ANIMAL DENTISTRY. 



205 



result is the formation and growth of more than one tooth 

 at a given point. Some such teeth may never erupt, but 

 remain imbedded in the jaw along the arcade. 



An additional seventh molar frequently occurs behind the 

 sixth in either arcade. This incident is the result of the 



Fig. 144. 

 Supernumerary Incisors of a 9-Year-Old Horse. 



backward extension of the common enamel germ from pre- 

 cocity of the sixth molar. 



Symptoms — The abnormality is observed chiefly in the 

 incisor arcades which may contain an entire double row of 

 teeth. In most instances one or two additional incisors are 



Fig. 145. 

 Supernumerary Molars. 



observed projecting in an irregular fashion to the table level 

 of the arcade. The lateral incisors are most frequently the 

 seat of the abnormality. 



In the molar arcades they may remain hidden through 



