TMJ Ankylosis – Aetiopatholoy and Causes

Aetiopathology of TMJ Ankylosis is a very vast subject as there can be many direct and indirect causes here we are going to discuss the various Aetiological and pathological causes of TMJ Ankylosis

TMJ Ankylosis is the Decrease in mobility of the Temporo mandibular joint either uni lateral or bi lateral which is caused by many factors. There is Fusion of the Condylar head to the Glenoid Fossa either by Osseous deposition or Fibrous Growth which are the main factors in determining the Treatment plan and the Prognosis of the disease. TMJ ankylosis is usually painless but sometimes there may be pain if the joint gets infected. There are 2 types of TMJ Ankylosis mainly True and False.

Click here for: Clinical features of Unilateral and Bilateral TMJ Ankylosis

Aetiopathology of TMJ Ankylosis:


  • Congenital
  • At Birth – Forceps Delivery causing injury to TMJ
  • Haemorthrosis (Direct/Indirect Trauma)
  • Condylar Fractures – Intracapsular, Extracapsular
  • Glenoid Fossa Fracture (Very Rare)


  • Otetis Media
  • Parotitis
  • Tonsilitis
  • Foruncle
  • Abscess around the joint
  • Osteomyelitis of the Jaw
  • Actinomycosis


  • Rheumatoid Arthritis
  • Osteoarthritis
  • Septic Arthritis – Hematogenous spread

Systemic Disease:

  • Small Pox
  • Scarlet Fever
  • Typhoid
  • Gonococcal Arthritis
  • Scleroderma
  • Beri-Beri
  • Marie-Strumpell Disease
  • Ankylosing Spondilitis

Rare Arthritis:

  • Polyarthritis
  • Measels

Other Causes:

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