Limitation or absence of movement of the jaw may result from various causes and may be of short or long standing. It is seen in tetanus, in hysteria, in trigeminal neuralgia and as a reflex effect of pain from an inflammatory process in the mouth, the throat, the ear canal or the parotid gland. Impaction of or disease around a third molar tooth may cause spasm of the muscles of mastication, simulating a true ankylosis. It may be a result of injury or of suppuration in or about the joint and may occur in arthritis and in disease of the middle ear. It may be caused by an inflammatory mass, as in actinomycosis, by a tumor or by an ununited fracture. Other causes of this condition are severe infection of the oral cavity and postoperative reaction following one of the extensive surgical measures necessary in treatment of tumor of the
CHILDREY JH. FALSE ANKYLOSIS OF THE MANDIBLE. Arch Otolaryngol. 1938;27(3):339–342. doi:10.1001/archotol.1938.00650030349009
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