Final answer:
The centric relationship of the upper and lower arches is obtained in the centric relation registration in dentistry.
Step-by-step explanation:
The centric relationship of the upper and lower arches is obtained in the centric relation registration.
In dentistry, the centric relation is a repeatable jaw position that serves as a reference point when evaluating the occlusion of a patient's teeth. It is determined by the interaction of the temporomandibular joint and the way the upper and lower teeth come together.
For example, when a dentist takes an impression of a patient's teeth to fabricate a dental crown, they usually use the centric relation as the reference for the bite registration, ensuring an accurate fit of the dental restoration.