Use of Agar as a Dental Impression Material

Abstract

Agar hydrocolloid was the first successful elastic impression material to be used in dentistry. It is an organic
hydrophilic colloid extracted from certain types of seaweed. It is a reversible impression material because of
its property of reversing their physical state, which is reusing the impression material for multiple number of
impressions. It was initially known as “Negacol”, later termed as “Dentacol” when introduced into dentistry