It is the negative replica of the structures of the oral cavity be it hard(tooth) or soft(gingiva, mucous membrane) structures, which are used to fabricate the cast or model of the patient, and for making crowns, dentures, and other prosthesis.
Materials used for taking Impression:
The most commonly used material is
Zinc oxide Eugenol– It is the ideal material for impression taking.
It is used as it had good flow and can take the impression accurately and is mostly non reactive to most individuals and is palatable to most individuals, and it does not compress the tissues and also does not generate heat.
The other materials used are
- Baseplate wax.
- Impression compound.
- Plaster of paris.
“Making an accurate and detailed impression is the first and most important step in creating superior prosthetic restorations.”