The Dental cosmos . respective burs until the proper outline isobtained—namely, upon sound tooth-structure. The bur must be held posi-tively at right angles to the floor of thecavity. The last bur used gives the sizeof the inlay needed, via the gage. Thecavity is undercut and the inlay ce-mented. Dress down the excess of inlayand cement, at the next sitting. The non-use of this method is undoubt-vol. xlix.—3 an assortment of any value. Coupledto this is the fact that the manufac-turers have not aided us by stocking aproper supply (perhaps for the same rea-son), and one must necessarily send to
The Dental cosmos . respective burs until the proper outline isobtained—namely, upon sound tooth-structure. The bur must be held posi-tively at right angles to the floor of thecavity. The last bur used gives the sizeof the inlay needed, via the gage. Thecavity is undercut and the inlay ce-mented. Dress down the excess of inlayand cement, at the next sitting. The non-use of this method is undoubt-vol. xlix.—3 an assortment of any value. Coupledto this is the fact that the manufac-turers have not aided us by stocking aproper supply (perhaps for the same rea-son), and one must necessarily send toEngland for replenishment. Hows method. The cavity prepara-tion is the same as in the previousmethod. The inlay, however, is groundfrom a porcelain tooth, of the proper 34 THE DENTAL COSMOS. shade, to approximate the circular cavity.(Fig. 5.) This piece is shellacked to Fig. a metal mandrel fitted in the handpieceand allowed to run over a carbo file untilquite round (Figs. 6 and 7), when it is is a more expeditious operation, but alsorequiring dexterity and attention. Pierre Robins method. The instru-ment outfit for this method consists ofeleven cone-shaped burs, to be used in thestraight and right-angle handpieces. Ar-ranged in consecutive order endwiseagainst one another, they form a cone—the thickest part of ithe smallest bur cor-responding to the thinnest part of thenext larger one. (Fig. 8.) The curvea-b shows the size of bur No. 1; a-b,bur No. 2; b-c, bur No. 3; b-c, burNo. 4, and so on. Porcelain rods are made to correspondto this cone, being so formed that eachbur corresponds to some one part of eachrod. This is the first introduction of the Fig. 6
Size: 1497px × 1669px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthor, bookcentury1900, bookdecade1900, booksubjectdentistry
