During incremental addition of composite resin,how will each additional increment bond to the previously placed increment of composite?

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During incremental addition of composite resin,each additional increment will bond to the previously placed increment of composite as long as good isolation is maintained and no contaminants are introduced.When resins polymerize,there is a thin layer of unpolymerized resin on the surface,because contact with oxygen in the air inhibits the cure.

During Incremental Addition of Composite Resin,how Will Each Additional Increment