Properties of Composite Resins Early After Curing: Color Stability, Degree of Conversion, and Dimensional Stability
Year: 2025
Type: article
Abstract: Objectives: This study assessed the degree of conversion (DC), color, and dimensional stability, of three composite resins early after curing. Materials and Methods: This study was conducted on X‐tra fil, Filtek Z250, and Filtek Ultimate composites. To measure DC, the absorption spectra of composites before and after curing (immediately, 15 min, 2 h, 6 and 24 h, 1 week, and 1 month) were recorded by ATR‐FTIR. Fifteen specimens were fabricated for each composite and assigned to two experimental groups (15 min immersion in coffee immediately and 2 h after curing) and a control. The CIE color parameters of each specimen and color change ( ∆E ) were measured at the aforementioned time points. Dimensional changes were measured by a digital micrometer. Respective ANOVA and Tukey tests were used for analysis. p < 0.05 was considered significant. Results: All composites exhibited an increased DC and expansion over time ( p < 0.001). At 1 month, the ∆E of composites immersed in coffee after 2 h was not significantly from the control group. In the immediate coffee immersion group, X‐tra fil experienced significantly greater ∆E than Filtek Ultimate ( p = 0.02). No other significant differences were found. Conclusion: Time of exposure to coffee after curing had a significant effect on the color stability of X‐tra fil only. X‐tra fil showed minimum dimensional changes after 1 month.
DOI: 10.1155/ijod/3702687
Authors: Sahar Amirinejad, Narges Panahandeh, Hassan Torabzadeh
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $1,560
OpenAlex ID: W4412774684