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The treatment is influenced by the nature of the original lesion, the variety of the ankylosis, and the attitude of the joint. When there is restriction of movement due to fibrous adhesions, these may be elongated or ruptured. Elongation of the adhesions may be effected by manipulations, exercises, and the use of special forms of apparatus such as the application of weights to the limb.
Diseased synovial membrane is removed with the scissors or knife. If the cartilages are sound, and if a movable joint is aimed at, they may be left; but if ankylosis is desired, they must be removed. Localised disease of the cartilage should be removed with the spoon or gouge, and the bone beneath investigated.
Forcible breaking down of adhesions under anæsthesia is not recommended, as it is followed by great suffering and the adhesions re-form. Operation for ankylosis arthroplasty should not be undertaken, as the ankylosis recurs. Tuberculous disease of joints results from bacillary infection through the arteries.
When these are of extreme degree, locomotion is effected in most curious ways. Ankylosis at unnatural angles and even complete reversion of the joints has been noticed. Pare gives a case of reversion, and of crooked hands and feet; and Barlow speaks of a child of two and three-quarter years with kyphosis, but mobility of the lumbar region, which walked on its elbows and knees.
Bony ankylosis of the joints of a finger, whether the result of injury or disease, is difficult to remedy by any operative procedure, for while it is possible to restore mobility, the new joint is apt to be flail-like. Locking. A joint is said to lock when its movements are abruptly arrested by the coming together of bony outgrowths around the joint.
The best possible result being rigid ankylosis in a good position, it may be advisable to bring this about artificially by arthrodesis or resection. Operation is indicated when only one joint is affected and when the cord lesion is such as will permit of the patient using the limb.
It is ultimately converted into ordinary connective tissue pari passu with the absorption of the fat. The fascia lata of the thigh is widely and successfully used as a graft to fill defects in the dura mater, and interposed between the bones of a joint if the articular cartilage has been destroyed to prevent the occurrence of ankylosis.
In the hand, and more rarely in the foot, when one or other of the main nerve-trunks has been divided or compressed, the joints may become swollen and painful and afterwards become stiff and deformed. Bony ankylosis has been observed. In Affections of the Spinal Medulla.
The articular cartilages may subsequently be transformed into connective tissue, with consequent fibrous ankylosis and obliteration of the joint. The bones are affected only in so far as they undergo fatty atrophy from disuse of the limb, or alteration in their configuration as a result of partial dislocation. Osseous ankylosis may occur, especially in the small joints of the hand and foot.
It is only in cases of severe injury, where the articular portions of the bones are damaged at the time of infliction of the injury, and where the articulation remains exposed for weeks at a time, together with immobility of the parts because of attending pain, that permanent ankylosis results.
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