Ankylosis Medical Assignment Help

Ankylosis

[1I1nlcujJ\lIltll ankylosis. lntracapsular ankylosis, or fusion of the joint, leads to reduced mandibular opening that ranges from partial reduction in function to complete immobility of the jaw. Intracapsular ankylosis
results from a fusion  of the condyle, disk, and fossa complex, as a result of the formation of fibrous tissue, bone fusion, or a combination of the two (Fig. 30-17). The most common cause of ankylosis involves macrotrauma,
most frequently associated with condylar fractures. Other causes of ankylosis include previous surgical treatment  that resulted in scarring and, in very rare cases, infectionsEvaluation of the patient reveals severe restriction of maximal opening, deviation to the affected side, and
decreased lateral excursions to the contralateral side. If the ankylosis is the result primarily of fibrous tissue, jaw mobility will be greater than if the ankylosis is a result of bone fusion. . Radiographic evaluati n reveals irregular articular surfaces of the condyle and fossa, with varying degrees
of calcified connection between these articulating surfaces,
This t. e of ankylosis usually involves the coronoid process and ternporalis muscle . .Frequent causes of extracapsular ankylosis arc coronoid
process enlargement, or hyperplasia, and trau “la to the zygomatic arch area. Infection around the ternporalis muscle may also produce extracapsula ankylosis. Patients initially have limitation of opening and
deviation to the affected side. In these’ cases, complete restriction of opening is extremely rare, and limited lateraland protrusive movements can usually be performed ‘ indicating no intracapsular ankylosis. Panoramic radiography generally demonstrates the elongation of a ‘coronoid
process. A submental vertex radiograph may be usec

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