A dental engine is a large chair-side appliance (often including the chair itself) for use in a dentist's office. At minimum, a dental engine serves as a source of mechanical or pneumatic power for one or more handpieces.
Typically, it will also include a small faucet and a spit-sink, which the patient can use for rinsing, as well as one or more suction hoses, and a compressed air/irrigation water nozzle for blowing or washing debris clear of the work area in the patient's mouth.
The equipment possibly includes an ultrasonic cleaning appliance, as well as a small table to hold the instrument tray, a worklight, and possibly a computer monitor or display.
Due to their design and usage, dental engines are a potential source of infection from several kinds of bacteria, including Legionella pneumophila.
The dental chair is mainly used for inspection and treatment of oral surgery and oral diseases. Electric dental chairs are mostly used, and the action of the dental chair is controlled by a control switch on the back of the chair. Its working principle is: the control switch starts the motor and drives the transmission mechanism to move the corresponding parts of the dental chair. According to the needs of treatment, by manipulating the control switch button, the dental chair can complete the movements of ascending, descending, pitching, tilting posture and resetting.