Smart materials have revolutionized many areas of dentistry. The quest for an ideal restorative material leads to the discovery of a newer generation of materials in dentistry called the smart materials. These materials are called smart as they can be altered in a controlled fashion by stimulus such as stress, temperature, moisture, pH, electric or magnetic field. Some of them are biomimetics and can mimic the natural tooth structures such as enamel and dentin. These materials hold a promising future in terms of improved efficiency and reliability and mark the beginning of a new era that is Smart Dentistry.