The Dental cosmos . y when once in positionThis is accomplished by fitting an iridiumized platinum wire loosely into thehole in the root-canal, and bending and cutting it of sufficient length tocome exactly in contact with the gold plate when in proper position. Nextthoroughly dry the tooth, insert the wire, and put some sticking wax, thatwill break rather than move its position, on the gold plate, warm it overa lamp, and put it into place. It may be necessary also to place a hot flatburnisher on the outside of the gold plate to heat the wax so it will adhereto the pin. Then draw the gold plat
The Dental cosmos . y when once in positionThis is accomplished by fitting an iridiumized platinum wire loosely into thehole in the root-canal, and bending and cutting it of sufficient length tocome exactly in contact with the gold plate when in proper position. Nextthoroughly dry the tooth, insert the wire, and put some sticking wax, thatwill break rather than move its position, on the gold plate, warm it overa lamp, and put it into place. It may be necessary also to place a hot flatburnisher on the outside of the gold plate to heat the wax so it will adhereto the pin. Then draw the gold plate out carefully to prevent detaching itfrom the pin, and invest in a drop of plaster to hold the pin in position whilesoldering. It is not necessary to use sand, and the smaller the quantity ofplaster the sooner the soldering is dene. For this I use 20-carat gold, andflow sufficient on the gold plate to make it quite rigid. It may be furtherstrengthened by soldering a small platinum pin to the middle of the bar that. serves for the cutting-edge and to the pin that goes into the root. Whenthere is any retention in the tooth at the cutting-edge, this also gives anadditional anchorage, as the cement has a projection to which it holds. Thislittle pin also prevents the bar, which is very soft, from opening when fillingin against it. We now have the piece ready to put in place as in Fig. the tooth and the piece, and put into position with Poulson prefer this cement for such work on account of its great hardness andtenacity. When the cement has hardened, I excavate it from between thetooth and gold, from the lingual surface, beginning at the anterior cervicalwall, and continue over the cutting-edge to sufficient depth to secure goldor amalgam. I generally use the latter, as the quantity is too small to beseen or to discolor the tooth. I find that submarine amalgam is best at thecervical wall, and contour on the cutting-edge. When sufficiently hard Lexcavate the labial s
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentist, bookyear1890
