. The Dental cosmos. er a cylindroidshape (see Fig. T) can be given to thesesimple cavities, the better the retentionwill be. The cement must be thin enoughto permit perfect seating of the filling,and sufficiently thick to set in fromtwenty to thirty minutes. When thesecavities extend above the gingival line(see Fig. 8) the filling should bepainted with pink china paint (Fig. 9)to keep the length of the labial surfaceof the tooth in harmony with that of theapproximating teeth (see Fig. 10). MOFFITT. NOTES ON PORCELAIN WORK. 685 BUILDING-Ur INCISAL CORNERS. I have described a method for mak-ing
. The Dental cosmos. er a cylindroidshape (see Fig. T) can be given to thesesimple cavities, the better the retentionwill be. The cement must be thin enoughto permit perfect seating of the filling,and sufficiently thick to set in fromtwenty to thirty minutes. When thesecavities extend above the gingival line(see Fig. 8) the filling should bepainted with pink china paint (Fig. 9)to keep the length of the labial surfaceof the tooth in harmony with that of theapproximating teeth (see Fig. 10). MOFFITT. NOTES ON PORCELAIN WORK. 685 BUILDING-Ur INCISAL CORNERS. I have described a method for mak-ing a porcelain inlay where access forburnishing the matrix cannot be ob-tained, in the Venial Brief for April1913. strike the lower teeth and we grind themdown until they do not touch, as soonas the remaining teeth wear down alittle more or the molars tilt over a littlefarther and allow the porcelain to strikefirst, it is certain that these restorationsbecome dislodged again; but if we cor- Fig. 13. Fig. 14. Fig. Front teeth with the incisal cornersbroken off, or about to break off fromingress of caries, require porcelain fill-ings, for, when excavation can be com-pleted without removing the corner, thecement under the filling will strengthenthat corner, and when the corner is lost, rect the occlusion and prevent the porce-lain edges from undue stress, and if wedestroy the micro-organisms that are inthe tubuli of the teeth, then so shape thefilling that its anchorage by cement ismost augmented, and manipulate ourcement so that its utmost efficiencv is Fig. 16. Fig. 1
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