The tightening of loose teeth: some technical innovations . is in the mouth. In the caseof timid patients, the point of the pin should becovered with a pellet of wax or gutta-percha. When drilling, the left hand holds the loose tooth,while the right keeps the lancet burr parallel to thefloor of the oral cavity. The burr is to be frequentlytaken out and lubricated. Very sharp burrs are a cardinal necessity. In the case of the second incisor the first pin servesas a guide, the one half standing out from the mouthfor the hand-piece, the other half, being in the oralcavity, for the lancet burr. Li
The tightening of loose teeth: some technical innovations . is in the mouth. In the caseof timid patients, the point of the pin should becovered with a pellet of wax or gutta-percha. When drilling, the left hand holds the loose tooth,while the right keeps the lancet burr parallel to thefloor of the oral cavity. The burr is to be frequentlytaken out and lubricated. Very sharp burrs are a cardinal necessity. In the case of the second incisor the first pin servesas a guide, the one half standing out from the mouthfor the hand-piece, the other half, being in the oralcavity, for the lancet burr. Like the first, the secondis also fitted with a pin after it has been drilled. 12 THE TIGHTENING OF LOOSE TEETH Thus there are at last six pins, parallel, directedinto the mouth (Fig. 5). In case a canine is much rotated, so that paralleldrilling would weaken it unduly, it should be drilledacross independently of its direction, and must beretained separately. The first step in applying the retainer: Theparallel drilling being difficult, the impression made. Fig. practice the pins must be turned round. at the first sitting should be used as a model forparallel drilling (Fig. G). In case drilling is painful—in spite of the above-mentioned remedies—injection or ethyl chloride maybe resorted to. After having removed the pins, I take an impressionwith Perfection composition, on which the holes aremarked (Fig. 7). MECHANICAL FIXATION 13 With a pencil line I mark on the model the extentof the retaining appliance, the lower part of whichextends to about the foramen c?ecum of the lateral
Size: 1697px × 1473px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
