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. The micro shutter is disposed on the base substrate, and includes a plurality of opening parts and a blocking part. The first and second lockunlock mechanisms are actuated by an electric actuator mounted to the door lock. Finally, a reference current of adjustable temperature coefficient and value is output. The invention also relates to methods of administration of the said compositions to a subject in need of treatment for an inflammatory disorder. Such compositions provide an improved combination of properties, including color, strength, velocity of sound, electrical conductivity, and control of defects.