TEETH 



199 



ENAMEL PULP 



ENAMEL 

 j«^- DENTINE 



—ODONTOBLAST LAYER 

 -- PULP CAVITY 

 f* — ^^ TEMPORARY TOOTH 



^''JAW-BONE 



Fig. 152. — A section of the jaw of a nine-months human embryo, showing the anlage 

 of a canine tooth. The enamel organ of the permanent incisor is seen on the lingual 

 side of the milk-tooth. (Redrawn after Corning.) 



SECOND 

 PERMANENT- 

 MOLAR. 



PERMANENT- 



PERMANENT- 

 CANINE. 



/ « PERMANENT 

 '/ Jj MOLAR. 

 2^=^ PERMANENT 

 INCISORS. 



Fig. 153.— The teeth of a five-year-old child. Portions of the jaws have been 

 removed so as to expose the roots of the milk teeth and the anlagen of the permanent 

 teeth. The latter are stippled in the figure. (Redrawn after Sobotta.) 



