Pathologic changes about the tissues of the face resulting in death of bone are most common. It is quite usual for the dentist to remove portions of bone during the management of pyorrhea alveolaris and other suppurative conditions about the teeth. A cardinal symptom suggestive of beginning destruction of bone is swelling that pits on pressure, or what is known as edema. When this is found either on the alveolar process or tibia, a careful study of associated symptoms should be made, since it is on the proper and early management of such cases that the subsequent history depends.
When the existence of a periostitis is fully determined a free incision should be made down to the bone, for just so soon as the colony of bacteria that is causing the trouble is reached and disconcerted, their activity ceases and repair begins. When, however, myriads of