Determination of VITA Classical shades with the 3D-Master shade guide

Hassel, Alexander J.; Zenthöfer, Andreas; Corcodel, Nicoleta; Hildenbrandt, Achim; Reinelt, Gerhard; Wiesberg, Stefan

doi:10.3109/00016357.2012.715197

Cited by 20 publications

(17 citation statements)

References 12 publications

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“…Dozic et al corroborate these findings in their study and showed that only a minority of students (2 to 47 %) had been introduced to the methods available for digital shade determination [4] . Based on the Munsell-color-system [5] , the tooth selected for shade matching is compared to a current sample of the color scale (reference) at neutral light conditions [6][7][8] . In Munsell's theory; he described color by terms of hue, value and chroma.…”

Section: Methodsmentioning

confidence: 99%

“…Through the determination of lightness (value) in the first level, up to 60 % of incorrect assessment are eliminated. Both further steps, the determination of chroma and hue, reduce color-matching errors with a compliance of almost 70% [6,8] . Clinical studies have demonstrated that the subjective color determination independent of the used color scale, but -in fact -gender-dependent can be learned [9,[10][11][12][13][14] .…”

Section: Methodsmentioning

confidence: 99%

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Influence of Surrounding Conditions on Visual Determination of Tooth Shade

Klinke-Wilberg¹,

Biffar²

2018

JDOC

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Statement of problem: Environmental conditions play a major role for accurate determination of tooth color. However, often underestimated is the impact like intensity of illumination, individual adaptation time as well as the influence of environmental conditions on color determination? Purpose: The aim of this research is to analyze the influence of background color on the visual determination of tooth color. Material and methods: Dental students (N=37) at the Universities in Dresden, Leipzig, Berlin, Olomuc and Greifswald participated in this research. A standardized lecture, followed by the web-based Toothguide-Trainer tool (www.toothguide.de) prepares the students for templates matching with the computer aided "Tooth guide-Training-Box" (TTB, VITA Zahnfabrik).After color matching in neutral grey surrounding (reference), the participants repeated the matching on modified TTBs (red, yellow and blue). Color distance to the selected templates (∆E) was calculated confounded by gender and age. The mean and standard deviation (SD), median and the 95 % confidence interval (95% CI) were calculated using Mann-WhitneyU test (α=.05). Results: Compared with the reference (neutral grey) a color distance (mean ΔE) of 2.45 and standard deviation (SD) ± 2.6, ΔE for red background was 3.35 (± 2.8), blue had a ∆E value of 2.98 (± 2.6). U test showed highest significant differences (P < 001) to the reference. Yellow background showed a mean of ΔE 2.94 (± 2.7) with P <.01. 95% CI for reference was 2.16-2.49, red 3.07-3.44, blue 2.71-3.05 and yellow 2.67-3.02.Odds ratio of misassessment (∆E > 3) for red environment was 2.14 (P < 001), for blue background with 1.73 (P < 001) and yellow with 1.53 (P =.001) significant higher compared with reference (neutral grey).For all background colors ("yellow", "blue", "red"), men needed a significantly longer evaluation time (P < 05, respectively) in color differentiation than for the grey background (reference). Conclusion: The environmental conditions play a major role and influence the visual determination of tooth color significantly. Standardized conditions are required to get exact results in the tooth color differentiation. Clinical implications: Color determination requires "dazzle-free" standard environment conditions (neutral grey environment, day light illumination) to improve the visual color differentiations procedures. Eliminable factors, like colorful outerwear, make-up, colorful walls and ceilings as well as colorful dental instruments have to be avoided.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Influence of Surrounding Conditions on Visual Determination of Tooth Shade

Klinke-Wilberg¹,

Biffar²

2018

JDOC

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“…It is also the first study to report people's preferences of tooth shade hue and chroma for different skin shades. This study revealed that the most preferred tooth shade for anterior teeth is 1M1 in the 3D Master shade guide, which is equivalent to B1 in the Classic VITA shade guide, 30 regardless of the skin shade of the model and their demographic variables. The CIE average values for L, a and b for 1M1 shade tab were measured in a previous study to be around 86.4 (1.0), -0.4 (0.1), and 10.7 (0.3), respectively.…”

