Contrast Ratio of Six Zirconia‐Based Dental Ceramics

Kanchanavasita, Widchaya; Triwatana, Premwara; Suputtamongkol, Kallaya; Thanapitak, and Alisa; Chatchaiganan, Mathura

doi:10.1111/jopr.12143

Cited by 32 publications

(31 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result suggests that Zr1500 has almost the same level of translucency as commercially available translucent Y-TZP. As the thickness of the specimens increased, CR also increased but TP decreased, resulting in a lower level of translucency; this is the same tendency as has been reported in the past 24,25) . In addition, another report 26) states that TZI was found to have a lower CR value but a higher level of translucency than ZI, corroborating the results of our study.…”

Section: Resultssupporting

confidence: 83%

“…In addition, another report 26) states that TZI was found to have a lower CR value but a higher level of translucency than ZI, corroborating the results of our study. Elsewhere 25) , it was reported that TZI, in the thickness range of 0.6 to 1.5 mm, was found to have lower CR values and higher levels of translucency than other commercial translucent Y-TZP products (ZENO Translucent, LAVA Plus High Translucency).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Nakamura¹,

Nakano²,

Usami³

et al. 2016

Dent. Mater. J.

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 83%

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.

View full text Add to dashboard Cite

show abstract

“…Where Y b and Y w are the spectral reflectance of light of the specimen over a black and white background, respectively . For a transparent material, the CR is 0.0, while for an entirely opaque material, the CR is 1.0 …”

Section: Methodsmentioning

confidence: 99%

Optical and Mechanical Properties of Newly Developed Monolithic Multilayer Zirconia

Elsaka

2017

Journal of Prosthodontics

View full text Add to dashboard Cite

show abstract

“…[33][34][35][36][37] A very high and statistically significant correlation was found between the spectrophotometer and digital imaging analysis for all CIE L*a*b* color values. 27,38 Translucency is material-and thickness-dependent 9,39,40 and vary according to the measuring techniques. 41 Values of zirconia TP reported with spectrophotometer are highly variable and range from 0.23 to 9.66 at 1.5 mm of thickness 42 and from 15.1 to 5.5 for thicknesses varying between 0.4 and 1 mm.…”

mentioning

confidence: 99%

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Shamseddine¹,

Majzoub²

2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

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.

show abstract

Contrast Ratio of Six Zirconia‐Based Dental Ceramics

Cited by 32 publications

References 16 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

Optical and Mechanical Properties of Newly Developed Monolithic Multilayer Zirconia

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Contact Info

Product

Resources

About