The authors wish to inform the readers of a needed clarification in this published article regarding an error on page 148, Section 4.1.2. Viscosity, monomers and fillers , left column, last paragraph. The sentence should read “Another important aspect of fillers is that the higher the filler content, the lower the shrinkage and shrinkage stress, which has been demonstrated in experimental composites.”

The authors would like to apologize for any inconvenience caused.