Ceramic materials for porcelain veneers. Part I: Correlation between translucency parameters and contrast ratio

Barizon, Karine T.L.; Bergeron, Claude; Vargas, Marcos A.; Qian, Fang; Cobb, Deborah S.; Gratton, David G.; Geraldeli, Saulo

doi:10.1016/j.prosdent.2013.06.008

Cited by 81 publications

(82 citation statements)

References 25 publications

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“…CR and TP are often used to determine the translucency of dental ceramics and the two parameters are said to be strongly correlated 22,23) . In this study, the levels of translucency indicated by CR and by TP were indeed closely related.…”

Section: Resultsmentioning

confidence: 99%

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Nakamura¹,

Nakano²,

Usami³

et al. 2016

Dent. Mater. J.

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The purpose of this study was to examine the translucency and low-temperature degradation of silica-doped experimental Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) containing almost no alumina. The experimental Y-TZP samples were sintered at either 1,450 or 1,500°C. The samples of commercially available translucent Y-TZP and conventional Y-TZP were used as controls. The contrast ratio (CR) and translucency parameter (TP) were obtained to compare the translucencies. In addition, the specimens were also subjected to an accelerated aging test. The results showed that the experimental Y-TZP sintered at 1,500°C and translucent Y-TZP exhibited almost the same level of translucency. During the accelerated aging test, the translucent Y-TZP underwent a substantial increase in monoclinic content, an index of degradation after the aging test. However, neither the experimental Y-TZP nor the conventional Y-TZP exhibited any appreciable change. It was concluded that the silica-doped Y-TZP will develop translucency and resistance to degradation when sintered at 1,500°C.

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Section: Resultsmentioning

confidence: 99%

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Nakamura¹,

Nakano²,

Usami³

et al. 2016

Dent. Mater. J.

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“…16 Translucency parameter is based on differential colorimetric assessment of materials on white and black backgrounds and is generated according to the international CIE L*a*b* color scale. 12,17 The coordinate L* corresponds to lightness, while a* and b* define hue. The coordinate a* represents greenness (−a*) and redness (+a*), while b* corresponds to yellowness (+b*) and blueness (−b*).…”

Section: 5005/jp-journals-10024-2183mentioning

confidence: 99%

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Shamseddine¹,

Majzoub²

2017

The Journal of Contemporary Dental Practice

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Aim:The aim of this study was to compare the translucency parameter (TP) of ultratranslucent multilayered (UTML) zirconia according to thickness and layer level. Materials and methods:Rectangles of UTML zirconia with four layers [dentin layer (DEL), first transitional layer (FTL), second transitional layer (STL), and enamel layer (ENL)] and four different thicknesses (0.4, 0.6, 0.8, and 1 mm) were milled from blanks. Digital images were taken in a dark studio against white and black backgrounds under simulated daylight illumination and international commission on illumination (CIE) Lab* color values recorded using Photoshop Creative Cloud software. The TP was computed and compared according to thickness and layer level using analysis of variance (ANOVA) followed by Bonferroni post hoc analysis for multiple comparisons. Significance was set at p < 0.05. Results:In each thickness, TP values were similar between any two layers. The significant effect of thickness on the TP was observed only in the first two layers. In the DEL, translucency was significantly greater at 0.4 mm than all other thicknesses. In the FTL, differences were significant between 0.4 and 0.8 mm and between 0.4 and 1 mm. Conclusion:The investigated zirconia does not seem to show gradational changes in relative translucency from dentin to enamel levels regardless of the thickness used. Thickness affected the TP only in the first two layers with better translucency at 0.4 mm.Clinical significance: Since relative translucency does not seem to be significantly different between layers, clinicians can modify the apicocoronal positioning of the UTML layers within the restoration according to the desired Chroma without any implications on the clinically perceived translucency. While the thickness of 0.4 mm may be suggested for anterior esthetic veneers because of its higher translucency, the other thicknesses of 0.6 to 1 mm can be used to mask colored abutments in full contour restorations.

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“…Moreover, all current studies have analyzed the translucency of dental materials in a highgloss polished condition, but not with a roughened surface such as would occur after a period of wear, or in the case of insufficient polishing after milling or occlusal adjustment. [24][25][26][27][28] Accurate knowledge of the relationship between translucency and thickness and surface roughness is fundamental to improving the esthetic outcome of dental restorations. 22,29,30 The null hypotheses tested were that material thickness would not affect translucency; that the pretreatment method (roughening) would not affect translucency; and that the material type would not affect translucency.…”

Section: Introductionmentioning

confidence: 99%

Translucency of esthetic dental restorative CAD/CAM materials and composite resins with respect to thickness and surface roughness

Awad

Stawarczyk

Liebermann

et al. 2015

The Journal of Prosthetic Dentistry

256

226

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Ceramic materials for porcelain veneers. Part I: Correlation between translucency parameters and contrast ratio

Cited by 81 publications

References 25 publications

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Translucency and low-temperature degradation of silica-doped zirconia: A pilot study

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Translucency of esthetic dental restorative CAD/CAM materials and composite resins with respect to thickness and surface roughness

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