Bur and Handpiece
A final method for removing bone is with a bur and hand-piece.This is the technique that most surgeons use when removing bone for surgical removal of teeth. Relatively high-speed hand-pieces with sharp carbide burs remove cortical bone efficiently, Burs such as no. 557 or no. 703 fissure bur or a no. 8 round bur are used. When large amounts of bone must be removed, such as in torus reduction, a large bone bur that resembles an acrylic bur is used.
The handpiece that is used must be completely sterilizable in a steam autoclave. When a hand piece is’ purchased,the manufacturer’s specifications must be checked carefully to ensure that this is possible. The handpiece should have relatively high speed and torque (Fig. 6-19). This allows the bone removal to he done rapidly and allows efficient sectioning of teeth. The hand-piece must not exhaust air into the operative field as do dental drills. Most high-speed turbine drills used for routine restorative dentistry must not be used. The reason is
that the air exhausted into the wound may be forced into deeper tissue planes and produce tissue emphysema, a potentially dangerous occunence.