Translucency thresholds for dental materials

Marianne Salas; Cristina Lucena; Luis Javier Herrera; Ana Yebra; Alvaro Della Bona; María M Pérez

doi:10.1016/j.dental.2018.05.001

Translucency thresholds for dental materials

Dent Mater. 2018 Aug;34(8):1168-1174. doi: 10.1016/j.dental.2018.05.001.

Authors

Marianne Salas¹, Cristina Lucena¹, Luis Javier Herrera², Ana Yebra³, Alvaro Della Bona⁴, María M Pérez⁵

Affiliations

¹ Department of Stomatology, Faculty of Dentistry, Campus de Cartuja s/n E-18071, University of Granada, Spain.
² Department of Computer Architecture and Computer Technology, E.T.S.I.I.T. E-18071, University of Granada, Spain.
³ Department of Optics, Faculty of Science, Campus Fuente Nueva, Edificio Mecenas, s/n E-18071, University of Granada, Spain.
⁴ Post-Graduate Program in Dentistry, Dental School, University of Passo Fundo, Campus I, Passo Fundo, RS, Brazil.
⁵ Department of Optics, Faculty of Science, Campus Fuente Nueva, Edificio Mecenas, s/n E-18071, University of Granada, Spain. Electronic address: mmperez@ugr.es.

PMID: 29764698
DOI: 10.1016/j.dental.2018.05.001

Abstract

Objective: To determine the translucency acceptability and perceptibility thresholds for dental resin composites using CIEDE2000 and CIELAB color difference formulas.

Methods: A 30-observer panel performed perceptibility and acceptability judgments on 50 pairs of resin composites discs (diameter: 10mm; thickness: 1mm). Disc pair differences for the Translucency Parameter (ΔTP) were calculated using both color difference formulas (ΔTP₀₀ ranged from 0.11 to 7.98, and ΔTP_ab ranged from 0.01 to 12.79). A Takagi-Sugeno-Kang (TSK) Fuzzy Approximation was used as fitting procedure. From the resultant fitting curves, the 95% confidence intervals were estimated and the 50:50% translucency perceptibility and acceptability thresholds (TPT and TAT) were calculated. Differences between thresholds were statistically analyzed using Student t tests (α=0.05).

Results: CIEDE2000 50:50% TPT was 0.62 and TAT was 2.62. Corresponding CIELAB values were 1.33 and 4.43, respectively. Translucency perceptibility and acceptability thresholds were significantly different using both color difference formulas (p=0.01 for TPT and p=0.005 for TAT). CIEDE2000 color difference formula provided a better data fit than CIELAB formula.

Significance: The visual translucency difference thresholds determined with CIEDE2000 color difference formula can serve as reference values in the selection of resin composites and evaluation of its clinical performance.

Keywords: CIEDE2000; CIELAB; Composite resin; Dental materials; Translucency parameter; Translucency thresholds.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Color Perception / physiology*
Color*
Composite Resins / chemistry*
Dental Materials / chemistry*
Female
Humans
Male
Materials Testing
Middle Aged
Optical Phenomena*
Surface Properties

Substances

Composite Resins
Dental Materials