Predicting the final color of layered resin composites from background-dependent optical measurements: a translucency-informed model
ODONTOLOGY, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s10266-026-01562-6
- Dergi Adı: ODONTOLOGY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, MEDLINE, Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest), Pharma Collection (ProQuest)
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet
Özet
The final color of layered resin composite restorations is influenced by complex optical interactions between composite layers and surrounding backgrounds. Therefore, this study investigated whether background-dependent optical measurements and translucency parameters could be used to predict final color coordinates and assessed model performance in an independent composite system. During model development, five composite shades (D3, D2, D1, E2, and E1) were used in both the 2-mm base and 1-mm top positions, generating all 25 possible ordered bilayer combinations. Background-dependent L*, a*, and b* coordinates and translucency parameters obtained from independent 1-mm and 2-mm layers were used to develop multivariable linear regression models for predicting the color coordinates of 3-mm layered specimens. Model performance was assessed using adjusted R & sup2;, mean absolute error, root mean square error, and leave-one-out cross-validation. Independent-system evaluation was performed using 16 layered combinations from one additional composite system, and predictive accuracy was evaluated using CIEDE2000 color differences (Delta E00). The regression models demonstrated adjusted R & sup2; values of 0.799, 0.843, and 0.964 for the L*, a*, and b* coordinates, respectively. During the independent-system evaluation, the mean Delta E00 value was 0.939 +/- 0.333; 37.5% of the combinations were at or below the perceptibility threshold (Delta E00 <= 0.8), while all combinations (100%) were within the clinical acceptability threshold (Delta E00 <= 1.8). Background-dependent optical measurements and translucency parameters enabled accurate and clinically acceptable estimation of the final color coordinates of layered resin composites. The low prediction errors observed in one additional composite system provide preliminary evidence of predictive performance beyond the development material under standardized experimental conditions.