The Dental cosmos . inished with the edge of an abrasivedisk and a narrow file. Any make ofdetached pin crown best suited in mold and shade is selected and ground to fitthe space. The section to be used is outlined witha corundum disk and broken off. Thevertical plane surface is first ground tosize, then the cervical end is groundto proper length, when both surfaces aretrued on the side of a fine stone on thelathe. (Fig. 2.) Throughout, care mustbe observed not to chip the edge. A cavity is cut in the tooth so as to beshallow at the cervical angle with a flatbase and pointing to the incisal ed
The Dental cosmos . inished with the edge of an abrasivedisk and a narrow file. Any make ofdetached pin crown best suited in mold and shade is selected and ground to fitthe space. The section to be used is outlined witha corundum disk and broken off. Thevertical plane surface is first ground tosize, then the cervical end is groundto proper length, when both surfaces aretrued on the side of a fine stone on thelathe. (Fig. 2.) Throughout, care mustbe observed not to chip the edge. A cavity is cut in the tooth so as to beshallow at the cervical angle with a flatbase and pointing to the incisal edge(Fig. 1), where it becomes deepest, form-ing the only undercut, so that the matrixis drawn by turning out from the cervi- 144 THE DEXTAL COSMOS. cal end or angle. In this cavity isadapted 2/1000 platinum. Should thepuncture be a considerable one. a secondsmaller matrix may be shaped over thepuncture and adapted with wet spunk,which is left in place until matrix is filled flush with any filling Fig. gold packed lightly, and 22-k. solderflowed through. This inlay, returned tothe cavity, is ground flush with the edgeof the latter, taking care not to injure theenamel. The porcelain section is grooved verti-cally with a diamond disk, as a starter Fig. 3.
Size: 1559px × 1602px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthor, bookcentury1900, bookdecade1900, booksubjectdentistry
