Materials like a dentin bonding agent or liner should be placed before composite restoration if the dentin is exposed to protect the pulp and ensure restoration longevity.
Before the placement of a composite restoration if the dentin has been exposed, materials such as a dentin bonding agent or a liner are often placed to protect the pulp and promote better adhesion of the restoration.
Exposing the dentin can lead to sensitivity and potential pulp damage, so these materials help in providing a protective barrier before placing the composite restoration.
It is essential to treat and protect the dentin to avoid further complications and to ensure the longevity of the restoration.
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