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Curing potential and color stability of different resin-based luting materials
Luis Felipe J Schneider1, Robson Barroso Ribeiro2, Walleska Feijó Liberato3
1Nucleus for Dental Biomaterials Research (NPBO), Veiga de Almeida University, Rio de Janeiro, RJ, Brazil; School of Dentistry, Federal Fluminense University, Niterói, RJ, Brazil.
Summary
This study evaluated resin luting materials for aesthetic restorations. Amine-free cements reduced color change, and pre-heated composites showed the least color variation, indicating good color stability.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Polymer Chemistry
Background:
- Resin-based luting materials are crucial for aesthetic dental restorations.
- Assessing their curing potential and long-term color stability is essential for clinical success.
- Understanding material properties influences the longevity and aesthetics of restorations.
Purpose of the Study:
- To evaluate the curing potential of four resin-based luting materials.
- To determine the color stability of these materials over time.
- To compare traditional dual-activated, amine-free dual-activated, light-activated cements, and a pre-heated composite.
Main Methods:
- Four luting agents were tested: RelyX ARC, RelyX Ultimate, RelyX Veneer, and Filtek Supreme (pre-heated).
- Curing potential was assessed via C=C conversion using infrared spectroscopy, with and without ceramic interposition.
- Color stability was measured using CIELAB and CIEDE2000 methods after 24 hours and 90 days of water storage.
Main Results:
- All materials exhibited high curing potential, with similar ratios between direct and ceramic-interposed light exposure.
- RelyX Ultimate (amine-free) showed lower color difference (ΔEab) compared to RelyX ARC.
- Filtek Supreme (pre-heated composite) demonstrated the lowest color variation (ΔEab 2.1±0.4; ΔE00 1.6±0.2).
Conclusions:
- All tested luting strategies offer high curing potential.
- Amine-free dual-activated resin cements provide improved color stability compared to amine-containing formulations.
- Pre-heated restorative composites exhibit superior color stability for aesthetic restorations.
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