Effects of background color and thickness on the optical properties of CAD-CAM resin-matrix ceramics

Alfouzan, Afnan F.; Alnafaiy, Sarah M.; Alsaleh, Lama S.; Bawazir, Noor H.; Al-Otaibi, Hanan Nejer; Taweel, Sara Mohammad Al; Labban, Nawaf

doi:10.1016/j.prosdent.2022.06.009

Cited by 9 publications

(11 citation statements)

References 48 publications

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“…The effect of substrate or background color is also discussed in previous studies, albeit with a smaller number of substrate samples. 26,28 Masking ability of hybrid ceramics was evaluated on substrates made of amalgam, titanium, and composite filling material-simulating enamel and dentin-by Afouzan et al In contrast to the present study, it was found that although the substrate material affected the color appearance of the samples, these values were not statistically significant. 26 Porojan et al used three substrates made of composite to examine hybrid ceramics.…”

Section: Discussioncontrasting

confidence: 80%

“…27 Alfouzan et al examined the masking ability of hybrid ceramics, and a correlation was found between layer thickness and masking ability independent of ceramic type and background. 26 For all materials tested, it was found that an increase in ceramic thickness causes a decrease in translucency that is, an increase in the masking ability of the material. 30 3.…”

Section: Discussionmentioning

confidence: 94%

“…Previous studies do not provide such a numeric model of the effect of ceramic thickness on masking ability, but they clearly prove the phenomenon, and our results correlate with these findings. 26,27,30 Ruiz-L opez et al, during the examination of high translucent multi-color PICN materials, found that the lightness and chroma of the samples increases with thickening, but it does not show such a clear correlation with hue. 27 Alfouzan et al examined the masking ability of hybrid ceramics, and a correlation was found between layer thickness and masking ability independent of ceramic type and background.…”

Section: Discussionmentioning

confidence: 99%

“…In the case of all-ceramic systems, several studies have examined factors affecting the esthetics of the final restoration, such as the color of the abutment, the thickness and translucency of the ceramic, and the color and layer thickness of the luting cement. [18][19][20][21][22][23][24][25][26][27][28][29][30] During the examination of lithium-disilicate glass ceramics, it was found that the color of the abutment, the thickness of the ceramic and the color of the cement significantly influence the color of the restoration. 18,20 Regarding the final appearance of monolithic zirconia restorations, studies emphasize the effect of abutment color, ceramic thickness, and their combined effect.…”

Section: Introductionmentioning

confidence: 99%

“…24 Although PICN hybrid ceramics have been available on the market for 10 years, there is a lack of information regarding their masking ability. [26][27][28][29][30][31] Color perception is greatly influenced by the surface of the ceramic, its reflective properties, beyond the aforementioned parameters. Light reflection can be specular, diffuse, or a mixture of these in different proportions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of thickness, translucency, and substrates on the masking ability of a polymer‐infiltrated ceramic‐network material

Saláta

Szabó²,

Csuti³

et al. 2023

J Esthet Restor Dent

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ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer‐infiltrated ceramic‐network materials (PICN) with different translucencies and thicknesses on multiple types of substrates.Materials and MethodsCeramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2‐T, 2M2‐HT) in a thickness range of 0.5–2.5 mm (±0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try‐in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM‐3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (ΔE00) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal–Wallis test, and multiplicative effect analysis.ResultsAn increase in thickness of 0.5 mm reduces ΔE00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001).ConclusionsMasking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection.Clinical SignificanceAlthough PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in‐depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.

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Section: Discussioncontrasting

confidence: 80%