. The science and practice of dental surgery. JJsveLapment o; /7?axitlxrnU Outline : TtrnpOfaru ^e/iTure at *5yeara,2)one^ Ovtlim : X^evelaptd arch — 9ye*fj .Per. Centra L _ . fyrs. ^^^^^^ lateral _ _ ,^,f^ Fig. 85.—Diagram from casts at five and nine years of age, to show development in normal upperarch. (Varney E. Barnes : Trans. Amer. Soc. of Orthodontists ; Items of Interest.) 55 connected with tlie position of the teeth and withthe occhision, the prominence of the chin is notdependent solely on local growth. It has been shown by Cryer (58) (59) thatmarked differences occur in tl

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. The science and practice of dental surgery. JJsveLapment o; /7?axitlxrnU Outline : TtrnpOfaru ^e/iTure at *5yeara,2)one^ Ovtlim : X^evelaptd arch — 9ye*fj .Per. Centra L _ . fyrs. ^^^^^^ lateral _ _ ,^,f^ Fig. 85.—Diagram from casts at five and nine years of age, to show development in normal upperarch. (Varney E. Barnes : Trans. Amer. Soc. of Orthodontists ; Items of Interest.) 55 connected with tlie position of the teeth and withthe occhision, the prominence of the chin is notdependent solely on local growth. It has been shown by Cryer (58) (59) thatmarked differences occur in tlie growtli and formof the bones of the face with which the maxillais connected, and these variations must havetheir effect on the shape of the maxilla andconsequently on the shape of the arch. Insome cases there is a want of symmetry betweenthe two sides, just as there is in other j^arts ofthe body, and the discrepancy affects the archtogether with the other parts of the face. Gross anomalies in the form of the arch andin occlusion have

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19