Impressionmaterial is the basic requirement and widely used dental material in dentistry.
It is used to record a negative replica of the oral cavity and its surrounding tissues.Essential
requirement have a pleasant taste ,esthetic colour,non-toxic,longer shelf
life,dimensional stability,free from deformation etc.There are several
materials available in the market according to their classification like rigid
and elastic. Rigid impression material has impression plaster, zinc oxide
eugenol, impression compound, waxes and non-rigid have alginate, polysulfide,
polyether, silicone, agar hydrocolloid. All these material have their own
specific properties and usage in dentistry. Impression compound is mostly used
in an impression of edentulous mouth, making of the special tray and border
moulding. Zinc oxide eugenol paste is commonly used in the temporary filling,
as an RCT filling material and bite registration.agar can be used as a tissue
conditioner, full mouth impression, cast duplication. Now the turn comes to the
widely used material in dentistry and in other fields also in all over the
world and its alginate. It comes in a normal and fast setting which are used in
impression making with undercuts, to make study models and working cast and for
preliminary impression. It is usually used because of its fantastic properties
like pleasant taste and smell, highly flexible, good elastic recovery, fine
reproduction, poorly adheres to the tray. Lastly, the elastomeric impression
material is also usual material for impression making due to its long setting
time, high tear strength, good flexibility and excellent reproduction of
surface details.
Reference is
taken from Phillips book of dental materials.
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