Vita easyshade

Manufactured by Vita Zahnfabrik

Sourced in Germany

The Vita Easyshade is a digital shade measurement device. It is designed to accurately determine tooth shade by utilizing spectrophotometric technology. The device provides objective color data to support clinical decision-making.

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Statistica 7, by StatSoft (1 mentions) Cary 5000, by Agilent Technologies (1 mentions)

27 protocols using vita easyshade

Tooth Color Stability After Endodontic Treatment

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In a dark room, color measurements were recorded using a spectrophotometer (Vita Easyshade, Vita-Zahnfabrik, Oberding, BV, Germany), under standardized conditions, using a measuring station, which permits that all spectrophotometer readings are done in the same tooth area. The instrument was calibrated before the measurement in each group.
Seven sessions of color measurements were performed at the following intervals: prior to (T0 = baseline) and after (T1) placement of the endodontic filling material and after 1 week (T2), 1 month (T3), 3 months (T4), 6 months (T5), and 9 months (T6). In order to avoid optical changes caused by dehydration, the excess water was removed briefly by air-drying for 1 s before each measurement. The CIE L^∗a^∗b^∗ data were collected and further analyzed. Color change (ΔE₀₀^∗) values were calculated using the following formula CIEDE2000 for each specimen [11 (link), 12 (link)]:

\begin{matrix} Δ E_{00} (L_{1}^{*}, a_{1}^{*}, b_{1}^{*}; L_{2}^{*}, a_{2}^{*}, b_{2}^{*}) = Δ E_{00}^{12} = Δ E_{00} . \end{matrix}

The L^∗ values describe the luminosity, which varies from black (0) to white (100), while the a^∗ and b^∗ values indicate the chromatic direction red/green and blue/yellow, respectively [11 (link), 12 (link)]. The smaller the ΔE₀₀ value, the lower the color difference between the initial color and the final color of the tooth over time.

Xavier S.R., Pilownic K.J., Gastmann A.H., Echeverria M.S., Romano A.R, & Geraldo Pappen F. (2017). Bovine Tooth Discoloration Induced by Endodontic Filling Materials for Primary Teeth. International Journal of Dentistry, 2017, 7401962.

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Spectrophotometric Evaluation of Dental Layers

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The CIELAB color coordinates of each dentin and enamel monolayer, as well as all bilayer specimens were measured with a spectrophotometer (Vita Easyshade; Vita Zahnfabrik). Measurements were performed by using glycerin as a coupling medium between the dentin and enamel disks and between the dentin disks and the simulated tooth substrate/ background. Glycerin presents a refraction index similar to porcelain, minimizing the light refraction that occurs when the light beam crosses substrates with different refractive indices as air and porcelain (24) . The monolayer and bilayer specimens were evaluated on a white background (L*=93.1; a*=1.3; b*=5.3) and a black background (L*=27.9; a*=0.0; b*=0.0). The bilayer specimens were also evaluated with the simulated tooth substrates with lower value and higher value as backgrounds: C4 (L*=54.9; a*=2.9; b*=25.7) and A2 (L*=79.2; a*=2.5; b*=24.2).

Boscato N., Hauschild F.G., Kaizer Mda R, & De Moraes R.R. (2015). Effectiveness of Combination of Dentin and Enamel Layers on the Masking Ability of Porcelain. Brazilian dental journal, 26(6).

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Standardized Color Measurement Protocol

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The initial color measurement of each specimen was made with a Vita EasyShade spectrophotometer (Vita Zahnfabrik, Bad Säckingen, Germany) calibrated before starting and again after measurement of every 10 samples. Composite discs were placed on a flat white surface inside of a black box in which the spectrophotometer was the only source of illumination. The spectrophotometer tip was always positioned perpendicular to the disc surface. All color measurements were made by the same operator, who was blinded to the composite group allocation. Color variation was established by using the coordinates L (lightness, 0-100), a (-a* = green, +a* = red), and b (-b* = blue, +b* = yellow) of the CIE L*a*b* scale. Calculations were made for ΔL, Δa, and Δb between the baseline. The formulas below were used for the ∆L, Δa, Δb, and ΔE values:

Cevval Ozkocak B.B., Ozkocak I, & Agaccioglu M. (2022). Effects of dyes used in photodynamic therapy on color stability of composite resins. Journal of oral science, 64(3).

