The etiology of osseous deformities of the head, face, jaws and teeth . nthe two turbinated bones on that side, and at the thinnestpart of the vomer. When the turbinated bones are unde-veloped upon one side and excessively developed upon theother, the force of air causes the vomer to bend toward the 262 i<:tiology of osseous deformities of smaller turbinated bone, thus lengthening it, so that the airwill enter and leave uniformly upon both sides, as illustratedin Figs. TO and 71. If the turbinated bone is large upon oneside, the force of air will cause the unossified vomer todevelop, and if
The etiology of osseous deformities of the head, face, jaws and teeth . nthe two turbinated bones on that side, and at the thinnestpart of the vomer. When the turbinated bones are unde-veloped upon one side and excessively developed upon theother, the force of air causes the vomer to bend toward the 262 i<:tiology of osseous deformities of smaller turbinated bone, thus lengthening it, so that the airwill enter and leave uniformly upon both sides, as illustratedin Figs. TO and 71. If the turbinated bone is large upon oneside, the force of air will cause the unossified vomer todevelop, and if the cavity of the nose is large, the whole vol-ume of air will eventually strike the vomer upon one side,causing it to bend right or left until the air is uniformly dis-tributed or it comes in contact with the turbinated bones uponthe opposite side. In Figs. 74 and 76, the turbinated bones,developing nearly uniformly upon both sides and filling thenasal cavity, give no opportunity for the septum to deflect tothe right or left. The spaces, therefore, are uniform upon. Fig. 75. both sides. It is also safe to say that when these bones arecovered with mucous membrane that the nose was com-pletely filled, and that these persons were with unstable development of the superiormaxilla and bones of the nose, we must necessarily baveunstable development of the mucous membrane, resulting ina thickening of the membrane and adenoid growths. Theseconditions are almost always to be found in connection withstigmata of degeneracy. We can now see why, in idiocy,imbecility, etc., patients possessing (apparently) high vaults,are mouth-breathers. There is an arrest of development ofthe bones of the face, jaw and nose. The patient cannotbreathe through the nose; the mouth being open the teethand alveolar process develop down for want of antagonism; THE HEAD, FACE, JAWS AND TEETH 263 and the contracted vault, which looks high because of thearrest of development, results. It
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjecthead, bookyear1894
