In Bony ankylosis, there is -

Ankylosis Ankylosis is the fusion of bones in a joint leading to stiffness of the joint. Ankylosis may be : - 1) Fibrous ankylosis: - Two articular surfaces are fused by fibrous tissue. The feature are : - Some movement of joint is possible (though just a jog of movement). Movements may be painless or painful. Most common cause is tubercular arthritis. 2) Bony ankylosis : - There is a bony union between two articular surfaces. The features are : - No movements possible. a Joint is painless A most common cause is acute suppurative arthritis (septic arthritis). Sometimes, stiffness may also occur due to extra-articular etiology such as in Bum contracture, myositis ossificans etc. It is called False ankylosis.