an x-ray data management unit having a first communication device for retrieving at least x-ray exposure data, and a processing means for processing at least the retrieved data;

an intraoral x-ray generation unit having an x-ray source for exposing at least part of a patient jaw with x-rays; and

an intraoral x-ray acquisition unit having a first x-ray sensor for acquiring x-ray image data of at least part of the patient jaw;

said measurement and data communication device comprising:

a measurement unit configured to measure features related to the x-rays used for exposing at least part of the patient jaw, wherein the measurement unit is arranged between the x-ray source and the patient; and

a second communication device for transmitting the x-ray exposure data which includes the measured features to the x-ray data management unit;

wherein the intraoral x-ray generation unit has a tube head which includes the x-ray source, the measurement and data communication device being detachably attachable to the tube head, and

wherein the measurement and data communication device comprises an insert tube which includes the measurement unit and the second communication device, wherein the insert tube is detachably attachable to the tube head without extending a length of the tube head, wherein the x-ray exposure data further includes information on a presence/absence or a type of the insert tube.