A practical treatise on artificial crown- and bridge-work / By George Evans. With 500 illustrations.

  • Evans, George, 1844-1942.
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on artificial crown- and bridge-work / By George Evans. With 500 illustrations. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    PULPLESS TEETH,—THEIR TREATMENT AND DISINFECTION. Pig. 4. The treatment of pulpless teeth or roots consists in as thorough a performance as possible of the following operations : 1st. Removal of the contents of the canals. 2d. Disinfection of the root-canals and the dentine, and the establishment of permanent aseptic conditions by mummification of the contents of the tubuli. 3d. Closure of the apical foramen. A knowledge of the usual positions of the root-canals in the different teeth is essential for a generally successful performance of these operations, which are greatly facilitated, in crown-work, by the ease with which direct access to the root-canals is obtained. (See Plate IV.)^ An opening is first made into the center of the pulp-chaml)er in a line with the root-canals sufficient to give free and direct access to them, and any remaining portion of the pulp removed with broaches. The canals are then, guided by frequent explorations with a fine probe, carefully enlarged with Gates-Glidden drills (Fig. 4). At least three sizes—large, medium, and small—of drills each for the right-angle and the direct hand-piece are required.* Very little, if any, pressure should be put upon them when in motion, as they will move forward of themselves. Under pressure a false passage 1 Plate IV.—Figs. 1 and 2 represent the superior and inferior teeth in trans- verse section through the base of the pulp-chamber in the crown, showing the entrance to the root-canals. Figs. 3 and 4 represent the superior and inferior teeth in transverse section through the root-canals as they diverge from the pulp-chamber. aa, bb, cc, dd, Jt\ dd, and ee, Figs. 3 and 4, show the relative shapes, whether circular, oval, or flattened, of the root-canals in the teeth they severally repre- sent.