Articular disorders (intra-articular)
Congenital or developmental disorders
	Condylar hyperplasia
	First and second branchial arch disorders
	Idiopathic condylar resorption
Degenerative joint disorders
	Inflammatory: capsulitis, synovitis, polyarthritides (rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, Reiter syndrome, gout)
	Noninflammatory: osteoarthritis
Disk derangement disorders
	Displacement with reduction
	Displacement without reduction (closed lock)
	Perforation
Infection
Neoplasia
Temporomandibular hypermobility
	Dislocation
	Joint laxity
	Subluxation
Temporomandibular hypomobility
	Ankylosis: true ankylosis (bony or fibrous) or pseudoankylosis
	Postradiation fibrosis
	Trismus
Trauma
	Contusion
	Fracture
	Intracapsular hemorrhage
Masticatory muscle disorders (extra-articular)
Local myalgia
Myofascial pain disorder
Myofibrotic contracture
Myositis
Myospasm
Neoplasia