REMOVAL OF REMAINING CARIOUS DENTIN OR OLD RESTORATIONS:
It is the elimination of any infected carious tooth structure or faulty restorations left in the tooth after initial cavity preparation.
Caries left in the pulpal/ axial floor is excavated thoroughly making the cavity deeper. 0.75- 1 mm of dentin should cover the pulp. All the infected/ soft dentin should be removed.
Old restorative material should be removed if:
- The material may negatively affect the esthetic result of the new material.
- It weakens the needed retention.
- Secondary caries is present.
- Tooth pulp is symptomatic.
- Periphery of the old restorative material is not intact.