The Dental cosmos . on critical examination witha magnifying glass, to be checked, and the pit would involve a lossof the enamel retaining dentine at that point; and second, the liabilityof fracture by continued wear upon the unprotected corner would beincreased by an anchorage pit. My method of procedure in such a case is to prepare the upper UNION CONVENTION IN ROCHESTER, N. Y. 53 portion of the cavity by cutting a groove in the dentine with a verysmall round bur at the cervical part, and at either end of the groovedrill small shallow pits for anchorages. The thin, sharp corner at thecutting
The Dental cosmos . on critical examination witha magnifying glass, to be checked, and the pit would involve a lossof the enamel retaining dentine at that point; and second, the liabilityof fracture by continued wear upon the unprotected corner would beincreased by an anchorage pit. My method of procedure in such a case is to prepare the upper UNION CONVENTION IN ROCHESTER, N. Y. 53 portion of the cavity by cutting a groove in the dentine with a verysmall round bur at the cervical part, and at either end of the groovedrill small shallow pits for anchorages. The thin, sharp corner at thecutting-edge is then cut carefully away with a file or thin disk, andthe cavity edges made quite smooth so that the front of the tooth willappear as shown in Fig. 2. With a small, sharp inverted cone bur(No. 34) a groove is cut in the worn end of the tooth from the cavityto near the opposite side, where a small anchorage pit is made asillustrated by Fig. 2. The enamel on the labial face may often be Fig. 3. Fig. 4. Fig. thus left protected by a small portion of the dentine, while the palatineface will be cut somewhat away in securing strength of enamel-edgeat that part. The prepared tooth is well shown by Fig. 2. The fill-ing is begun in the upper pits and groove, and built downward solidlyto near the cutting-edge. Another start is made in the anchorage pitat the farther end of the edge groove, which is progressively filleduntil the approximal filling is reached, and the two solidly welded andcompletely contoured (Fig. 3). In any case I should cover the enamelcutting-edge with gold, and then dress off only so much as shouldbe found necessary for occlusion (Fig. 4). If the incisors and cuspids Fig. 6. Fig. 7.
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectdentistry
