. The science and practice of dental surgery. B \7 Fig. 260. thus be a passive thrust or tension in the rodnot interfered with, and the question of equalityof force in the two rods depends upon thedegree of resistance of the two teeth. If inthe figure the force applied at A be greaterthan the force applied at B, then the directionof the force of reaction, causing extrusion ofthe anchorage, will be obliquely backwards, thedeflection being possibly beneficial. If, onthe other hand, the force at B is greater, thenthe force producmg extrusion of the anchorage Fig. 201. and direct, but be conveyed
. The science and practice of dental surgery. B \7 Fig. 260. thus be a passive thrust or tension in the rodnot interfered with, and the question of equalityof force in the two rods depends upon thedegree of resistance of the two teeth. If inthe figure the force applied at A be greaterthan the force applied at B, then the directionof the force of reaction, causing extrusion ofthe anchorage, will be obliquely backwards, thedeflection being possibly beneficial. If, onthe other hand, the force at B is greater, thenthe force producmg extrusion of the anchorage Fig. 201. and direct, but be conveyed by means of athird tooth, which remains more or less station-arv under the influence of two opposmg forces(see Fig. 261). In this case the forward puU on the inolarproduced by the backward force applied tothe canine is counteracted by the thrust onthe central, but a certain tendency towardsrotation of the molar exists. This, however,is prevented to some extetit, if themolar tubes are made fairly long,by the fact that both canine andcentral w
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
