In 2004 the criteria for a temporomandibular joint (TMJ)-related headache was revised in the International Classification of Headache Disorders.

Criteria for TMJ-related headache disorder - all of the following:

(1) recurrent pain in >= 1 region of the head and/or neck

(2) evidence of a TMJ disorder on imaging studies (X-ray, MRI, bone scintigraphy)

(3) one or more of the following

(3a) (pain precipitated by jaw movements) OR (pain precipitated by chewing hard or tough food)

(3b) (reduced range of motion for TMJ) OR (irregular jaw opening)

(3c) noise from one or both TMJ joints during jaw movements

(3d) tenderness of the joint capsule in one or both TMJs

(4) (resolution of pain within 3 months of successful treatment of TMJ disorder) AND (does not recur)



Irregular jaw opening suggests unilateral reduction in the range of motion for a TMJ.

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