The temporomandibular joint(s) (TMJ) may become dislocated in the perioperative period. Early detection is important for early reduction.


Problem: The condylar process of the mandible undergoes subluxation and is displaced anterior to its normal location in the glenoid fossa, past the articular eminence.


Risk factors for TMJ dislocation:

(1) excessive yawning

(2) forceful insertion or removal of a device (orotracheal airway, laryngeal mask airway, laryngoscope, etc)

(3) history of TMJ joint dislocation

(4) disorder of connective tissue (Marfan’s syndrome, other)

(5) reduced muscle tone secondary to sedation

(6) mandibular retrognathism


The patient:

(1) is unable to close the mouth

(2) experiences moderate to severe jaw pain


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