An information and control system for use in a dental environment has a dental unit with a number of selectable dental instruments and a control member for controlling their operation, a patient's rest and working positions for a dentist and a dental nurse. A computer is provided for storing treatment protocols listing selectable dental treatments, and for each treatment sequential steps to be performed in the treatment. Treatment and actions are displayed, and protocol control means are provided for inputting commands to the computer means for selection of treatments and actions listed in said protocols.