Can veneers go over old composite bonding?
Not over it — old resin is usually removed during preparation, because porcelain bonds strongest to clean enamel.
Many people arrive at a veneer consultation with composite bonding already on their front teeth from years past. The bonding does not block veneers, but it does not stay either: aged resin is a weaker gluing surface than enamel, so it comes off as the tooth is prepared.
Why the old resin changes the plan
What matters is what the bonding was hiding. If a large filling or deep chip sits underneath, removing the resin may reveal a tooth with too little enamel left for a veneer, shifting the plan toward a crown or a fresh composite build-up first.
How much sound enamel survives under old restorations varies case by case — individual histories of decay and repair differ. Ask the dentist at your consultation to map the existing bonding on X-rays first, so the veneer plan is built on what is really there.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.