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Laser-Assisted Tooth Bleaching Protocol

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Laser White20 gel was formulated by 25 times blending the base and activator syringe contents at room temperature to ensure homogeneity. A 1-mm layer of the Laser White20 gel was smeared and distributed across the surface of CRDs using the micro brush's tip. After that, the surface of CRDs was exposed to a diode laser (Epic X, Biolase, CA, USA) for 30 s, three times each at a distance of 1 mm, and power of 1.5W with a 1-min interval between irradiations. After 7 min, CRDs were washed for 30 s using distilled water.[15 16 (link)]
CRD in which the bleaching agent was not subjected to laser radiation was prepared as previously described. Surfaces were bleached for 20 min. CRDs were washed with distilled water and stored for 7 days in saline, thereafter dried and evaluated colorimetrically with a spectrophotometer (Vita Easyshade, VITA Zahnfabrik, Germany). Color difference was determined using the CIELAB formula:[17 (link)]
ΔE = [(ΔL*)2 + (Δa*)2+ (Δb*) 2]1/2
L* parameter represents the degree of lightness, a* is indicate the redness/greenness, and b* indicates the yellowness/blueness.
SPSS version 21 (Statistical Package for Scientific Studies Inc., Chicago, IL, USA) was used to analyze the data.

Mawlood A.A, & Hamasaeed N.H. (2023). The impact of the diode laser 940 nm photoactivated bleaching on color change of different composite resin restorations. Journal of Advanced Pharmaceutical Technology & Research, 14(2), 155-160.

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Evaluating Wine-Induced Color Change

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The initial (baseline) color of all specimens was evaluated using a digital spectrophotometer (Vita Easyshade, Vita Zahnfabrik, Bad Sackingen, Germany) and the CIEL * a * b * color system. The specimens were measured against a white Plexiglass background to eliminate background light, and the L * (white/black), a * (red/green), and b * (yellow/blue) color parameters were obtained. Subsequently, all specimens were placed into wells of a 24-well plate and immersed in red wine (Concha y Toro, Cabernet Sauvignon 2007, Las Condes, Chile; pH 3.6; 14.5% alcohol by volume) for 12 months. The wine was replaced weekly. After 4, 6, and 12 months of storage, each specimen was washed in distilled water, air-dried, and measured again for color reassessment. The color change after each time point was calculated, as previously described 16 (link) , using the following formula:
, where ΔL * , Δa * , and Δb * are the difference between the final and initial L * , a * , and b * color parameters, respectively.

Sedrez-Porto J.A., Münchow E.A., Brondani L.P., Cenci M.S, & Pereira-Cenci T. (2016). Effects of modeling liquid/resin and polishing on the color change of resin composite. Brazilian oral research, 30(1).

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Standardized Tooth Whitening Evaluation

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L*a*b* values (Commission Internationale de l'Eclairage) were taken for each specimen at baseline, after staining, and after the assigned whitening treatments using a spectrophotometer (VITA Easyshade, VITA Zahnfabrik, Bad säckingen, Germany) with a light beam focus of 0.3 mm. All measurements were performed and repeated three times by one examiner. The baseline L* value was used for stratified randomization of the specimens into four groups. The color difference (ΔE) was calculated after staining (ΔE_staining: staining-baseline) and after the assigned whitening treatments (ΔE_treatment: treatment-staining):

Δ E = {{(Δ L *)}^{2} + {(Δ a *)}^{2} + {(Δ b *)}^{2}}^{1 / 2}

(Karakaya and Cengiz-Yanardag, 2020 (link))

Al-Angari N.S., Quwayhis S., Almayouf N., Meaigel S., Aldahash A, & Al-Angari S.S. (2023). Effect of staining and whitening systems on color stability of computer aided design/computer aided manufacturing lithium disilicate glass ceramic. The Saudi Dental Journal, 35(4), 359-364.

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Shade Guide Comparison for Composite Restorations

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Vitapan Classical (Vita Zahnfabrik), a new shade guide without previous use, was adopted as the standard for calculating color differences (ΔE*) in restorative composites. Prior to the measurement, the metallic stems were removed to avoid interferences on shade readings, and the back of the guide was gently worn to obtain a flat surface.
Three L*, a*, and b* values were measured according to the CIELAB color scale at the middle third for each tooth selected on the shade guide with an intraoral spectrophotometer (Vita Easyshade; Vita Zahnfabrik) on a white background. Three readings were performed for each coordinate, and the average was used to calculate the ΔE of composites. The composite specimens were measured following the same parameters described for the teeth on the shade guide.
After data collection, the final shade of specimens was determined, and so was the ΔE* between each shade of the guide. The corresponding shade of the restorative composite was calculated by the mathematical equation:
The values of ΔE ≥ 3.7 were considered clinically detectable as aforementioned. The ΔE values were separately compared for each shade using one-way analysis of variance and Tukey's post hoc test (α = 0.05).

