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The impact of delayed placement and resin matrix composition on adhesion between layers of resin composites.

Biomaterial investigations in dentistry · Vallittu S, Garoushi S, Lassila L, Vallittu PK · 2026-07-16

Researchers tested how long gaps between placing successive composite layers and different resin matrix compositions affected the adhesive strength between layers. Short delays (10–60 minutes) improved bonding, while longer delays (24–72 hours) weakened it, with effects varying by resin type.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.

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