Section: Discussionmentioning

confidence: 82%

“…This study revealed that, regardless of the skin shade of the model and their demographic variables, the most preferred tooth shade for anterior teeth is 1M1 in the 3D Master shade guide, which is equivalent to B1 in the Classic VITA shade guide, 30 and the CIE values of L = 86.4, a = -0.4, and b = 10.7. 25…”

Section: Discussionmentioning

confidence: 84%

Tooth Shade Preferences among the General Public

Almufleh

Emami

Al‐Khateeb

et al. 2020

Journal of Prosthodontics

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Purpose To identify laypersons’ most preferred tooth shade as a function of observer and patient factors, namely patients’ skin shade and observers’ socio‐demographics. Materials and Methods Two online surveys using computer‐designed perioral images with different shades of the skin and teeth were distributed to participants in Montreal (Canada) and San Francisco (USA). The first survey (n = 120) was designed to assess public preferences of tooth shade value, hue and chroma as a function of the skin color of the perioral image (model), and the demographic characteristics of the observer. The first survey included 6 sets of 9 identical perioral images. A different skin shade (from very dark to very light) was used for each set of images, and each set of images presented teeth with different tooth shades which included three different levels of value (2M1, 3M1, 4M1), hue (3L1.5, 3M1, 3R1.5), and chroma (3M1, 3M2, 3M3) of the Vita 3D Master shade guide. Participants were asked to choose their preferred image for each category (value, hue, chroma) within each set of skin shades. A second survey was performed to pinpoint the tooth shade that is preferred the most by the general public. In this survey, images with four tooth shades (1M1, 2M1, 3M1, 4M1) and 6 skin shades were distributed (n = 70). Ordinal logistic regression was used to identify significant predictors of preferred tooth shades. Results Most of the participants preferred teeth with the highest value (54%), a neutral hue (59%) and the lowest chroma (89%). About 75% of the participants preferred 1M1 the lightest tooth shade over other shades regardless of their demographics or skin color of the model. Among the observer‐related variable, age was the most significant predictor of people preferred tooth shade (p = 0.019). Conclusion This study showed that there are common preferences in terms of tooth shade value, hue and chroma among participants regardless of demographic variables and facial skin shades. This data could guide dentists for tooth shade selection in the clinical practice.

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“…All the mixtures were formulated to contain a standard loading of inorganic pigments based on metal oxide so that these experimental composites would match the A3 dentin color pattern on the Vita scale [15] . In all preparations, the matrix used belonged to the same production batch, thus avoiding possible changes in composition.…”

Section: Methodsmentioning

confidence: 99%

Obtaining and characterizing dental hybrid composites with clay or silica nanoparticles and boron-aluminum-silicate glass microparticles

Menezes

Silva

2019

Polímeros

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The aim of the present work was the obtaining and characterization of dental hybrid composites using nanoparticles (clay or silica) and boron-aluminum-silicate microparticles. We evaluated the dispersion of the nanofillers when changing their loading among 2.5%, 5%, 10% and 25% wt. Were tested, in the above quantities, four different types of nanofillers, two nanosilicas and two nanoclays The remainder of the inorganic phase, up to a total loading of 75% wt, was given by the boron-aluminum-silicate microparticles. The systems were characterized by XRD, TGA, LF-NMR, and. FTIR was used to determine the degree of conversion. The XRD and LF-NMR showed that the composites with 2.5% of clays, contained an exfoliated profile, and the groups with higher amounts of clay showed intercalated areas or the agglomeration of these particles. Furthermore, the silicas were agglomerated in all groups. The thermal resistance of the material was not affected by the silicas, but improved when using 2.5% of nanoclays. On the other hand, the addition of these particles caused the reduction of the degree of conversion of the systems.

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Determination of VITA Classical shades with the 3D-Master shade guide

Abstract: Within the limitations of the study, it is usually possible to determine tooth color with the 3D and convert it, via a table, into a VC shade without adding a clinically apparent error to the direct shade match with the VC.

Cited by 20 publications

References 12 publications

Influence of Surrounding Conditions on Visual Determination of Tooth Shade

Influence of Surrounding Conditions on Visual Determination of Tooth Shade

Tooth Shade Preferences among the General Public

Obtaining and characterizing dental hybrid composites with clay or silica nanoparticles and boron-aluminum-silicate glass microparticles

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