ABOUT HIGH-SPEED HANDPIECES
They are handheld,air driven handpieces which rotates at a speed
of 2 lakhs to 8 lakhs rpm. They are a precision device used for the removal of
tooth structure efficiently and rapidly with no production of pressure, heat or
vibration.In contrary to slow- speed handpiece they produce less heat and
vibration which avoids injury to the pulpal tissues and also speed up the
procedure. All high-speed handpieces incorporate an air or water spray as a
coolent.Water or air spray are adjusted in a way that it forms a halo to cool
the rotating bur at such a high speed. With the combination of high speed and
water coolant, the working area is made clear and visible to the clinician. Handpieces
mainly have two components, the body and the turbine.
They come in various
varieties like chuck/push, standard/mini/super torque,turbine air rotors and
now ,for the more visibility fibre-optic are introduced in the market. With
high-speed handpieces the bur continues to rotate even after the clinician
removes his foot from pedal controlling air/water spray, its called coast
speed.Most of the handpieces have two holes in the front, its called Borden two
holes handpiece.Now, three holes are introduced which is used to vent out the
excess air from the head of handpieces.
Many materials are used in the manufacture of handpieces like
stainless steel which is stronger and heavier but now titanium is used which is
much lighter, stronger and more resistant to repeated cycles of sterilization.
Handpieces should routinely require cleaning and disinfection.The
lubricant should be used safely to use in the conjunction with steamsterilization at 135 degree Celsius.
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