Resumen en español

The term Laser means light amplifed by stimulated emmiting radiation. It has been used for the last 30 years in different medical areas, including dentistry. Basically it transfers an external energy in lightning or luminic energy. There are two types of laser: surgical and therapeutic. The biological reactions of the different tissues, depend on their optical cualities. In dentistry, it has been used in endodontics to clean seal accesory canals; in operative dentistry: as analgesic antiinflamatory in surgical procedures. Taking into account the cautions recommended, it offers a good choise of treatment for our patients.(AU)