The causes of microleakage in a composite restoration
Microleakage is technically defined as the passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material applied to it.2
The most common causes of microleakage in composite restorations include:
- Using high-stress restorative materials
- Not achieving adequate isolation throughout the entire procedure
- Not obtaining a tight seal at the floor of the proximal box/gingival margin
- Not using proper technique when placing the restoration