Whiteness difference thresholds in dentistry

Pérez, María M.; Herrera, José Benavente; Carrillo, Francisco Javier Garrido; Pecho, Óscar E.; Dudea, Diana; Gasparik, Cristina; Ghinea, Razvan; Bona, Álvaro Della

doi:10.1016/j.dental.2018.11.022

Cited by 142 publications

(151 citation statements)

References 28 publications

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“…High positive values of the WI D index indicate higher whiteness values of the specimen while low (even negative) values indicate lower values of whiteness of the specimen . In this study, the 50%:50% AT for ΔWI D values was 2.60 units and the PT for ΔWI D values was 0.72 units …”

Section: Methodsmentioning

confidence: 99%

“…24 In this study, the 50%:50% AT for WI D values was 2.60 units and the PT for WI D values was 0.72 units. 25 When the baseline color measurements were completed, bleaching agents were applied with a syringe (Hayat, Istanbul, Turkey) in equal amounts for standardization and uniformly spread with a cotton applicator (MicroTim, Voco, Cuxhaven, Germany) on the same surfaces of the specimens where the thickness of the gel was approximately 1 mm. After the period required for each of the bleaching procedure; for all groups, specimens were washed with high pressure distilled water and dried with airflow and blotting paper.…”

Section: Methodsmentioning

confidence: 99%

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Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Karakaya¹,

Cengiz

2019

Journal of Prosthodontics

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Purpose To evaluate the effect of in‐office and at‐home bleaching agents on color changes (ΔE00), translucency (TP00), whiteness (WID), surface roughness (Ra), and surface topography (Rsk and Rku) of a resin nano‐ceramic and a polymer‐infiltrated ceramic network CAD/CAM material. Materials and Methods Sixty specimens (6 mm × 7 mm × 1.3 mm) were prepared from Lava Ultimate (LU) and Vita Enamic (VE). The specimens were divided into 6 groups according to the bleaching agents applied (n = 10/group): control, Perfect Bleach Office + (PBO), Opalescence Boost (OB), Perfect Bleach (PB) with 10% and 16% carbamide peroxide and Whiteness Perfect (WP). ΔE00 values were calculated before and after bleaching procedures with a spectrophotometer using the CIEDE2000 formula. ΔTP00 and ΔWID values were calculated for each material. Ra, Rsk, and Rku values of the specimens were evaluated with an Atomic Force Microscope. Two‐way ANOVA was used for statistical analyses of the parameters measured after bleaching. For pairwise comparisons, Tukey test was performed. Results For LU, no statistically significant difference among the ΔE00 values of the groups was observed (p = 1.000). For VE, only WP group presented significantly higher values (2.12 ± 2.66) than the other groups (p < 0.001). For both materials; ΔTP00 values of at‐home bleaching groups were significantly higher than in‐office bleaching groups and control group (p < 0.001). For VE, ΔWID values did not demonstrate statistically significant difference (p = 1.000); however, for LU, PBO applied group showed statistically higher ΔWID values (3.00 ± 2.38) (p = 0.010) and WP applied group showed lower ΔWID values (0.47 ± 0.31) than the other groups (p = 0.030). For both LU and VE, there was no statistically significant difference among the groups regarding Ra (F = 4.544), Rsk (F = 2.369), and Rku values (F = 2.391) (p = 1.000). All of the VE groups presented Ra values higher than 0.2 µm. Conclusions The optical properties of LU and VE after bleaching applications were affected by the contact time with bleaching agents rather than concentration. Bleaching procedure had no effect on the surface properties of these materials.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Karakaya¹,

Cengiz

2019

Journal of Prosthodontics

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“…A variety of visual threshold values have been reported in numerous studies related to teeth, gingiva, and skin as presented in Table and reviewed below, suggesting that a systematic approach and methods of standardizing research are needed. In addition, different color difference formulas have been in use for over 30 years of threshold research in dentistry.…”

Section: Literature Review: Teeth Gingiva Skinmentioning

confidence: 99%

“…In a continuous effort to shed light on whiteness difference thresholds in dentistry, a multi‐center study determined both perceptibility (WPT) and acceptability (WAT) thresholds for whiteness differences using the CIELAB‐based whiteness index for dentistry (WI D ) as reference . A total of 30 dentists and laypersons assessed the whiteness differences of simulated images of stimuli pairs of two adjacent upper central incisors displayed on a calibrated monitor.…”

