X-ray microtomography analysis of gaps and voids in the restoration of non-carious cervical lesions with different composite resins.

Context (background): Resin composites are the most widely used material for restoring cervical defects. However, the high failure rate of these restorations is still a concern.

Aims: The aim of this in vitro study was to evaluate, using microtomography (μCT), the interfacial gap and voids formation in Class V cavities in premolars restored with materials with lower polymerization shrinkage combined with different restorative techniques.