Abstract
The term “centric relation” has been around for many years, but few practitioners have had a clear understanding of its meaning. For most it has been simply a rather vague concept of a relationship between the mandibular condyles and the glenoid fossae.In light of current knowledge, however, “centric relation” can now be understood as an “orthopedic position.” It is an arch-to-arch relationship that does not take tooth contacts into account. Centric relation must also be differentiated from “centric relation occlusion” and “acquired occlusion,” both of which are tooth-to-tooth positions, irrespective of condylar position.It must also be recognized that the centric relation orthopedic position can be ideally functional, or physiologic, only when the articular discs are interposed between the condyles and fossae bilaterally. If a disc is displaced, the centric relation position is dysfunctional. For this reason, the definition of “centric relation” should specifically include consideration of the placement of the articular discs.
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