Editing Temporomandibular joint dysfunction (section)

===Diagnostic criteria===
Various diagnostic systems have been described. Some consider the Research Diagnostic Criteria method the gold standard.<ref name="Wassell 2008" /> Abbreviated to "RDC/TMD", this was first introduced in 1992 by Dworkin and LeResche in an attempt to classify temporomandibular disorders by etiology and apply universal standards for research into TMD.<ref name="Anderson 2010">{{cite journal | vauthors = Anderson GC, Gonzalez YM, Ohrbach R, Truelove EL, Sommers E, Look JO, Schiffman EL | title = The Research Diagnostic Criteria for Temporomandibular Disorders. VI: future directions | journal = Journal of Orofacial Pain | volume = 24 | issue = 1 | pages = 79–88 | date = Winter 2010 | pmid = 20213033 | pmc = 3157036 }}</ref> This method involves 2 diagnostic axes, namely axis I, the physical diagnosis, and axis II, the psychologic diagnosis.<ref name="Wassell 2008" /> Axis I contains 3 different groups which can occur in combinations of 2 or all 3 groups,<ref name="Wassell 2008" /> (see table).

McNeill 1997 described TMD diagnostic criteria as follows:<ref name="Mujakperuo 2010" />

* Pain in muscles of mastication, the TMJ, or the periauricular area (around the ear), which is usually made worse by manipulation or function.
* Asymmetric mandibular movement with or without clicking.
* Limitation of mandibular movements.
* Pain present for a minimum of 3 months.

The International Headache Society's diagnostic criteria for "headache or facial pain attributed to temporomandibular joint disorder" is similar to the above:<ref name=ICHD-2 />

* A. Recurrent pain in one or more regions of the head or face fulfilling criteria C and D
* B. X-ray, MRI or bone scintigraphy demonstrate TMJ disorder
* C. Evidence that pain can be attributed to the TMJ disorder, based on at least one of the following:
** pain is precipitated by jaw movements or chewing of hard or tough food
** reduced range of or irregular jaw opening
** noise from one or both TMJs during jaw movements
** tenderness of the joint capsule(s) of one or both TMJs
* D. Headache resolves within 3 months, and does not recur, after successful treatment of the TMJ disorder