When making a work of art, you cannot quantify it by subjectively asking the patient to assess the efficiency of the rehabilitation, because the data remains limited to personal feelings, which are often conditioned by several variables, and such assessments are worthless from a legal perspective too. An alternative is to quantify the efficiency of the work via confirmation of an objective fact. The next day, the patient described above came to finalise the restoration work, but in this context, was subjected to electrophysiological tests for confirmation of the objective trigeminal data concerning masticatory efficiency. The overlapping of the Gaussian curves for the silent mechanical period tested are a guarantee, both for the work as well as for the patient. From a legal point of view, for example, we can see that the controversial maxillofacial-dental separation discussion can no longer blame the dentist for an incongruous prosthetic rehabilitation once the trigeminal reflexes have responded in a specifically symmetrical manner.