Pain present for a minimum of 3 months.The International Headache Societys diagnostic criteria for "headache or facial pain attributed to temporomandibular joint disorder" is similar to the above:
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

Medical imaging
The advantages brought about by diagnostic imaging mainly lie within diagnosing TMD of articular origin. Additional benefits of imaging the TMJ are as follows:
Assess the integrity of anatomical structures in suspicion of disorders
Staging the extent of any pathology
Monitoring and staging the progress of disease
Determining the effects of treatmentWhen clinical examination alone is unable to bring sufficient detail to ascertain the state of the TMJ, imaging methods can act as an adjuvant to clinical examination in the diagnosis of TMD. Plain radiography
This method of imaging allows the visualisation of the joints mineralised areas, therefore excluding the cartilage and soft tissues. A disadvantage of plain radiography is that images are prone to superimposition from surrounding anatomical structures, thereby complicating radiographic interpretation.
Hydrocortisone valerate is a synthetic glucocorticoid corticosteroid and a corticosteroid ester. == References ==