176 THE DENTISTRY OF THE TEETH. 



wound, notwithstanding the trephining had been per- 

 formed a year before I saw the animal. 



" The defluction had an offensive smell, and the sub- 

 maxillary gland was enlarged, causing suspicion of 

 glanders. The opening had been made a little too 

 high, so that the central instead of the superior part 

 of the sinus was perforated. I found that the whole 

 mischief was caused by a diseased tooth. With the 

 assistance of a smith I removed the tooth, which was 

 split up its middle and considerably decayed. It was 

 more than two inches long, and was bent forward to- 

 ward the cheek. The odor was most offensive. I then 

 opened the frontal and maxillary sinuses, both of 

 which were filled with fetid pus. The wounds were 

 first treated with a weak solution of chloride of lime, 

 and subsequently with an ordinary astringent lotion. 

 In addition to the local treatment, I administered the 

 diniodide of copper. 



"After a considerable time the wounds were allowed 

 to heal, and the mare appeared much better. But very 

 shortly the discharge began to flow again worse than 

 ever, and the smell was almost intolerable. Deter- 

 mined, if possible, to make a cure of the case, I cut 

 into the sinus again with the skull-saw, taking out a 

 triangular piece of bone about two inches long by one 

 inch and a half broad. At the upper part of the 

 cavity I found some masticated food in a state of de- 

 composition. It had passed through the alveolus into 

 the sinus. Fractured bones were removed, and the 

 opening being extended through into the nostril, a 

 small instrument could be passed down it into the 

 mouth. A weak nitric acid lotion was used to induce 

 fresh inflammatory action, and, if possible, to fill up, 

 by an effusion of lymph, the passage through which 



