Rotary Instrument
Its mainly used surgical micromotor handpiece mounted and in turn the surgical drills. They have partly replaced the use of chisel and hammer, there are now electric and pneumatic micromotors very sophisticated, are better electrical oral surgery, and have a cooling system based on saline or distilled water to avoid heat and produce bone tissue necrosis.
Handpieces are usually straight, although we use contra, hoses should be protected with sterile bags or plastic clothing (see section on asepsis).

Electrocautery
With them is electrosurgery, are devices that convert alternating electrical current of high frequency heat that is transmitted by a small electrode. The heat applied through the electrode on the tissue produces:
*Court of tissues
*Coagulation of bleeding vessels
*Flare
Electrodes are used in different shapes and sizes, are used to cut thin, which in turn can be straight, circular or ball romboidales.los serve to produce hemostasis of a bleeding site.
The advantages of electrosurgery are producing clean cuts, sterile, nothing or very little bleeding and good healing takes place.
