Dental cosmos . the occlusion of the lower incitsors prevented from proper contactwith the centrals. The temporary molars and cuspids still remainin the mouth. Until the permanent molars shall have developedand lengthened the bite, these incisor teeth will continue to be held Fig. apart as they often are when the sixth-year molars have been ex-tracted. Seventeen years of age (Fig. 8). This shows the growth andbetter articulation which generally takes place between the twelfthand eighteenth years. It will be noticed that the molars and bicus- CHANGES DURING DEVELOPMENT OF THE HUMAN TEETH. 5
Dental cosmos . the occlusion of the lower incitsors prevented from proper contactwith the centrals. The temporary molars and cuspids still remainin the mouth. Until the permanent molars shall have developedand lengthened the bite, these incisor teeth will continue to be held Fig. apart as they often are when the sixth-year molars have been ex-tracted. Seventeen years of age (Fig. 8). This shows the growth andbetter articulation which generally takes place between the twelfthand eighteenth years. It will be noticed that the molars and bicus- CHANGES DURING DEVELOPMENT OF THE HUMAN TEETH. 585 pids have so elongated, or, in other words, there has been suchlengthening of the bite, that the lower central incisors no longerclose beneath the upper centrals any farther than they ought. Inthis figure the proper relative position of an adults teeth has beenreached, and the overlapping of the incisors equals the depth of thecusp of a bicuspid in the same mouth. Yet the young lady hasprobably not reached her full stature. Fig. 9 represents a mouth containing the whole thirty-two teeth;the same conditions as in the preceding case exist here, but it willbe noticed that the lower wisdom-teeth occupy a position still higheron the curve of the lower jaw, so that the concavity
Size: 2315px × 1080px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthor, bookcentury1800, bookdecade1880, booksubjectdentistry
