Centric relation

In dentistry, centric relation is the mandibular jaw position in which the head of the condyle is situated as far anterior and superior as it possibly can within the mandibular fossa/glenoid fossa.

This position is used when restoring edentulous patients with removable or either implant-supported hybrid or fixed prostheses. Because the dentist want to be able to reproducibly relate the patient's maxilla and mandible, but the patient does not have teeth with which to establish his or her own vertical dimension of occlusion, another method has been devised to achieve this goal. The condyle can only be in the same place as it was the last time it was positioned by the dentist if it is consistently moved to the most superior and anterior position within the fossa.

Centric relation is an old concept in dentistry based on an old mechanical viewpoint of dentistry. There are over 26 different definitions of Centric Relation since the term was first developed as a starting point for making dentures. It is not a physiologic position but rather a border position that is used for reproducibility. The Temporomandibular Joint, does not normally function in a Centric Relation position. Long centric is a term that describes a functional position that patients restored in Centric Relation frequently migrate to. Centric Relation is a border position that is inherently unstable. Mandibular fossa is put anterior and superior as possible. (First aid for the NERB I)
Centric Relation believers state that the relationship of the mandible to the maxilla when the properly aligned condyle-disc assemblies are in the most superior position against the eminentiae irrespective of Occlusal Vertical Dimension (OVD) or tooth position.
At the most superior position, the condyle-disc assemblies are braced medially, thus centric relation is also the midmost position. A properly aligned condyle-disc assembly in centric relation can resist maximum loading by the elevator muscles with no sign of discomfort.^[1]

References

1. ^ Functional Occlusion: From TMJ to Smile Design (Hardcover), by Peter E. Dawson (Author), Hardcover: 648 pages, Publisher: Mosby; 1 edition (August 1, 2006), Language: English, ISBN 0323033717, ISBN 978-0323033718

• Davis Henderson, Victor L. Steffel. McCRACKEN's Removable partial prosthodontics, 4th Edition, 1973.

This dentistry article is a stub. You can help Wikipedia by expanding it.v · Categories: Dental anatomy Restorative dentistry Dentistry stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Rottach-Egern Mullaghmore Look at other dictionaries: centric relation — the position of the mandible, obtained principally by operator guidance, in which the condyles are in the rearmost uppermost position in the fossae of the temporomandibular joint. Called also median retruded jaw r., terminal hinge position, and… …   Medical dictionary occluding centric relation record — a registration of centric relation made at the established occlusal vertical dimension …   Medical dictionary centric — Having a center (of a specific kind or number) or having a specific thing as its center (of interest, focus, etc.). [G. kentron, center] * * * cen·tric sen trik adj 1) of or relating to a nerve center 2) of, relating to …   Medical dictionary true centric — centric relation …   Medical dictionary relation — 1. An association or connection between or among people or objects. SEE ALSO: relationship. 2. In dentistry, the mode of contact of teeth or the positional relationship of oral structures. [L. relatio, a bringing back] …   Medical dictionary eccentric relation — eccentric jaw relation any relation of the mandible to the maxilla other than the centric relation; called also acentric r. and eccentric position …   Medical dictionary lateral occlusal relation — the relation of the mandible to the maxilla when the lower jaw is in a position to either side of centric relation …   Medical dictionary median retruded jaw relation — centric r …   Medical dictionary Intent-centric paradigm — The Intent centric Paradigm (ICP) is a research agenda within the field of cognitive science pursued by the Center for Advanced Defense Studies under the direction of Dr. Newton Howard. ICP describes processes which describe how a rational agent… …   Wikipedia interocclusal record centric — a record of the centric jaw position (relation) …   Medical dictionary 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”