Define the Materials Used in Perforation Repair
1- Barrier material:
- Restorable barrier.
- UN Restorable barrier
2- Function of barriers:
- provide maemostasis and produce a "dry field"
- provide an internal matrix or "back stop" to condense reparative restorative materials against.
3- Other haemostatic materials:
- Collagen
- Calcium sulfate
- Calcium hydroxide
- Freeze-dried bone
- MTA