Section: Literature Review: Teeth Gingiva Skinmentioning

confidence: 99%

“…It did not come as a surprise that teeth and tooth‐colored restorative materials are by far the most popular topic, which includes thresholds for total color difference and color coordinate differences. More recent publications have addressed thresholds related to whiteness indices customized for dental application (WIO, WI D ) and TP . A proposed application and interpretation of these findings is presented in Tables and , respectively.…”

Section: Clinical and Research Application And Interpretationmentioning

confidence: 99%

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Acceptability and perceptibility thresholds in dentistry: A comprehensive review of clinical and research applications

Paravina

Pérez

Ghinea

2019

J Esthet Restor Dent

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394

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Objective: The objective was to provide a literature review on perceptibility and acceptability thresholds in dentistry and corresponding recommendations.Overview: A literature review on visual thresholds included findings on the judgments of the color and appearance of tooth-, gingiva-and skin-colored restorative dental materials. Discrepancies in study design contributed to inconsistencies in the research findings of some studies. These differences are related to (a) number of observers and inclusion criteria, (b) specimen number and size, (c) color measurement instrument and the setup and formulas used, (d) psychophysical experiment, (e) data processing (fitting method), and (f) % perceptibility or % acceptability values. A straightforward, consistent and practical model for the clinical and research application and interpretation of visual thresholds and recommended protocols for threshold research were provided. Conclusions: Visual thresholds are of paramount importance as a quality control tool and guide the evaluation and selection of dental materials and their clinical performance. Although clinical shade matching conditions and method are rarely controlled, research on visual thresholds, especially when aiming to set standards for the profession, must be carefully planned and executed. Clinical Significance: Perceptibility and acceptability thresholds define visual match or mismatch of color, translucency, and whiteness in dentistry. Clinical and research findings cannot be fully interpreted in terms of real-life relevance without comparison with perceptibility and acceptability tolerances.

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Stain resistance and surface roughness of CAD/CAM processed hybrid ceramic

Silva

Vivanco

Tonani-Torrieri

et al. 2020

Color Research & Application

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This study evaluated the stain resistance and surface roughness alteration of a CAD/CAM processed hybrid ceramic. Specimens were fabricated: 30 of resin‐based composite (RBC; Filtek Z350), 30 of ceramic (IPS emax Press) and 60 of hybrid ceramic (Lava Ultimate). Color, translucency (BYK Gardner), whiteness index for dentistry (WID) and surface roughness (Surftest SJ‐201P) measurements were made. Samples were randomly separated into three groups: Coffee staining (3 hours/day), coffee staining + mechanical toothbrushing (3 hours/day‐staining + 40 cycles‐toothbrushing) and storage in distilled water (control), all for 30 days Afterwards, all specimens were polished: RBC (n = 10) with a composite polishing kit (Enhance Dentsply), ceramic (n = 10) with a ceramic one (Eve Diapol), half of the hybrid ceramic (n = 10) with the composite polishing kit and the other half (n = 10) with the ceramic kit. Then, final readouts were obtained. Data was analyzed by two‐way analysis of variance. The hybrid ceramic exhibited intermediate color change after staining (P < .05). The hybrid ceramic presented WID chance similar to ceramic in control group (P > .05). After staining/brushing, the hybrid ceramic polishing with the ceramic kit revealed the greatest translucency change (P < .05). RBC and hybrid ceramic polishing with the resin kit presented similar surface roughness alteration (P > .05), except after staining/brushing (P < .05). Also, ceramic was different from the hybrid ceramic polishing with the ceramic kit (P < .05). The hybrid ceramic showed intermediate staining and roughness compared to the RBC and the ceramic. The ceramic polishing kit was more effective in removing stains from the hybrid ceramic.

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Whiteness difference thresholds in dentistry

Cited by 142 publications

References 28 publications

Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation

Acceptability and perceptibility thresholds in dentistry: A comprehensive review of clinical and research applications

Stain resistance and surface roughness of CAD/CAM processed hybrid ceramic

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