Polymerization Srinkage: Clinical Method Used to Counteract Polymerization Shrinkage

In general excellent results cannot be guaranteed when using resin-based composites for posterior restorations. This is due to polymerization shrinkage which can still be regarded as the primary negative characteristics of composites.Sevaral factors responsible for the polymerization shrinkage process may negatively affect the integrity of the resoration.The materials shrinkage is associated with dynamic development of elastic modules, creates stress within the material and its interface with the tooth surface. As a consequence operative sensitivity are clinical drawbacks of resin composite restoration.Evoling improvements associated with resin based composite materials ,dental adhesive, filling and light curing techniques have improved the predictability of such restorations.