extracapsular ankylosis

ankylosis /an·ky·lo·sis/ (ang″kĭ-lo´sis) pl. ankylo´ses   [Gr.] immobility and consolidation of a joint due to disease, injury, or surgical procedure.ankylot´ic

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artificial ankylosis  arthrodesis.

bony ankylosis  union of the bones of a joint by proliferation of bone cells, resulting in complete immobility; true a.

extracapsular ankylosis  that due to rigidity of structures outside the joint capsule.

false ankylosis  fibrous a.

fibrous ankylosis  reduced joint mobility due to proliferation of fibrous tissue.

intracapsular ankylosis  that due to disease, injury, or surgery within the joint capsule.

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extracapsular ankylosis

n.

Stiffness of a joint due to hardening or ossification of the surrounding tissues. Also called spurious ankylosis.

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extracapsular ankylosis.

See false ankylosis.

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ankylosis [ang″kĭ-lo´sis] (pl. ankylo´ses) (Gr.)

immobility and consolidation of a joint due to disease, injury, or surgical procedure. adj., adj ankylot´ic. Ankylosis may be caused by destruction of the membranes that line the joint or by faulty bone structure. It is most often a result of chronic rheumatoid arthritis, in which the affected joint tends to assume the least painful position and may become more or less permanently fixed in it. Other causes include infection and traumatic injury to the joint. Artificial ankylosis (arthrodesis), fusion of a joint by surgical operation, is sometimes done to ameliorate the pain experienced in a severe joint condition.

bony ankylosis union of the bones of a joint by loss of articular cartilage, resulting in complete immobility.

extracapsular ankylosis that caused by rigidity of surrounding parts.

false ankylosis (fibrous ankylosis) reduced joint mobility due to proliferation of fibrous tissue.

intracapsular ankylosis that caused by rigidity of structures within the joint.

spurious ankylosis extracapsular ankylosis.

stapedial ankylosis fixation of the footplate of the stapes in otosclerosis, causing conductive hearing loss.

true ankylosis bony ankylosis.

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ankylosis

abnormal immobility and consolidation of a joint.

Ankylosis may be caused by destruction of the membranes that line the joint or by faulty bone structure. It is most often a result of chronic arthritis, in which the affected joint tends to assume the least painful position and may become more or less permanently fixed in it.

Artificial ankylosis (arthrodesis), locking of a joint by surgical operation, is sometimes done in treatment of a severe joint condition.

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bony ankylosis

union of the bones of a joint by proliferation of bone cells, resulting in complete immobility.

extracapsular ankylosis

that caused by rigidity of surrounding parts.

false ankylosis, fibrous ankylosis

reduced joint mobility due to proliferation of fibrous tissue.

inherited multiple ankylosis

calves are affected at birth and cause fetal dystocia. The legs are bent and fixed in flexion, and there is some deformity of the spine. In one breed of cattle there is a combination of ankylosis and cleft palate.

intracapsular ankylosis

that caused by rigidity of structures within the joint.

spontaneous ankylosis

occurs in the intertarsal and tarsometatarsal joints of horses. Called also bone spavin.

spurious ankylosis

extracapsular ankylosis.

stapedial ankylosis

fixation of the footplate of the stapes in otosclerosis, causing a conductive hearing loss.

surgical ankylosis

performed to immobilize a painful joint or to correct excessive mobility, e.g. carpal ankylosis carried out on large birds as a deflighting procedure.

true ankylosis

bony ankylosis.