. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig. 154. Fig. 155. Fig. 154.—Lingual step formin an upper lateral incisor. The gingival wall,instead of being made flat, has been cutto follow the curvature of the gingivalline somewhat, in order to provide a betterseat and anchorage for the filling. Fi<^- 155-—Labial view of the mesio-incisal cavity with lingual do\etail, shown inFig- 54- io8 PREPARATION OP CAVITIES groove is formed. Now, with the chisel, cut away more ofthe Hngual enamel plate, and then with the hoe deepen thegroove
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig. 154. Fig. 155. Fig. 154.—Lingual step formin an upper lateral incisor. The gingival wall,instead of being made flat, has been cutto follow the curvature of the gingivalline somewhat, in order to provide a betterseat and anchorage for the filling. Fi<^- 155-—Labial view of the mesio-incisal cavity with lingual do\etail, shown inFig- 54- io8 PREPARATION OP CAVITIES groove is formed. Now, with the chisel, cut away more ofthe Hngual enamel plate, and then with the hoe deepen thegroove, continuing thus, always cutting at the expense of thelingual side, till the step form is complete and will allow asufficient bulk of filling material for strength (Figs. 152 and153)- (9) Lingual step form. Where the tooth is too thin,labio-lingually, to warrant the incisal step, prepare anauxiliary mortise form on the lingual surface of the toothwith the chisels, hoes and hatchets, as illustrated in and 155. The floor of this step is made flat and the.
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidoperativedentala00mcge
