A practical treatise on mechanical dentistry . irection, as in Case 2, is constructed quite similarly, thedirection of the two forces being reversed. See Fig. 261. Protruding Apparatus.—In constructing an apparatus for forc-ing the roots and adjoining bone of the anterior teeth forward,wide German silver banding material for the teeth should beselected, that is, or - 6. -- of an inch in thickness. This. CORRECTION OF DENTAL IRREGULARITIES. 463 should be fitted to the crowns of the anterior teeth near the mar-gins of the gum, perhaps extending beneath the margins on theproximal sides.
A practical treatise on mechanical dentistry . irection, as in Case 2, is constructed quite similarly, thedirection of the two forces being reversed. See Fig. 261. Protruding Apparatus.—In constructing an apparatus for forc-ing the roots and adjoining bone of the anterior teeth forward,wide German silver banding material for the teeth should beselected, that is, or - 6. -- of an inch in thickness. This. CORRECTION OF DENTAL IRREGULARITIES. 463 should be fitted to the crowns of the anterior teeth near the mar-gins of the gum, perhaps extending beneath the margins on theproximal sides. Then bars of No. 15 B. and S. G. wire, slightlyflattened, should be soldered to each of the bands in an uprightposition, and bent so as to lie along the anterior surface of thecrowns from the apex to where the bars join the band; here theyshould take a direction somewhat parallel to the gum, but freefrom the surface to about y]g of an inch above its margin, at whichpoint they should be flattened or thinned, so as to be more easily Fig. Protruding apparatus in position. bent forward, and firmly clasped around a rigid bar which is madeto extend from anchorage tubes attached to the posterior Fig. 261. The upright bars are now made of slightly heavier material, andmade to rest in front of the power bar, and cut off even with its topedge, when they are thinned and rounded, as shown in the illustration. This bar, which should be very rigid, is drawn without anneal-ing from a No. 9 extra hard German silver wire to No. 15 B. and The ends are threaded in the No. 4 hole of the Martin screw-plate, and the central portion is slightly flattened in the rollers. 464 MECHANICAL DENTISTRY. Then it should be bent so as to rest when in proper position inthe unclasped ends of the upright bars that have been left opento receive it. Before placing it in position, the nuts should bescrewed on to work at the anterior ends of the tubes. This apparatus can be made to exert an exce
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
