Dental cosmos . That the growth of the alveolus is also dependent on that ofthe permanent teeth. From these facts it will be inferred that the removal of per-manent teeth will prevent the natural development of the jaw, thegrowth of the alveolus, and the attainment of the height of thevol. xxxi.—41 581 582 THE DENTAL COSMOS. normal bite. These inferences, I think, will be sustained by thediagrams. Now, as has been said and is generally known, the jaw growsfrom infancy to adult age. It is by no means as large in a childseven years of age as in an adult. To illustrate this fact, I havediagrams h
Dental cosmos . That the growth of the alveolus is also dependent on that ofthe permanent teeth. From these facts it will be inferred that the removal of per-manent teeth will prevent the natural development of the jaw, thegrowth of the alveolus, and the attainment of the height of thevol. xxxi.—41 581 582 THE DENTAL COSMOS. normal bite. These inferences, I think, will be sustained by thediagrams. Now, as has been said and is generally known, the jaw growsfrom infancy to adult age. It is by no means as large in a childseven years of age as in an adult. To illustrate this fact, I havediagrams here from three years old to adult age. They are intendedalso to show the manner of the jaws development and the growthof the alveoli, which takes place posteriorly to the last temporarymolar, so that the three permanent molars on each side of the adultjaw occupy the position that was originally occupied by the ascend-ing ramus of the child. I will now refer you to the diagram of a mouth three years of Fig. age (Fig. 1). The twenty temporary teeth are all in position, ingood occlusion and regular, and all apparently just touching oneanother. The upper incisors lap over the lower. The upper molarsare astride of the buccal cusps of the lower molars. The line ofocclusion from incisors to molars is almost straight. Fig. 2 represents the mouth of a child five years old. The condi-tions are nearly the same as in Fig. 1, excepting that spaces beginto appear between the incisor teeth. This spacing is partly due to Fig. 2.
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Keywords: ., bookauthor, bookcentury1800, bookdecade1880, booksubjectdentistry
