Color Difference Thresholds in Dentistry

Paravina, Rade D.; Ghinea, Razvan; Herrera, José Benavente; Bona, Álvaro Della; Igiel, Christopher; Linninger, Mercedes; Sakai, Maiko; Takahashi, Hidekazu; Tashkandi, Esam; Pérez, María del Mar

doi:10.1111/jerd.12149

Cited by 894 publications

(1,210 citation statements)

References 33 publications

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“…25 This means that 50% of observers will note a perceptual difference between two colors when the DE* is 1.2. Similarly, 50% of observers will determine a color difference to be acceptable at a DE* of 2.7, while the other 50% will consider this color difference unacceptable.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of staining and color changes of a resin infiltration system

Leland

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English

et al. 2016

The Angle Orthodontist

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Objective: To analyze the staining and color changes of a resin infiltrant system used for management of white spot lesions (WSLs). Materials and Methods: WSLs were artificially created on left buccal halves of 48 extracted human teeth. These sites were then treated with resin infiltration (RI) while the right halves of the teeth remained as nonresin (NRI) areas. Six groups were formed (n ¼ 8 teeth/group) and were exposed to the following: red wine, coffee, orange juice, combined staining agents, accelerated aging, and distilled water for 1 week. The teeth were then polished with a prophy cup and polishing paste. Color properties were assessed using a spectrophotometer at baseline (T0), after each exposure (T1), and after polishing (T2). Color difference (DE*) was calculated between each time point for both halves of the teeth (RI and NRI). Data were analyzed with a two-way analysis of variance with presence of resin infiltration and staining agents as the main effects for each time point pair. Multiple comparisons were made with a Bonferroni post hoc test. The level of significance was set at P , .05. Results: The red wine and combined staining agent groups caused the greatest color change between all intervals (P , .05). Significant interactions were recorded between resin infiltration application and staining agents at all time periods (P , .05). The presence of resin infiltration as a main effect did not affect color change between T0 and T2 (P . .05). Conclusions: RI areas showed higher staining susceptibility than did NRI areas. However, prophylaxis had a strong effect on reversing the discoloration of both RI and NRI areas. (Angle Orthod. 2016;86:900-904)

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Section: Discussionmentioning

confidence: 99%

Evaluation of staining and color changes of a resin infiltration system

Leland

Akyalçın

English

et al. 2016

The Angle Orthodontist

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“…Here, we used the CIE L * a * b * system to evaluate ΔE * . Although some recent studies have demonstrated that another measurement system, i.e., CIEDE2000, may provide a better fit than the former in the evaluation of color difference thresholds, 10,18,19,20 many other studies use the CIE L*a*b* color system to analyze color outcomes in dentistry 3,5,21,22,23 because this system features predictability and clinical importance. ΔE * did not increase after 12 months of storage in specimens prepared with the modeling liquids.…”

Section: Discussionmentioning

confidence: 99%

Translucency and color stability of resin composite and dental adhesives as modeling liquids – A one-year evaluation

et al. 2017

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The aim of this study is to evaluate the influence of modeling liquids on the translucency and color shade of resin composites (RCs) after one year of storage. RC specimens were prepared using either a conventional insertion technique (control; without modeling liquid) or a restorative dental modeling insertion technique (RDMIT) with dental adhesives as modeling liquids (Scotchbond ™ Multi-Purpose [SBMP; 3M ESPE] or Adper™ Single Bond 2 [SB; 3M ESPE]). The initial colors of the specimens were obtained with a digital spectrophotometer and the CIEL * a * b * color system, after which specimens were stored (37°C) in distilled water or red wine for 12 months. Color measurements were reassessed after 6 and 12 months of storage, and scanning electron microscopy was performed after 12 months. Translucency and color change (ΔE * ) were calculated and analyzed using ANOVA and Tukey's test (α = 5%). RC samples prepared via RDMIT showed a translucency similar to that of control samples. ΔE * was also less intense for RCs containing SBMP than for RCs containing SB. Specimens stored in wine showed a clear pattern of degradation, especially in the control group, and surface degradation seemed to be less intense for specimens prepared with SBMP and SB than for specimens without. Specimens stored in water did not show clear evidence of surface degradation. RDMIT appears to be an interesting approach to reduce ΔE * in RCs over time without negative effects on the translucency of the material. However, the modeling liquid should feature a hydrophobic composition, similar to that used in the SBMP group, the achieve the best results.

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“…26 ∆E of all groups exceeded the threshold established for color acceptability in dentistry (∆E =2.7). 25 Furthermore, ∆E and opacity of the Nosi and Si groups increased as more amount of ZnOnps was added into PMMA. These changes in the optical characteristics of a material are a common disadvantage of incorporating metal oxide into PMMA.…”

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confidence: 99%

“…The most commonly utilized color system for color assessment is the CIELAB system, which defines the color characteristics as L*, a*, and b*. [20][21][22][23][24][25][26] L* represents brightness, a* represents the red-green coordinates, and b* represents the yellow-blue coordinates. The CIELAB system can mathematically express the color difference (∆E) between the two objects.…”

Section: Introductionmentioning

confidence: 99%