New low seat and wide seat design. Both air negative pressure suction and water negative pressure saliva suction are equipped with cleaning filter device, which has the function of sediment filtration. Built-in pure water system, suitable for aseptic operation in treatment. The whole machine is a full computer control system, and the main control panel on the instrument plate has operation keys such as personalized memory position, reset, spitting position, dental chair lifting, pitching, cold light, mouthwash, heating water, flushing pelvis and so on. The dental chair power system adopts Danish LINAK linear mute motor for safe and stable movement. The safety system of the treatment machine is equipped with machine-chair interlocking device to effectively ensure the safety of doctors and patients and prevent accidents. The dental chair is designed for double armrests, in which the outer armrest can be opened as needed. The headrest can be adjusted and locked at will.