. Orthodontia, or malposition of the human teeth; its prevention and remedy . s of the retainer shown in spring Bar and Band for Rotation. Fig. 17. It may also be retained by a rubber plate havinga gold spur to pass between the teeth and rest upon the por-tion of the tooth that has been moved inward. Prof. Angle has improved this appliance by making theband and bar detachable. The band is fitted with a section of German silver tubingsoldered to its labial surface, parallel with the cutting edge of the tooth. Another band, with a hook or catch soldered to its buccal surf^ice, is fitted to a bic
. Orthodontia, or malposition of the human teeth; its prevention and remedy . s of the retainer shown in spring Bar and Band for Rotation. Fig. 17. It may also be retained by a rubber plate havinga gold spur to pass between the teeth and rest upon the por-tion of the tooth that has been moved inward. Prof. Angle has improved this appliance by making theband and bar detachable. The band is fitted with a section of German silver tubingsoldered to its labial surface, parallel with the cutting edge of the tooth. Another band, with a hook or catch soldered to its buccal surf^ice, is fitted to a bicuspid or molar. This latter band also has a piece of tubing, soldered horizontally to its palatine surface, through which is passed a piece of wire intended to rest against the two teeth adjacent to the one banded and thus afford Rotation. (Angle.) greater resistance. After both of these bands are cemented to their respective teeth, a straight piece of piano-wire is inserted in the tube of the tooth to be turned, and bent down and caught in the catch on the other Fig. PRACTICAL TREATMEXT. 16H Fig. 109. tooth, as shown in Fig. 108. The advantage of this modifi-cation is, that a weaker or stronger wire can be substitutedat will, and the power be thus readily controlled. Whenthe tooth is in proper line, the wire is removed and replacedby a shorter one resting upon an adjoining tooth. This actsas a retainer by keeping the tooth in position until it hasgrown firm. The retaining wire is secured by means of apin, inserted in a hole drilled 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 turn
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidorthodontiaormal00guil
