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From an overall structural perspective, dental chair units can generally be divided into two main categories, which is the most basic and common classification method in the industry. • Integrated dental chair unit • Split dental chair unit

The "chair" in a dental clinic is not simply a piece of furniture for sitting or reclining, but a highly integrated medical device system. Its standard name is usually—Dental Chair Unit.

In the oral healthcare equipment system, the dental chair is not an independent, complete piece of equipment; it is merely a component of a larger system. This larger system is called the Dental Chair Unit

Common mechanical failures of dental chair units during long-term use include: • Unsmooth chair height adjustment • Jet-like movements during backrest adjustment • Abnormal resistance in moving parts • Unstable chair positioning

From a holistic perspective, it can be understood as follows: In the core load-bearing and structural components of dental chairs, stainless steel is currently one of the most ideal, mature, and widely accepted materials.

Under standardized use and maintenance conditions, the overall lifespan of a dental chair unit is typically between 8 and 15 years. This is a generally accepted and rational reference range within the industry.