“Laser” is an acronym that stands for “light amplification by stimulated emission of radiation”.1 The photons that make up a laser beam are coherent, amplified in phase (standing wave) and of a specific wavelength (monochro-matic). Laser has been used in dentistry for over two decades.2 Dental lasers are categorised according to their active medium and wavelengths. The currently available dental lasers are diode lasers (445, 635 and 810–980 nm), potassium titanyl phosphate lasers (532 nm, green), neo-dymium-doped yttrium aluminium garnet (Nd:YAG) la-sers (1,064 nm), erbium lasers (2,780 and 2,940 nm) and carbon dioxide (CO2) lasers (9,300 and 10,600 nm). Each laser wavelength has a specific thermal output and a particular tissue interaction...
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