Prosthetic Dentistry

Prosthetic Dentistry

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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. 1904 edition. Excerpt: ...and closely to the root at its termination under the free margin of the gum, it is necessary to so shape this portion of the root that it will also represent the section of a cone with its base located well under the free margin of the gum, its apex directed incisally or occlusally. 391. Fig. 137 a and b shows the principle involved. It therefore follows that in many cases not only must the enamel be all removed, but a portion of the dentine as well. This is accomplished by the use of several special instruments, the principal ones of which are the Case cleavers and the Prothero root trimmers. 392. Fig. 13R shows the enamel cleavers, which are made moderately heavy and are tempered quite hard so as to readily fracture the enamel when applied with proper force, without losing their edge. They should be used with the palm grasp while the thumb rests upon some of the proximating teeth as a support or rather as a fulcrum. The point is first placed against the enamel surface under the free margin of the gum, force applied and the instrument pulled away in the direction of the long axis of the root. (Fig. 1390.) It is then set close to the point of first application and this step repeated until the enamel around the entire periphery has been subjected to this procedure. This does not remove the enamel to any extent, but it is so fractured as to readily yield when the side blade of the cleaver is applied. 393. The side of the instrument is now used as a hoe. passing it up under the free margin of the gum as far as the enamel extends, b, applying the force as in the first steps and pulling it out with a sort of forward rotary motion. This loosens up md brings away a little at a time the already fractured enamel ring around the periphery. 394. Sometimes...show more

Product details

  • Paperback | 102 pages
  • 189 x 246 x 5mm | 195g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236591259
  • 9781236591258