Objectives: To determine whether water sorption and solubility of a recently introduced self-adhesive cement is comparable to two clinically tested resin composite cements after thermal aging, and if this is affected by the curing mode. Whether water sorption is correlated with color difference and biaxial flexural strength was also investigated.
Methods: Water sorption and solubility of three resin composite cements {RelyX Universal (RUV), (Panavia V5 (PV5), Panavia SA plus (PSA)} were measured after thermal aging. Disk-shaped specimens were either light-cured or autopolymerized (n = 15 per group). Color difference ΔE and biaxial flexural strength were also obtained.
Results: Sorption was highest for RUV (auto: 54.9 ± 9.0 µg/mm, light: 49.7 ± 4.9 µg/mm), followed by PSA (auto: 37.7 ± 1.4 µg/mm, light: 34.5 ± 1.1 µg/mm) and PV5 (auto: 21.7 ± 0.7 µg/mm, light: 22.1 ± 0.4 µg/mm). Light-curing reduced solubility values, particularly for RUV (from 60.7 ± 20.8 µg/mm to 6.4 ± 0.8 µg/mm). Color differences of ΔE > 1.8 (considered clinically not acceptable) were noted after aging for RUV and PSA. Sorption and ΔE values after aging were correlated linearly (R = 0.970). Biaxial flexural strength values were highest for PV5 (light: 153.4 ± 15.9 MPa; auto: 133.2 ± 18.0 MPa) and lowest for RUV (light: 99.3 ± 12.8 MPa; auto: 35.1 ± 8.3 MPa).
Significance: Light-curing has beneficial effects on sorption, color stability, and biaxial flexural strength of resin composite cements. Cements containing 2-hydroxymethacrylate such as RUV and PSA are more prone to water sorption and color changes.
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| http://dx.doi.org/10.1016/j.dental.2024.04.004 | DOI Listing |
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