58 



ANIMAL DENTISTRY. 



EVOLUTION OF THE PERMANENT TEETH. 



The development of the permanent teeth of animals be- 

 gins during the foetal life. During this period they are rep- 

 resented only by a stalk or neck extending from the enamel 

 germ of their temporary analogues, located first on the side 



Fig. 41. 

 Molar Denture at Birth. 



A. Inferior 4th molar. 



B. Superior 4th molar. 



and afterwards at the root. At the time of birth the germ of 

 the central incisors and the first, second and third molars 

 are already prominently formed at the root of the temporary 

 teeth, and the fourth molar — the first permanent tooth to 

 develop — consists of a rounded hypertrophy of the common 

 enamel germ located just posterior to the third temporary 

 molar. (Fig. 41 A. B.) The temporary molars occupy the 



