IE MOUTH 



not quite correspond to each other when the mouth is closed: thus the upper 

 canine tooth rests partly on the lower canine and partly on the first premolar, 

 and the cusps of the upper molar teeth lie behind the corresponding cusps of the 

 lower molar teeth. The two series, however, end at nearly the same point behind; 

 this is mainly because the molars in the upper arch are the smaller. 



FIG. 999. The complete temporary dentition (about three years) , showing the relation of the developing permanent 



teeth. (Noyes.) 



FIG. 1000. The complete temporary dentition and the first permanent molar. Note the relation of the bicuspids to 

 the temporary molars. (In the seventh year.) (Noyes.) 



The Permanent Teeth (denies permanenies) (Figs. 1002, 1003). The Incisors (denies 

 incisin; incisive or cutting teeth] are so named from their presenting a sharp cutting 

 edge, adapted for biting the food. They are eight in number, and form the four 

 front teeth in each dental arch. 



iront tei 



