Microscopy of laser effects on hard and soft oral tissues

Lasers are instruments generating high-powerelectromagnetic radiation more often used in biomedicine.This beam, which physical characteristic andpower depend on the generating device and powersupply circuit, may be usefully employed in surgicalfield to easy cut, excise or eliminate soft tissues ortheir portions, and in the treatment of hard tissues,in particular in some therapies of calcified tissues ofteeth. Aim of this chapter is to show the morphological,histochemical, immunocytologic and chemicalphysicaleffects of hard and soft tissues of the oralcavity treated with laser or others instrumentation.