10 



Teeth. 



335. The Right Permanent Teeth, Denies per manentes. 



Eacli jaw lias sixteen permanent teeth, namely: 



Four incisor teeth, Denies incisivi, with chisel-shaped crowns 

 and single conical roots. 



Two canine teeth. Denies angulares s. canini, with conical crowns, 

 tapering to a blunted point or cusp (on the inner side of these are two 

 facets) and single conical roots. 



Four bicuspid teeth, Denies bnccales ; the crown is compressed 

 antero-posteriorly, and surmounted by two pointed tubercles, an external 

 and an internal ; the roots bifid or single, compressed, and deeply grooved. 



Six molar teeth, Denies molar cs ; the grinding surfaces surmoun- 

 ted by four or five tubercles; In the upper jaw the root consists of three 

 fangs, of which -two are external, and one internal ; in the lower jaw 

 it has two fangs, one placed in front, the other behind, each of which 

 is grooved. The last molar or wisdom tooth, Dens serotimis, Dens 

 saplentlae (so called on account of its late appearance, usually between 

 20 and 25 years), has a smaller crown, shorter and more converging 

 roots, which may also blend and form a single fang. 



The periods of eruption of the temporary and permanent teeth 

 are evident from Fig. 338 a and 338 b. 



