The word LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. The use of lasers in dentistry has been investigated since 1960s. Initially this technology was used to remove carious enamel and dentin, using the Ruby laser.subsequently lasers of various types i.e. argon, carbon dioxide, Nd:YAG (Neodymium-aluminum-garnet) or Er:YAG (Erbium-yttrium-garnet) producing either continuous radiation or pulsed beams have been introduced, and the number of potential applications in dentistry continues to increase. With a rapid development of laser technology, new lasers with...