Abstract : Temporomandibular joint dislocation account for 3% of all documented dislocations. Traumatic causes of mandibular dislocation may show a slight male predilection as facial trauma is more prevalent overall in men. Anterior dislocations are the commonest type of mandibular dislocation, usually secondary to atraumatic causes. Magnetic resonance imaging has increasingly been used in the investigation of the status of the articular disc to determine if there is internal derangement of the temporomandibular joint, Cone-beam CT-scans are becoming more cost effective and accessible to many dental practitioners. Management of TMJ dislocation must be provided promptly. Non-surgical treatment of temporomandibular disorders remains to be the most effective way of managing over 90% of patients. Regards surgical management, acute antero-medial, medial, lateral, or posterior dislocation can be reduced manually under local or general anaesthesia, analgesic control with or without sedation, although other methods that have been used in literature. Key words : Mandible, jaw, dislocation , prevalence, management.