Marginal Adaptation of Dual-Cure Composites Using Various Polymerization Modes

Dual-cure composites, polymerization shrinkage, marginal adaptation, bulk-fill, delayed light activation

Radoslav Antoňák
MD Dr.Můj Zubař s.r.o., Czech Republic
email: [email protected]

2Lenka Černá
Můj Zubař s.r.o., Czech Republic

3Daniel Černý
Můj Zubař s.r.o., Czech Republic

Received-12-06-2026
Revised-11-07-2026
Accepted-18-07-20-26

European Journal of Prosthodontics and Restorative Dentistry (2026) 34 (5s), 22–26

Marginal Adaptation of DualCure Composites Using Various Polymerization Modes

This in vitro study evaluated the polymerization shrinkage and marginal adaptation of dual-cure resin cements compared with conventional and flowable composite systems. The effects of immediate and delayed light activation were analyzed under standardized deep cavity conditions. Using 3D-printed cavity models, polymerization-induced detachment was quantified via digital and scanning electron microscopy. Delayed light activation of EnaCem HF significantly improved adaptation to cavity floors, comparable to Surefil SDR Flow, whereas immediate activation led to increased shrinkage and gap formation. These findings suggest that controlled delayed activation of dual-cure composites may reduce polymerization stress and enhance clinical performance in deep restorations.

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