PERMANENT TEETH. 



103 



bicuspids supplant the milk-molars. The permanent 

 molars are added as the jaw grows larger; the hindmost 



FIG. 29. Section through a tooth still imbedded in its socket, i, enamel; 2, den- 

 tine; 3, cement; 4, the gum; 5, the bone of the lower jaw; c, the pulp-cavity. 



ones, often named the wisdom-teeth, do not appear until 

 about the twentieth year of life. 



