This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 Excerpt: ...between incisors. To the ends of a section of band material of suitable length are soldered tubes D, one horizontally and one perpendicularly, which engage the angle and screw ends of the traction screw. By tightening the nut the size of the band is diminished and force exerted. Figs. 138 and 139 show efficient devices ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 Excerpt: ...between incisors. To the ends of a section of band material of suitable length are soldered tubes D, one horizontally and one perpendicularly, which engage the angle and screw ends of the traction screw. By tightening the nut the size of the band is diminished and force exerted. Figs. 138 and 139 show efficient devices for widening the arch in the region of the bicuspids. Force is exerted by a lever L of suitable length, its ends being secured by engaging in tubes R, soldered at right angles to sections of wire G, which have been soldered to the lingual surfaces of the anchor hands, as in Fig. 138, or in a closed-end tube attached directly to the anchor band, as in the left of Fig. 139, or the tube may be soldered to a side of the nut of the clamp band, as on the right. This form of device is often useful in widening the arches of children to release lateral pressure upon the centrals, to be followed by a delicate vulcanite plate covering the vault of the arch, for retention, as in Fig. 158. A new combination of appliances for effecting double rotation of the central incisors is shown in Fig. 140. It consists of bands having spurs soldered at their mesio-labial angles to engage a tightly drawn and twisted wire ligature. Between the bands is stretched a strip of rubber. By the occasional renewing of the ligature a powerful force is exerted which will turn the teeth readily. Temporary retention is effected by the application of a fresh wire ligature and dispensing with the rubber. Fig. 141 represents a very neat and convenient method of forcing the eruption of a cuspid which had become impacted by the too long retention of the deciduous cuspid. The first upper bicuspid was encircled by a No. 1 band; to its labial surface, parallel with the long axis of the to...
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