Lasers have been used in dentistry for removing hard tooth tissue for more than twenty years. In particular, the arbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser, which has a wavelength of 2.78 μm, has been shown to offer the advantages of straight, clean and precise hard tissue cuts [1]. Due to its long wavelength, the absorbed laser energy is limited within a very thin layer of the irradiated tissue and therefore, high temperature elevations (>100°C) at the surface results in hard tissue ablation. Recently, lasers have also been used to prepare a clean root canal surface as well as in disinfection and elimination of bacteria from the root canal system [2].

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