Centric relation
In dentistry, centric relation is the mandibular jaw position in which the head of the condyle is situated as far anteriorly and superiorly as it possibly can within the mandibular fossa/glenoid fossa.
It is defined as, "The maxillo-mandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective discs with the complex in the anterior-superior position against the slopes of the articular eminences. This position is independent of tooth contact. This position is clinically discernible when the mandible is directed superiorly and anteriorly. It is restricted to a purely rotary movement about the transverse horizontal axis". — GPT.