Introduction. Pi, the golden number, the embodiment of the concealed key of the Universe, has been influencing architecture, painting, sculpture, music and nature since time immemorial. Amongst its many applications, the golden number has had the greatest impact on the harmony of the human body, particularly to Dento-Maxillary Device.   Aim of the study. To enunciate the importance of the golden ratio in dental aesthetic and the necessity of keeping the Divine Proportion when undertaking dental treatments.   Material and methods. The study involved 71 patients from different ages, which were checked with a golden compass, taking measurements to establish in what respect the noncompliance to the golden proportion affects the patients’ physiognomy.  Results. The results indicated that the patients showing a noncompliance to the golden dental proportion also display variations of facial features and physiognomy.   Conclusions. According to the study, it was noticed that respecting the golden proportion in the size and arrangement of the teeth, especially the upper frontal teeth, has a great effect on the outside perception of their smile and their pleasant look.