Manual dental instrument, dental care unit and method for displaying data using a manual dental instrument

A dental treatment center, comprising a sensor for detecting at least one property of a surface of the tooth to be treated, an evaluation unit (62), a control unit, and a hand instrument (10), said hand instrument (10) being equipped with an illuminating unit (30;

• 34) for illumination, by a spotlight cone (18), of a site to be examined or treated, including in said hand instrument (10) illuminants (30;
• 36) for the purpose of adding colored light, said illuminants (30;
• 36) being controlled by said control unit and said evaluation unit (62) processing information from said sensor and cooperating with said control unit in such a manner that a user of said hand instrument (10) will receive information on the property of the surface of the tooth to be treated by in that colored light is added to the spotlight cone (18).

A method for indicating at least one property of a surface of the tooth to be treated to a user of a dental hand instrument equipped with an illuminating unit (30;

• 34) for illumination, by means of a spotlight cone (18), of the site to be treated, the property of the surface of the tooth to be treated being detected by means of a sensor, the signal from the sensor being evaluated by means of an evaluation unit (62), and the evaluated signal being sent to a control unit which controls display means indicating to the user the property of the surface of the tooth to be treated, wherein colored light is added to said spotlight cone (18) of said illuminating unit (30;
• 34) by the use of illuminants (30;
• 36) as display means.