In the 1920s, integrated dental treatment machines appeared, and quickly became widely used in the affluent class. Dental integrated treatment table is only a single function dental chair based on the development of integrated equipment, in addition to the above rope wheel three-curved arm dental drilling machine, but also equipped with oral lights, mouthwash, spittoon, instrument trays, water gun, saliva suction and foot control switches, etc., the emergence of integrated treatment table once again to improve the performance of the use of dental drills and hygiene conditions. This dental chair from the mechanical transmission to the level of electric motor, water gun and saliva absorber power from the air compression pump, this electric air pump dry sound, poor stability, but its comprehensive treatment function has been greatly improved. However, even if the speed of 10,000r/min is already high for the motor, but can only provide 0.8m/s cutting speed, beating cutting, cutting and grinding operation, the patient still feels uncomfortable.
High-speed handpiece appeared in the 1950s, after several developments, high-speed turbine handpiece speed has reached up to 300,000 rpm, and its good safety and comfort was quickly accepted by the dentist and the patient **** with. Modern dental treatment equipment to pneumatic electronic control of the main stem, and electric dental chair connected body, not only with cutting and polishing with high and low-speed handpiece, but also can be equipped with scaler, light curing device and negative pressure suction system, etc., to become a more complete combination of dental treatment equipment.