Dental composites have a wide range of applications in conservative dentistry and endodontics. Along with, best aesthetic properties, they have good compressive strength and resistance to shear forces. With the help newer generations of bonding agents, the adhesive characteristics of composites have greatly improved. But, along with these advantages, there are certain disadvantages of these materials. Polymerisation shrinkage is one of the major disadvantages of composite restorative materials. Due to polymerisation shrinkage the marginal adaptability of the composite to the cavity walls is affected, which in turn gives rise to secondary caries, sensitivity and pulpal pathology. Cavity configuration factor or the C factor is the criteria which is used to measure polymerisation shrinkage.
