Marginal Adaptation of Dual-Cure Composites Using Various Polymerization Modes

European Journal of Prosthodontics and Restorative Dentistry (2026) 34 (04s), 612-616

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

1*
Radoslav Antoňák
MD Dr.Můj Zubař s.r.o., Czech
Republic,
email:
dr.antonak@gmail.com
Lenka Černá
Můj Zubař s.r.o., Czech Republic

Marginal Adaptation of
Dual-Cure
Composites
Using
Various
Polymerization Modes

2

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

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 polymerization 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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Received-16-05-2026 Revised-20-06-2026 Accepted-25-06-20.26

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