Clinical Evaluation of "Cention Forte" Restorative Material

Resin composites, the first choice of material for the restoration of posterior teeth, still have several drawbacks including their polymerization shrinkage and potential failure of the resin-dentin interface leading to secondary caries. Time-saving and simplified restorative procedures are an ongoing demand for posterior applications.The bulk-fill resin based composites (BF-RBCs), has been developed with an attempt to speed up the restoration process by enabling up to 4- or 5-mm thick increments to be cured in one step. The photo-polymerized single-step BF-RBC materials seem to have some limitations in terms of adequate polymerization. Therefore, recently, the use of dual-polymeritzed RBCs that are also suitable for bulk-fill application with additional bioactive properties such as acid-neutralizing ion release has been offered as an alternative to photo-polymerized ones. Cention N (Ivoclar Vivadent, Schaan, Liechtenstein) restorative material is one approach that has been introduced as a new material category for this purpose. The hand mixed form is named as Cention N whereas auto-mixed capsule form is Cention. Both of them are resin based composite materials categorised as 'alkasite'. They are self-curing composites with optional photo-polymerzation for full volume (bulk) placement. Their composition is same with only exception of the concentration of the initiators and the powder liquid proportion. Cention is delivered together with Cention Primer to ensures the retention of the filling independent of the preparation. The objective of this prospective clinical trial is to evaluate the clinical performance of Cention and Cention Primer in restoration of Class I and II cavities.