Science and technology in the 21st century relies heavily on the development of new materials that are expected to respond to the environmental changes and manifest their own functions according to the optimum conditions. Smart materials are an answer to this requirement of environment friendly and responsive materials which alter their properties to perform specific functions. They are called smart because they sense conditions in their environment and respond to those conditions. Dentistry is a branch of science which is heavily dependent on use of various materials to provide treatment solutions of varied nature. Dental practitioners should aware of these innovative materials to enable their use and utilize their optimal properties in day to day practice to provide quality and effective solution to dental problems.