The dental chair is mainly used for oral surgery and examination and treatment of dental diseases. It is mostly electrically powered and consists of eight parts, with the entire machine fixed to the ground by a base plate and connected to the upper part of the dental chair through a support. The movement of the dental chair is controlled by a control switch on the backrest. Its working principle is that the control switch starts the motor to operate and drives the transmission mechanism to make the corresponding parts of the dental chair move. By manipulating the control switch button according to the treatment needs, the dental chair can complete actions such as rising, lowering, tilting, and resetting.
The "people-oriented" design concept of the dental chair is a design philosophy that has emerged in recent years, mainly focusing on convenience, comfort, safety, and hygiene as design objectives.
In terms of convenience, comfort, and safety: high-end chairs generally have multiple personalized operation programs, which can set different treatment positions (upper and lower jaw teeth and emergency positions) based on the physician's individual habits and can be programmatically stored. The control part of the dental chair has evolved from initial mechanical and electric control to advanced control stages such as air valve control and solenoid valve control.
High-end electric dental chairs usually also come with a fully automatic control console, which can adjust the chair position through comprehensive movements of the backrest and knee joints, as well as up and down, tilt adjustments. This makes the patient's posture more suitable for treatment. It also comes with an anti-slip doctor's chair and a multi-functional foot control device, which allows the doctor to control the water and air gun switches with their feet as needed during treatment, without the need to stop the instrument operation. High-end treatment tables also come with a variety of directional cold light lamps, powerful low-frequency vacuum negative pressure pumps that can effectively separate air and liquid, resulting in strong suction with minimal noise.
In terms of hygiene and environmental protection: epidemiological data shows that there are serious cross-infection problems in oral diagnosis and treatment. The infection rate of dentists with hepatitis B is 3-6 times higher than that of the general population. The HBV positive rate of dentists is 25.8%, and the overall HBV contamination rate of dental phones is 62%. Therefore, preventing cross-infection of dental equipment is an important factor to consider in the design of dental chairs.
Traditional dental chairs are usually simple dental treatment machines, which are more common in towns and individual clinics with limited resources. Older chairs generally do not have doctor and assistant seats, and some do not even have sputum cups or saliva suction devices, becoming literal "dental chairs." Although these chairs are simple, they can meet the general dental treatment needs.