VETERINARY DENTAL SURGERT. 171 



primary fracture, but necrosis of the superficial layer 

 of bony tissue, arising from continued and severe 

 pressure producing periostitis, gangrene of the peri- 

 osteum, the death of the bone from the pressure and 

 non-supply of blood to that part of it is covered by the 

 gangrenous periosteum. In other cases a bony 

 tumor forms here as a result of periostitis, and of 

 increased thickness of the superficial layer of bone 

 (hyperostosis). 



TREATMENT. 



In the first and second forms of injury, it is 

 necessary to remove the fragments of bone, 

 whether they are necrosed or not. It is a waste 

 of time to allow them to be removed by ex- 

 foliation. The method which I recommend is to 

 slit up the skin, and carefully scrape the diseased 

 surface. If this be done the cure may be effected in 

 a very short time. If the necrosis is very superficial 

 one or two applications of dilute hydrochloric acid 

 will effectually remove it, and render unnecessary 

 the performance of an operation. Common-sense 

 will convince the reader, that the cause, namely the 

 severe curb, must not again be applied. 



In the third form of injury, namely, the hyper- 

 ostosis, all the treatment necessary is the remo- 

 val of the cause and the application of soothing 

 remedies, succeeded by frictions with iodine oint- 

 ment. 



