High-speed Hand Piece
The high-speed hand piece is capable of up
to 400,000 rpm. It takes friction grip burs
(FG) and has a water cooling facility for the
bur. The water flow supplied to the hand piece
can be varied or switched off completely.
The handpiece provides low torque, which causes the bur to stall
if pressed too hard onto the tooth (over 1-2 ounces of pressure).
It is used for the drilling of access points
into teeth, for high speed sectioning of teeth
during extraction and cutting or re-modelling
The handpiece needs regular lubrication during
the session and can be autoclaved.
The air/water syringe has two buttons - one to control water flow
and one to control airflow.
It allows a stream of water, air or a fine mist.
Slow Speed Handpiece
The slow speed handpiece has an air-driven
motor in the base. It is capable of forward
and reverse movement and speeds of up to 30,000
The control on the collar controls the speed
and direction of the bur.
The slow speed handpiece has a very high torque.
It is difficult to stall and can overheat the
pulp if used for more than a few seconds on
It is very versatile and can accept long HP burs in the nose cone,
polishing cups in a prophy angle and, with the contra-angle, right
angle (RA) burs or any other type of latch tool. Other latch tools
include polishing cups, sanding discs, root canal paste fillers
and diamond discs.
The size and type of air compressor you may require should be considered
at the time of purchase. Reservoirs are available from 4 gallons
to 12 gallons supplying between 6-8 cubic feet/min (CFM).
A small compressor has the advantage of being lightweight, quieter
and cheaper. However, if asked to work beyond its capacity, it will
overheat and cut out. It is often suggested that if the practice
intends to perform restorative work it is best to have an oil-less
compressor, to prevent oil droplets in the airline contaminating
the restorative material.
Compressors are available with motors from 0.5 horsepower (Hp)
to a unit with dual 1Hp motors for heavy use.