186 



ANIMAL DENTISTRY. 



opposing one. In the aggravated forms there will also be 

 a considerable excavation of the jaw in the vacant cavity. 

 Owing to the frequency of decay in the fourth superior molar 

 the condition appears chiefly in the region of the fourth in- 

 ferior molar. 



Treatment — Trimming to the level of the arcade with 

 the lever cutter in young animals and extraction in the aged 

 patient. In horses more than fifteen years old the implan- 

 tation is so unstable that the cutting process may loosen the 

 tooth. 



Fig. 132. 

 Typical Case of Elongation of the 4th Inferior Molar (Ostertag). 



OPERATION OF CUTTING ELONGATIONS. 



Restraint — Standing position with the dental halter and 

 without the use of the speculum. The speculum will pre- 

 vent placing the cutter evenly over the crown of the tooth. 



Equipment — Dental halter, open molar cutter, floats and 

 file. 



Modus Operandi — For the left side guide the head of the 

 cutter to the tooth with the left hand, as the other hand 

 supports them by the handles. Place the left handle 



