LASERS have become an integral part of dentistry. LASER is an acronym for ‘Light Amplification by Stimulated Emission of Radiation’. Invention of LASER dates back to as early as 1917, when Albert Einstein put forward the theory of photoelectric amplification could emit a single frequency. The primary action of lasers on dental tissue is dependent on how well the chromophore (water, apatite minerals, pigmented substances, etc.) is absorbed by the laser tissue. Laser has various applications in endodontics, operative dentistry, periodontics, orthodontics, etc.