Articulators are mechanical instruments that represent the maxilla, mandible and TMJs. Their main task is to provide a frame where it is possible to relate, in the three planes of space, the maxillary cast with the mandibular cast relative to the hinge axis of the patient and of the instrument. An articulator serves as a patient in the absence of the patient because it can be programmed with patient records that allows the operator to fabricate a restoration that will be physiologically and psychologically successful.