What is a Cariogram? It is a graphical picture illustrating in an interactive way the individual's/patient's risk for developing new caries in the future, simultaneously expressing to what extent different etiological factors of caries affect the caries risk for that particular patient. However, the Cariogram does never specify a particular number of cavities that will or will not occur in the future. It rather illustrates a possible over-all risk scenario, based on what can be expected depending on our interpretation of available information. Cariogram as an interactive PC-program has been developed for educational, preventive and clinical purposes.