. Orthodontia, or malposition of the human teeth; its prevention and remedy . lled through both tube and simple device devised by Dr. Jackson * for rota-ting a single incisor isillustrated in Fig. consists of a band orcollar, made to encirclethe one incisor, to whichare attached upon thelabial and palatal sur-faces two lugs to receivea U-shaped wire. Onearm of this wire springlies upon the labial side Rotating Device. (Jacksou.) of the tCCth and prO- duces pressure upon the mesio-labial corner of the turnedtooth while the other extends along the palatal surface andpresses u
. Orthodontia, or malposition of the human teeth; its prevention and remedy . lled through both tube and simple device devised by Dr. Jackson * for rota-ting a single incisor isillustrated in Fig. consists of a band orcollar, made to encirclethe one incisor, to whichare attached upon thelabial and palatal sur-faces two lugs to receivea U-shaped wire. Onearm of this wire springlies upon the labial side Rotating Device. (Jacksou.) of the tCCth and prO- duces pressure upon the mesio-labial corner of the turnedtooth while the other extends along the palatal surface andpresses upon the disto-palatal angle. Pressure in oppositedirections is thus accomplished, while the balancing of thetwo forces prevents the anchor tooth from turning. Theappliance is too small to in any way interfere with speech orocclusion. DOUBLE TORSION. Where two adjoining teeth, as the superior centrals, areto be rotated in opposite directions, a single appliance willoften accomplish both movements at the same time. Theappliance devised by the author for this purpose is shown. Denial Cosmos, Vol. XXXIII., p. 1076. 164 ORTHODONTIA. ill Fig. 110, and the details of construction in Fig. 111. It is a modification of the appliance for single rotation shown on p. 159. To adapt it for duty in turning two teeth, instead F> 110 ^^ ^^^ single strip of gold passing between the teeth, two strips are bent in the form of b and c. These are made long enough The Authors Device to be bent slightlv over the labial surfaces of for Double Rotation. , i i the teeth to be turned, extend along the Fig. 111. mesial surface to the palatine, and then ~\ r along this latter almost to the distal angle. ^ Is^ After being properly shaped according to k^...>ffys^,^ the model, they are clamped together and\i/ soldered along their contiguous surfaces. This part is then placed in position on themodel, and the long arms bent to conform to the inner sur-face of the bar a, after which it is removed, soldered to
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidorthodontiaormal00guil
