the color of the core needs to be masked, it is recommended to use lithium disilicate (E-max).

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

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Influence of thickness and background on the color changes of CAD/CAM dental ceramic restorative materials

Alfouzan

Al-Otaibi

Labban

et al. 2020

Mater. Res. Express

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“…The ceramic translucency is not high enough to imitate tooth structures, and consequently using this ceramic neighboring a natural tooth may compromise esthetics. Besides, the flexural strength of this ceramic is less than that of a framework zirconia (∼1200 MPa) or a high translucency monolithic zirconia (∼980 MPa), and therefore, this may increase the risk of fracture . Hence, the manufacturer contraindicates Katana Zirconia UTML for a fixed partial denture (3‐unit or longer), and also recommends a minimum thickness of 0.8 mm to compensate for the strength, but this may compromise the translucency …”

Section: Manufacturing Processesmentioning

confidence: 99%

Color Aspect of Monolithic Zirconia Restorations: A Review of the Literature

Tabatabaian

2018

Journal of Prosthodontics

136

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Monolithic zirconia restoration is an acceptable treatment option in restorative dentistry and a developing trend in esthetic dentistry. Digital dentistry has simplified fabrication of monolithic zirconia restorations. Zirconia ceramic has introduced an opportunity to achieve both esthetic and mechanical requirements for restorations. This is rarely found for a ceramic in dentistry. Monolithic zirconia restorations represent an acceptable durability, comparable to metal-ceramic restorations, while they are superior to metal-ceramic restorations esthetically; however, difficulties to gain an optimal shade reproduction and a color match with monolithic zirconia restorations still remain. The color of these restorations may be influenced by manufacturing processes, laboratory procedures, and clinical factors. Manufacturing processes determine basic optical properties of zirconia ceramics. Different laboratory procedures may create optical changes in zirconia ceramics. Also clinical factors such as dental background, cement, and zirconia restoration features may affect the resulting color. This literature review aimed to discuss potent factors in the color of monolithic zirconia restorations. An electronic search of the PubMed/Google Scholar database was performed to find related English-language articles published between January 1, 2000, and October 31, 2017. The key terms of background, cement, ceramic, color, esthetics, shade, spectrophotometry, thickness, translucency, and zirconia were used both individually and simultaneously. Also, a manual search was conducted, and five classic articles of color science were added. Thus 192 articles were included. In the last decade, shade reproduction of monolithic zirconia restorations has been highly regarded; however, further improvements are required in the manufacturing process to produce tooth-like zirconia ceramics. An esthetic guideline named background-cement-ceramic color harmony was suggested in this study; however, more clinical practice guidelines should be established for monolithic zirconia restorations on esthetics, and therefore, more studies are required.

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“…Hence, monolithic ZrO 2 ceramics with 5 to 8% of yttria have emerged as having less opacity 60) . However, such a strategy sacrifices the flexural strength 66) and fracture toughness because of the partial loss of the transformation toughening effect of tetragonal ZrO 2 20,60) .…”

Section: Yttria Content (3% or 5-8%)mentioning

confidence: 99%

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

Pekkan

Bayındır

et al. 2020

Dent. Mater. J.

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The use of monolithic [yttria (Y2O3)-stabilized tetragonal zirconia (ZrO2) polycrystalline] (Y-TZP) ceramics to restore teeth is expanding in dentistry. However, there are still some problems about color matching and the translucency of these ceramics. The employment of Y-TZP ceramics in aesthetically critical regions is questionable due to the insufficient translucency and opacity of the restorations. The objective of this review was to assess the factors affecting the translucency of monolithic Y-TZP ceramics for a better understanding the relevant parameters in restorations. The translucency of polycrystalline ceramics is a complex phenomenon. Apprehending the translucency regarding ceramics requires their knowledge of physical, chemical and microstructural characteristics with the light interactions among them.

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Translucent zirconia in the ceramic scenario for monolithic restorations: A flexural strength and translucency comparison test

Cited by 126 publications

References 36 publications

Influence of thickness and background on the color changes of CAD/CAM dental ceramic restorative materials

Influence of thickness and background on the color changes of CAD/CAM dental ceramic restorative materials

Color Aspect of Monolithic Zirconia Restorations: A Review of the Literature

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

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