Dental color matching: A comparison between visual and instrumental methods

Igiel, Christopher; Weyhrauch, Michael; Wentaschek, Stefan; Scheller, Herbert; Lehmann, Karl Martin

doi:10.4012/dmj.2015-006

Cited by 66 publications

(67 citation statements)

References 43 publications

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“…A spot‐measuring device illuminates an area 5 mm in diameter and fades out the rest of the object so that only the light from the targeted surface is reflected back into the instrument, thus influencing instrumental shade identification. Consequently, the positioning and angulation of the probe or mouthpiece is critical to the reliability of instrumental readings …”

Section: Discussionmentioning

confidence: 99%

“…Consequently, the positioning and angulation of the probe or mouthpiece is critical to the reliability of instrumental readings. 1,2 The second parameter of measurement uncertainty-accuracy, which is related to actual best matches, was not evaluated in this study.…”

Section: Discussionmentioning

confidence: 99%

“…Obtaining a good color match between restorations and natural teeth is of great importance for the patient and a key factor in acceptance of the restoration. The increase in esthetic demands of patients has led to positive developments in ceramics and composite resin materials . Equally important is the accurate evaluation of whether the color of the reference tooth is correctly selected and communicated.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in esthetic demands of patients has led to positive developments in ceramics and composite resin materials. 1 Equally important is the accurate evaluation of whether the color of the reference tooth is correctly selected and communicated.…”

Section: Introductionmentioning

confidence: 99%

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Reliability of visual and instrumental color matching

Igiel

Lehmann

Ghinea

et al. 2017

J Esthet Restor Dent

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This study evaluates the ability of observers to consistently match the same shade visually and with a dental spectrophotometer in different sessions. The intra-rater and inter-rater reliability (agreement of repeated shade matching) of visual and instrumental tooth color matching strongly suggest the use of color matching instruments as a supplementary tool in everyday dental practice to enhance the esthetic outcome.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reliability of visual and instrumental color matching

Igiel

Lehmann

Ghinea

et al. 2017

J Esthet Restor Dent

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“…41 However, when L*, a*, and b* are integrated within the formula used to compute ΔE, method-related differences were in a range of clinical acceptability. 51 Since TP uses the same formula as ΔE, it is likely that TP values obtained with digital image analysis would be similar to those measured with clinical spectrophotometer. 38 The experimental setup used in the present investigation applied what is generally accepted as ideal lighting conditions and image capturing settings, 52 thus optimizing color coordinates reading.…”

Section: Discussionmentioning

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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Effect of previsualization technique on different types of veneering porcelain

Saleh

El-Etreby

Morsi

2021

Color Research & Application

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Matching a porcelain restoration is a difficult task for both the dentist and the dental technician. In order to improve communication, it was suggested that a new previsualization technique with a new modeling liquid could be introduced. This study investigates the effect of this modeling liquid on color, translucency, and biaxial flexure strength on different types of veneering porcelain. A total of 42 samples were tested for IPS e.max veneered discs, feldspathic discs and the porcelain fused to metal discs. Twenty‐one were prepared with the manufacture liquid, while the other 21 were prepared with Visual‐Eyes modeling liquid. The porcelain powder was prepared for the Visual‐Eyes liquid by removing the food dyes with a specific firing cycle recommended by the manufacture. The porcelain mixes were layered using standardized Teflon molds of different thicknesses. The color and translucency and the biaxial flexure strength were tested. The results revealed statistical significance in the translucency between the liquids in all types of veneering porcelain. The manufacturer's liquid showed higher translucency than Visual‐Eyes liquid; however, the color difference and the biaxial flexure strength were similar between the two liquids. The use of the Visual‐Eyes liquid is indicated in specific cases of complicated build‐ups. This study has targeted a material that has never been investigated before. The material was invented several years ago and updated to the new liquid, but its effect on porcelain is still unknown.

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Dental color matching: A comparison between visual and instrumental methods

Cited by 66 publications

References 43 publications

Reliability of visual and instrumental color matching

Reliability of visual and instrumental color matching

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Effect of previsualization technique on different types of veneering porcelain

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