Articulator is a mechanical device that represents the temporomandibular joints and the jaw members to which maxillary and mandibular casts may be attached to simulate some or all the mandibular movements. Many devices that are called articulators do not satisfy this definition. Some of these devices make no attempt to represent the temporomandibular joints (face bow transfer) or their paths of motion (eccentric registration). In the present review, we aim to summarize important aspects of articulators.