Orthodontia Practically Treated; Designed for the Use of Both Practitioner And Student
The book Orthodontia Practically Treated; Designed for the Use of Both Practitioner And Student was written by author Knapp, Miland Austin, B. 1868 Here you can read free online of Orthodontia Practically Treated; Designed for the Use of Both Practitioner And Student book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Orthodontia Practically Treated; Designed for the Use of Both Practitioner And Student a good or bad book?
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232. Fig. 234. 181. Fig. 234 shows a case where the right lateral in- cisor is rotated so that the mesial surface projects labially, causing the tooth to stand forward and at right angles to the 164 ORTHODONTIA. line of the arch. Fig. 235 shows an appliance composed of two jack-screws in position to rotate this lateral. As the central and cuspid were in contact with the lateral there was not sufficient room in the arch for the lateral without moving the central and cuspid apart. The appliance i...llustrated exerts sufficient force to rotate the lateral and also force the adjoin- ing teeth apart to accommodate it. In this case it was neces- sary to expand the posterior jack-screw and contract the anterior one. As soon as the distal surface of the tooth was Fig. 235. in line with the cuspid the posterior jack-screw was not tightened further but was left locked while the tightening of the anterior jack-screw was continued until the tooth was in its proper position. Fig. 236 gives the detail of the construction of the ap- pliance.
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