ABSTRACT Oral cavity is subjected to various types of diseases worldwide. Materials used to cure such diseases has to be bioactive, inert and in neutral zone, without harming the tooth structure. At present, numerous materials are available with much more capabilities of regeneration, strength and biocompatibility. Such newly emerging materials has the ability not only to restore lost tooth structure, but actively respond to stimuli of oral environment. Such as stress, temperature, moisture and ph. Such materials are called “smart materials”. They are known for their smart behavior such as shape memory, thermochromic, photochromic, magneto rheological,sensitive and biofilm formation. This review article throws light on benefits and application of smart materials in various fields of dentistry.