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A MANUAL OF DENTAL ANATOMY. 



The first permanent molar germ, however, is developed 

 about the sixteenth week by a similar budding out of epi- 

 thelium, from that same primary epithelial lamina, whence 

 the temporary enamel germs originated : whilst the second 

 permanent molar originates from the neck of the enamel 

 organ of the first molar after a long interval, i.e., about the 

 third month after birth. 



The enamel germ of the wisdom tooth is similarly derived 

 from the neck of that of the second permanent molar, again 

 after a long interval ; (about the third year. Magitot). 



The accompanying figure represents the enamel germ 



FIG. 67 ('). 



for a permanent tooth budding off from the neck of the 

 enamel organ of the temporary tooth. Many differences of 

 detail, such as the point at which they arise, the depth to 



( a ) From the upper jaw of a kitten about the time of birth, a. Oral 

 epithelium, b. Bone of jaw. c. Neck of enamel organ, d. Dentine 

 papilla, e. Enamel cells. /. Stellate reticulum. h. Tooth germ of the 

 permanent tooth, the enamel organ of which is derived from the neck of 

 that of its predecessor. 



