The Dental cosmos . or in a stove, and heat it red hot; put in gold scraps, which havepreviously been melted into a button so that they will not take up somuch room. With the blow-pipe thoroughly fuse the button, andwhile it is melted press together the rings (which were held aboutone inch apart). Let it cool a minute or so by turning off the gas,then open, and if you have not put in gold enough, put in some moreand heat again. But it is better to have gold enough the first time, Fig. for so much heating endangers the band. There should be a littlesurplus gold, so that it will mold under p
The Dental cosmos . or in a stove, and heat it red hot; put in gold scraps, which havepreviously been melted into a button so that they will not take up somuch room. With the blow-pipe thoroughly fuse the button, andwhile it is melted press together the rings (which were held aboutone inch apart). Let it cool a minute or so by turning off the gas,then open, and if you have not put in gold enough, put in some moreand heat again. But it is better to have gold enough the first time, Fig. for so much heating endangers the band. There should be a littlesurplus gold, so that it will mold under pressure. Fig. 5 is a sectionthrough the full-sized rings to show how the investment in the largering has been cut away so that only the cusp part of the matrix shallshut closely and force out the surplus. Cool, grind ofT the points,smooth the surface, polish, and set in the usual way (Fig. 6). REMOVABLE CROWN- AND BRIDGE-WORK. 635 Now you have a crown that will last a lifetime, fill the spaceperfectly, and articulate exactly. But if you should get one on toolong you can grind it with perfect safety, as the cusps are thick andheavy. Fig. 5. Fig. 6.
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectdentistry
