The Actus 101 chair has been installed in over 10,000 practices worldwide providing support to both dentists and assistants. The Actus treatment unit is available at a reasonable price with maximum functionality. The treatment tray swivels and the height can be adjusted. It allows optimal access to all instruments including the control console for the chair and instrument functions. The chair features four automatic chair positions, foot controls, an instrument holder for the assistant, a comfortable headrest that is removable and inclinable an instrument holder for five instruments includes a three-way spray. Other features include a swivel adjustable, transparent glass cuspidor, automatic tumbler filler and a water heater.