Details

Autor(en) / Beteiligte

• Perez, María del Mar
• Ghinea, Razvan
• Herrera, Luis Javier
• Ionescu, Ana Maria
• Pomares, Héctor
• Pulgar, Rosa
• Paravina, Rade D

Titel

Dental ceramics: A CIEDE2000 acceptability thresholds for lightness, chroma and hue differences

Ist Teil von

• Journal of dentistry, 2011-12, Vol.39, p.e37-e44

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2011

Quelle

MEDLINE

Beschreibungen/Notizen

• Abstract Objectives To determine the visual 50:50% acceptability thresholds for lightness, chroma and hue for dental ceramics using CIEDE2000( KL : KC : KH ) formula, and to evaluate the formula performance using different parametric factors. Methods A 30-observer panel evaluated three subsets of ceramic samples: lightness subset (|Δ L ′/Δ E00 | ≥ 0.9), chroma subset (|Δ C ′/Δ E00 | ≥ 0.9) and hue subset (|Δ H ′/Δ E00 | ≥ 0.9). A Takagi–Sugeno–Kang Fuzzy Approximation was used as fitting procedure, and the 50:50% acceptability thresholds were calculated. A t -test was used in statistical analysis of the thresholds values. The performance of the CIEDE2000(1:1:1) and CIEDE2000(2:1:1) colour difference formulas against visual results was tested using PF/3 performance factor. Results The 50:50% CIEDE2000 acceptability thresholds were Δ L ′ = 2.92 (95% CI 1.22–4.96; r2 = 0.76), Δ C ′ = 2.52 (95% CI 1.31–4.19; r2 = 0.71) and Δ H ′ = 1.90 (95% CI 1.63–2.15; r2 = 0.88). The 50:50% acceptability threshold for colour difference (Δ E ′) for CIEDE2000(1:1:1) was 1.87, whilst corresponding value for CIEDE2000(2:1:1) was 1.78. The PF/3 values were 139.86 for CIEDE2000(1:1:1), and 132.31 for CIEDE2000(2:1:1). Conclusions There was a statistically significant difference amongst CIEDE2000 50:50% acceptability thresholds for lightness, chroma and hue differences for dental ceramics. The CIEDE2000(2:1:1) formula performed better than CIEDE2000(1:1:1).