TOPIC: DENTAL IMPRESSION 

📌KEY POINTS:

🔹A negative record of the tissues of the mouth

🔹Used to reproduce the form of the teeth & surrounding tissues. 

🔹Negative reproduction of the tissues given by the impression material is filled up with dental stone or other model materials to get a positive cast.

🔹Positive reproduction of a single tooth is described as a ‘die’, and when several teeth or a whole arch is reproduced, it is called a ‘cast’ or ‘model’

🔹Application of dental impression compound has also decreased with the increased use of rubber impression materials, which can also be electroformed to produce metal dies.