Table 1.

Classification of intra-articular and extra-articular temporomandibular disorders.

INTRA-ARTICULAR DISORDERS	1. Joint Pain	Arthralgia/Arthritis/Osteoarthritis
	2. Joint disorders	Disk disorders/disk displacement	with reduction with intermittent locking without reduction, with limited locking without reduction, without limited locking
		Other hypomobility disorders	Adhesions Adherence Ankylosis (fibrous/osseous)
		Hypermobility disorders	Dislocations (subluxation/luxation)
	3. Joint diseases	Systemic arthritis/condylysis/osteonecrosis
		Degenerative joint disease/osteochondritis dissecans/ synovial chondromatosis/neoplasm
	4. Congenital disorders	Aplasia/hypoplasia/hyperplasia
EXTRA-ARTICULAR DISORDERS	1. Muscle pain	Myalgia/ tendonitis/ myositis/spasm		Local myalgia/myofascial pain/ myofascial pain with referral
	2. Contracture
	3. Hypertrophy
	4. Neoplasm
	5. Movement disorders	Orofacial dyskinesia/oromandibular dystonia
	6. Masticatory muscle pain due to systemic pain disorder	Fibromyalgia Widespread pain