The etiology of osseous deformities of the head, face, jaws and teeth . but higher than the average, being three-fourths of aninch in height. All the teeth have erupted. The anteriorteeth have a tendency to contraction, due to the fact that allthe teeth tend to push forward; the central incisors do notprotrude, as in Case I, because the lateral incisors overlapthem. The right side of the arch tends to assume the saddle-shaped deformity, due to the position of the bicuspids, caused 362 ETIOLOGY OF OSSEOUS DEFORMITIES OF by too lono retention of the temporary teeth. It will beobserved that the t
The etiology of osseous deformities of the head, face, jaws and teeth . but higher than the average, being three-fourths of aninch in height. All the teeth have erupted. The anteriorteeth have a tendency to contraction, due to the fact that allthe teeth tend to push forward; the central incisors do notprotrude, as in Case I, because the lateral incisors overlapthem. The right side of the arch tends to assume the saddle-shaped deformity, due to the position of the bicuspids, caused 362 ETIOLOGY OF OSSEOUS DEFORMITIES OF by too lono retention of the temporary teeth. It will beobserved that the two sides are markedly asymmetrical. Thiscut nicely illustrates the point previously mentioned: that ifcontraction of the jaw were due to contraction of muscles inmouth-breathing, both sides would be alike. Case III, Fig. 113.—Miss Florence T., aged thirteen years;nationality, American. Height of vault, .46 of an inch. Hadscarlet fever at five years of age. Commenced to breathethrough mouth at the age of eight. Arrest of developmentof the bones of the face and Fig 112. This is a well-marked illustration of defective develop-ment of the superior maxilla, and also of arrest of develop-ment of the bones of the face and nose. As in Case I, thesecond molars have not yet made their appearance. Thecentral incisors overlap, but do not protrude. The right sideof the arch tends to assume the saddle-shape deformity, dueto the position of the bicuspids. The cuspid has not fullyerupted on this side, and is still more tardy in its appearanceon the left. As is true of Case II, the two sides are asym-metrical, and the height of the vault is quite a little less thanthe average. When the second and third molars appear, anunusual protrusion of the anterior teeth must necessarily THE HEAD, FACE, JAWS AND TEETH 363 result in order to give safficient room for the molars. If thisis allowed to progress without mechanical interference, amarked V-shaped deformity will result. Case IY, Fig. 114.
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjecthead, bookyear1894
