Cie L*A*B* Values in VITA Classical and VITA 3D Master by Two Dental Spectrophotometers

Dias, Susana; Silveira, João; Pereira, Rúben; Cardoso, Ana Beatriz; Mata, António; Marques, Duarte

doi:10.11607/ijp.7235

Cited by 5 publications

(17 citation statements)

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“…A calibrated operator conducted 34 consecutive measurements of each tab from the three different batches of VC and VM using the two digital methods (SS and eLAB), resulting in a total of 102 measurements per tab. All measurements were performed in a dark chamber following a predefined methodology [ 17 , 18 , 21 ].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the limitations of visual colour determination, instrumental methods, such as spectrophotometers, colourimeters, or digital photography, have gained popularity due to their higher accuracy [ 4 , 8 , 15 ]. However, these instrumental methods have a steep learning curve due to their complexity and require specific and expensive technology, which may not always be available to clinicians [ 8 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…SpectroShade Micro (SS, MHT Medical High Technologies, Bologna, Italy), widely used, is an imaging dental spectrophotometer that combines a digital camera and LED spectrophotometer, offering better accuracy compared to devices like EasyShade (VITA Zahnfabrik, Bad Säckingen, Germany) [ 16 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, factors like variations in shade guide tabs and unspecified L*a*b* values for software calibration may affect colour assessment. These objective methods may yield different results, highlighting the need for testing and comparing tooth colour assessment using digital methods to ensure consistent colour conveyance among clinicians and detect potential discrepancies [ 18 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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Different Methods for Assessing Tooth Colour—In Vitro Study

Dias,

Pereira

et al. 2023

Biomimetics

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Colour assessment using digital methods can yield varying results, and it is important for clinicians to recognize the potential variability intra and inter-device. This study aimed to compare the L*a*b* values of VITA Classical (VC) and VITA Toothguide 3D-MASTER (VM) guides using two methods, SpectroShade (SS) and eLAB. Thirty-four measurements per tab were performed by a single operator across three batches of each guide. Intraclass correlation coefficients (ICC) between batches were calculated. Values <0.5, 0.5–0.75, 0.75–0.9, and >0.90 were classified as poor, moderate, good, and excellent reliability, respectively. Results were reported as mean and standard deviation of the L*a*b* values and respective colour differences (ΔE00) for each tab and method. Statistical analyses were performed with an independent t-test, α = 0.05. ICC values between batches were excellent for all L*a*b*, except for a* component in eLAB. There were statistically significant differences between methods in most L*a*b* values. The intra-device mean ΔE00 was 0.5 ± 0.6 for VC, 0.5 ± 0.8 for VM in SS, 1.1 ± 0.8 for VC, 1.1 ± 0.9 for VM in eLAB. The mean ΔE00 inter-device was 4.9 ± 1.7 for VC, 5.0 ± 1.7 for VM. Both methods demonstrated good internal consistency, with high ICC values and low intra-device colour differences, but exhibited high variability between methods, higher for a* the component.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Different Methods for Assessing Tooth Colour—In Vitro Study

Dias,

Pereira

et al. 2023

Biomimetics

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“…Based on this, it is easy to assume that resin composite manufacturers may try to imitate different areas of the shade guide, resulting in shade differences between resin composite brands 22,23 (Figure 3). Furthermore, it has been shown that there are differences between the same shade in different tabs [24][25][26] (Figure 4). Based on those limitations, the Vitapan (Figure 5).…”

Section: Shade Guidesmentioning

confidence: 99%

A practical, predictable, and reliable method to select shades for direct resin composite restorations

Vargas

Saisho

Maharishi

et al. 2023

J Esthet Restor Dent

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Objective: This article describes a practical, predictable, and reliable method to select shades for direct composite restorations using custom shade guides made of resin composite at hand using a process of elimination Clinical Considerations: Esthetics in direct resin composite restorations depends on the clinician's ability to reproduce the shape and shade of natural teeth, thus appropriate shade selection is a must. This method presented in this article simplifies the process of shade selection for direct resin composite restorations. The use of custom shades tabs made of commecially available resin composites, its arrangment and a process of elimination of tabs during shade selection allows the practitioner to obtain the best possible resin composite shade available for every case. Conclusions:The use of custom shade guide tabs and an elimination protocol facilitates and expedites the process of shade selection for direct resin composites Clinical Significance: The article presents a practical, predictable, and reliable method to select shades for direct resin composite restorations for daily practice.

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Bleaching efficacy and quality of life of different bleaching techniques — randomized controlled trial

et al. 2022

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Objectives To evaluate bleaching efficacy and oral health-related quality of life (ORHQoL) of three bleaching systems with similar hydrogen peroxide (HP) concentration for up to 6 months post-treatment. Materials and methods A randomized controlled trial was designed with three parallel groups: group A — in-office 6% HP paint-on varnish; group B — at-home 6% HP with adaptable tray; group C — at-home 16% carbamide peroxide with custom tray. At three different stages (baseline, after bleaching, and 6-month follow-up), ORHQoL was evaluated by the OHIP-14 questionnaire and tooth color of the upper canines and central incisors were measured by two shade guides and a spectrophotometer (measuring CIE L*a*b* with respective color/whiteness differences − Δ E 00 /ΔWI D ). Results were presented as mean and 95% confidence intervals and statistical tests were performed appropriately, considering a significance level of α = 0.05. Results All groups presented significant color differences ( P < 0.05) between all stages, with Δ E 00 /ΔWI D surpassing the perceptibility threshold in 98% cases, with group C’s results being significantly ( P < 0.05) higher when compared to other groups, although with significantly ( P < 0.05) higher values of color relapse. Significative ORHQoL improvements ( P < 0.05) were detected after bleaching in a global analysis with no differences between techniques. Conclusions All techniques presented bleaching efficacy, color stability, and improvements in ORHQoL up to 6 months post-treatment. Clinical significance Clinicians may consider both at-home and in-office bleaching techniques with 6% HP to attain long-lasting satisfactory clinical results while producing positive changes in ORHQoL.

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Cie LAB* Values in VITA Classical and VITA 3D Master by Two Dental Spectrophotometers

Cited by 5 publications

References 0 publications

Different Methods for Assessing Tooth Colour—In Vitro Study

Different Methods for Assessing Tooth Colour—In Vitro Study

A practical, predictable, and reliable method to select shades for direct resin composite restorations

Bleaching efficacy and quality of life of different bleaching techniques — randomized controlled trial

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