. The Dental cosmos . 3 Approximo-occlusal cavity. Wax form made from a stick of pattern wax. 1. First step incarving the wax form. 2. Wax form completed, ready for the cavity. 3. The finishedwax pattern. as they seem to be the most dreaded of procedures looking toward ultimate sim-all, both from the viewpoint of perfect plicity in pattern manipulation and per-pattern-making and successful casting— iection in casting results. THE DENTAL COSMOS. The cavity in Fig. 3 differs from theone in Fig. 2 only in that it extends muchbeneath the free margin of the gum tis-sue; it is this cervical extensio
. The Dental cosmos . 3 Approximo-occlusal cavity. Wax form made from a stick of pattern wax. 1. First step incarving the wax form. 2. Wax form completed, ready for the cavity. 3. The finishedwax pattern. as they seem to be the most dreaded of procedures looking toward ultimate sim-all, both from the viewpoint of perfect plicity in pattern manipulation and per-pattern-making and successful casting— iection in casting results. THE DENTAL COSMOS. The cavity in Fig. 3 differs from theone in Fig. 2 only in that it extends muchbeneath the free margin of the gum tis-sue; it is this cervical extension thatplaces it in the complicated class, andmakes pattern adaptation by ordinarymethods difficult, the difficulty consistingin forcing the wax into contact with thecervical margin of the cavity. Ordinarily,the pattern for this cavity (Fig. 3) wouldbe made in precisely the same manner asthe pattern for the cavity in Fig. 2, previ-ously described. But if there be uncer-tainty as to the wax reaching its marginal Approximo-occlusal cavity, showing steps in thefrom cavity. Note that the wax lias not2, Wax tray coated with liquid wax readyhow it would appear if it were removed froness and detail of cavity margins, especiallycoating converted into a finished wax patter and immediate surrounding tooth tissue—Fig. 3, No. 1, which in effect is usedas a tray to carry the liquid-wax coatingto all parts of the cavity and to force itfirmly against all margins. The tech-nique is as follows: After the wax mass—which shallhenceforth be designated as the wax tray—lias been washed and dried, and anytrimming which may be deemed essentialhas been done, it is attached to the wax-carrier, placed in the wax-softener, andthe temperature is raised to the desireddegree. The wax tray is now removed 3.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentist, bookyear1912
