osteoplastic

I shall expose the third left frontal convolution of the brain through the fronto-parietal bone, and, in making the osteoplastic flap, I intend to leave a wide working margin above the size of the opening which may actually be necessary in order to reach the growth.

In other cases, however, the changes in the interior of the bone are accompanied by well-marked lesions on its gliding or postero-inferior surface, and by evidences of an osteoplastic periostitis along its edges.

The periostitis thus set up invariably takes the osteoplastic form, and as a result of this we have growths of new bone in the near neighbourhood of the joint.

It is in the later stages of the disease—that is, when the pus has been evacuated and reparative changes commenced—that this osteoplastic periostitis is most marked, and it plays a large part in bringing about the condition of anchylosis, which we shall afterwards describe.

Along its edges large osteophytic outgrowths speak of the effects of an osteoplastic periostitis.