Microscopy of laser effects on hard and soft oral tissues.

Lasers are instruments generating high-power electromagnetic radiation more often used in biomedicine. This beam, which physical characteristic and power depend on the generating device and power supply circuit, may be usefully employed in surgical field to easy cut, excise or eliminate soft tissues or their portions, and in the treatment of hard tissues, in particular in some therapies of calcified tissues of teeth. Aim of this chapter is to show the morphological, histochemical, immunocytologic and chemicalphysical effects of hard and soft tissues of the oral cavity treated with laser or others instrumentation.