Melara R., Mendonça L., Coelho-de-Souza F.H., Rolla J.N, & Gonçalves L.D. (2021). Spectrophotometric evaluation of restorative composite shades and their match with a classical shade guide. Restorative Dentistry & Endodontics, 46(4), e60.

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Color Stability of Dental Materials

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A digital spectrophotometer (Vita Easyshade, Vita Zahnfabrik) based on the CIE‐Lab‐color (Commission International de l' Eclairage L*a*b color) system was used for all color measurements against a white background. Color measurements were taken after 6 h and 1, 2, 4, 7, 10, and 14 days. The mean value for the five specimens was calculated. Paired‐sample and independent‐sample t test was used to determine the mean color difference at baseline and at the end of staining between the two materials, whereas two‐way analysis of variance (ANOVA) was used to determine the mean color difference within or between groups of finishing protocols and staining solutions followed by Tukey's honestly significant difference posthoc test at 95% confidence level.

Marufu C., Kisumbi B.K., Osiro O.A, & Otieno F.O. (2022). Effect of finishing protocols and staining solutions on color stability of dental resin composites. Clinical and Experimental Dental Research, 8(2), 561-570.

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Evaluating Ceramic Veneer Color Stability

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The color of each specimen was recorded before and after thermocycling and immersion within the testing solutions. The color of each sample at both intervals was measured at the identical position (disc center) with a portable spectrophotometer (Vita Easy shade, Vita Zahnfabrik H. Rauter GmbH, Bad Sackingen, Germany). The putty index was made over the disc with a window of 3 mm diameter in the center to standardize the area color measurement. The borders of the window were well-formed with sharp edges. On each occasion, the disc color was measured three times. The average value from 3 repeated color measurements was considered the color of the disc. Three color parameters—‘ L’, ‘a’, ‘b’—were recorded for each ceramic veneer following the CieLab color system. The mean color difference because of immersion of the sample was determined by adopting the formula [20 (link)]: ΔE* = ((ΔL*)2 + (Δa*)2 + (Δb*)2) × 1/2, where ΔL* is the variation of L*, Δa* is the variation of a*, and Δb* is the variation of b*. A low ΔE* was considered better shade matching; a score of ≥3.5 was considered acceptable [21 (link)].

Haralur S.B., Raqe S. Alqahtani N, & Alhassan Mujayri F. (2019). Effect of Hydrothermal Aging and Beverages on Color Stability of Lithium Disilicate and Zirconia Based Ceramics. Medicina, 55(11), 749.

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Standardizing Tooth Color Assessment Using Digital Spectrophotometry

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To standardize area and light conditions for color assessment, for each tooth, a custom silicone matrix was fabricated with impression material (Perfil^®, Vigodent S/A, Rio de Janeiro, RJ, Brazil), covering the entire buccal tooth surface. A perforation compatible with the size of the spectrophotometer tip (±6 mm diameter) was made with a cutting-edge cylinder at the crown area^{5 (link)} (Figure 1a-c). Specimens’ colors were assessed using a digital spectrophotometer (Vita Easyshade^®, VITA Zahnfabrik H. Rauter GmbH & Co.KG, Bad Säckingen, Baden-Württemberg, Germany), and following the Commission Internationale de l’Éclairage (CIE) Lab System, to obtain L* (lightness), a* and b* (hue) values.
Figure 1Tooth color assessment devices. (a) Custom silicone matrix covering the entire buccal tooth’s surface, (b,c) with a perforation to fit the spectrophotometer tip.The first color assessment was performed one day after specimens’ preparation and, before the assessment. For this, after removing specimens from distilled water, the excessive moisture of the external dental surface was removed with gauzes. After that, the experiment was performed in three phases:

dos SANTOS L.G., FELIPPE W.T., de SOUZA B.D., KONRATH A.C., CORDEIRO M.M, & FELIPPE M.C. (2017). Crown discoloration promoted by materials used in regenerative endodontic procedures and effect of dental bleaching: spectrophotometric analysis. Journal of Applied Oral Science, 25(2), 234-242.

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