The invention relates to a data arrangement in connection with dental care, which arrangement includes at least one dental-care device (U, T) and a data system (S). In the arrangement, information related to a predetermined dental treatment event performed by the dental care device (U, T) is transmitted and stored in the data system (S), such as data of device parameters, instruments (X) or filling material (Y) or time used in the procedure. In the arrangement, the treatment event may be identified, for example, via the control system of the dental-care device (U, T) or by reading an identifier by means of an electronic reader device (L1, L2). The information related to the dental procedure is stored in the data system (S) patient-, instrument- or material-specifically so that it may be utilised afterwards, in case required.
