A practical treatise on artificial crown- and bridge-work . onstant source of irritation, and defies all efforts of themembranes to perfectly inclose or encyst it. In such cases amputation of the portion of the root which is denuded of pericementum is the best course to pursue. An opening is made in the soft tissues above the affected part with the lancet or trephine, and gradually enlarged with a tent of lint or cotton until the diseased territory // is fully exposed (Fig. 9), when the devitalized end of the root and any necrosed bone in the territory are removed with a fissure-drill, and the
A practical treatise on artificial crown- and bridge-work . onstant source of irritation, and defies all efforts of themembranes to perfectly inclose or encyst it. In such cases amputation of the portion of the root which is denuded of pericementum is the best course to pursue. An opening is made in the soft tissues above the affected part with the lancet or trephine, and gradually enlarged with a tent of lint or cotton until the diseased territory // is fully exposed (Fig. 9), when the devitalized end of the root and any necrosed bone in the territory are removed with a fissure-drill, and the end of the root smoothed. The root-canal is then closed with gutta-percha passed through from within, the surplus being trimmed off on the outside. Cocaine can be used in this operation. The orifice of the cavity in the gum should be kept open until the cavity is filled l)y granulation. When the healing process is completed, crown-work can be proceeded with. The amputation of roots requires skill and experience, andhad better be confined to the CHAPTER V SHAPING TEETH AND KOOTS FOR CliOWN-AVORK. The princi[>les governing the process of shaping ii naturalcrown or root for any style of artificial crown witli a collarattachment re(juire that the cervical portion of the natural crownand root shall be given a form that has longitudinally-parallelsides gauged to the line of the peripliery of that part, aud thatany of the coronal section i)resent below it shall be reduced atleast suliiciently in size to come within this line. Such a formis necessary to admit of a perfect adaptation of the collar. The coronal section of a natural crown to be prepared isusually first ground on the occluding surface with as laige acorundum-wheel as the case will eonveniently admit (Fig. 10). Fia. 10.
Size: 1018px × 2454px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectcrowns, bookyear1889
