. The science and practice of dental surgery. ny marked degreeof proclination or other deformity is ever pro-duced by the erupting canines when the incisorteeth are firmly implanted in a normal manner;it is probable that the typical V-shaped arch isnever produced in this way. In the case of themandible the only result likely to happen is anexaggeration of any slight degree of imbricationor fanning of the incisors already present. Treatment.—Treatment, in the case of slightforward movement and slight deformity, shouldconsist in backward movement of the molarsand correction of any misplaced teet
. The science and practice of dental surgery. ny marked degreeof proclination or other deformity is ever pro-duced by the erupting canines when the incisorteeth are firmly implanted in a normal manner;it is probable that the typical V-shaped arch isnever produced in this way. In the case of themandible the only result likely to happen is anexaggeration of any slight degree of imbricationor fanning of the incisors already present. Treatment.—Treatment, in the case of slightforward movement and slight deformity, shouldconsist in backward movement of the molarsand correction of any misplaced teeth. It isnot, however, wise to adopt this method wherethe movement has been at all considerable, orafter the eruption of the second permanentmolars. Extraction is then the best remedy,for expansion is inadmissible in an arch ofnormal character and size, and extensive back-ward movement does not offer advantagescommensurate with the extent and difficultiesof the Cryer (60) considers thatsuccessful backward movement of a first lower. Fig [ormal occlusion of upper molars and preinolars and buc-cal displacement of canines, due to forward movement of molars.(J. E. Spiller.) ntolar half its width after eruption of the secondmolars is impossible. The selection of theparticular tooth, or teeth, to be extracteddepends upon varying circumstances, such asthe character of the deformity, and condition 95 as to caries; and it is impossible to lay downdefinite rules. It may be said that the molarsshould be preserved unless carious to an extentthat renders permanent filling impossible;that for deformities produced by the processinider discussion extraction of the laterals isscarcely ever justifiable; and that an aberrantpremolar and the corresponding tooth in theopposite jaw, or a pair of premolars (rightand left) to make room for canmes, are theteeth usually to be chosen. It is generallybest to extract symmetrically on both sides ofthe mouth; otherw ise a deviation of thecentral in
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
