ANIMAL DENTISTRY. 



225 



extent. The diagnosis is confirmed by an examination of the 

 dental arcade. When the tract is direct a small probe may 

 be passed from the external opening to the mouth, but ordin- 



FlG. I50A. 



Inferior Molar Responsible for a Fistula of the Jaw in a 7- Year-Old Horse. 



arily it pursues a tortuous course through the bone and 

 comes to the surface at a point more or less remote from the 

 affected tooth. 



Treatment— The treatment of the dental fistula should 



