The etiology of osseous deformities of the head, face, jaws and teeth . xamination: UPPER .JAW. Total number examined, Total number normal, Total number abnormal, right side. Total number abnormal, left side. 298 137 73 88 Fig. 93 illustrates the inferior maxilla after the teeth havebeen extracted and absorption of the alveolar process hastaken place. By drawing a line through the center of thelow^er jaw at the median line, a wider space may be seen toexist between the line and the left side than on the other side. THE HEAD, FACE, JAWS AND TEETH 311 LOWER JAW. Total number examined, - - - 154
The etiology of osseous deformities of the head, face, jaws and teeth . xamination: UPPER .JAW. Total number examined, Total number normal, Total number abnormal, right side. Total number abnormal, left side. 298 137 73 88 Fig. 93 illustrates the inferior maxilla after the teeth havebeen extracted and absorption of the alveolar process hastaken place. By drawing a line through the center of thelow^er jaw at the median line, a wider space may be seen toexist between the line and the left side than on the other side. THE HEAD, FACE, JAWS AND TEETH 311 LOWER JAW. Total number examined, - - - 154 Total number normal, - - - - 64 Total number abnormal, right side, - 12 Total number abnormal, left side, - 88 In the study of irregularities of the teeth during the past eight or ten years, I have observed that, although no two cases of irregularities of the teeth are exactly alike, there is a general similarity of shape and outline of alveolar process and jaw, owing to similar environments during eruption of the teeth. Upon the hypothesis that the two halves of the. Fig. 93. superior maxilla are developed in proportion to the excess offood masticated on one side or the other, depending uponright and lef t-handedness of the individual, we suppose thatthe case illustrated is that of a left-handed person, as the leftside of the jaw is larger. But it appears that this side is nor-mal in size and the right is deficent in development. Byexamining carefully the contour of patients teeth, we shallobserve that but few arches are uniforrd. While one sidemay be normal the other will be depressed. Fig. 94 showssuch a deformity. This cut is taken from a model of anextreme case of irregularly-shaped jaw. It represents a per- 312 ETIOLOGY OF OSSEOUS DEFORMITIES OF feet semi-V-shaped arch. (I find in my eollection of modelsthirtj-eight of this variety of deformity, tweuty-four ofwhich are on the right side and fourteen on the left.) Mostof these irregularities are not quite as depressed at t
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjecthead, bookyear1894
