A practical treatise on mechanical dentistry . The operation is conducted as describedin the first case of fixed bridge-work down to the construction of 634 MECHANICAL DENTISTRY. the truss, for which in this method square gold wire is used. Hav-ing cut the wire to the proper length, lav it upon a piece of goldplate (about No. 26, American gage) of the same length and fullthree times as wide, and, placing the two upon the lead anvil, witha hammer and the piece of file before used drive them into thelead. This will form the plate into what we may call an open trunk,which fits the square wire. Re
A practical treatise on mechanical dentistry . The operation is conducted as describedin the first case of fixed bridge-work down to the construction of 634 MECHANICAL DENTISTRY. the truss, for which in this method square gold wire is used. Hav-ing cut the wire to the proper length, lav it upon a piece of goldplate (about No. 26, American gage) of the same length and fullthree times as wide, and, placing the two upon the lead anvil, witha hammer and the piece of file before used drive them into thelead. This will form the plate into what we may call an open trunk,which fits the square wire. Remove the two from the lead together,and, without separating them, curve to the proper shape to formthe truss. Grind crowns having vertical holes, like the Bonwill, tofit, and having determined the proper points for the supporting pins,drill through both trunk and bar at these points. Separate the barfrom the trunk, and fit and solder pins to the bar. Construct smalltubes to fit the pins, ream out the holes through the trunk to admit Fig. them, and set the tubes with solder in the enlarged holes (Fig. 643).Fix the crowns permanently upon the tubes. They may bemounted in any of the approved ways, by vulcanizing or by theuse of a plastic filling material. Wben they are firmly set, placethe trunk with the teeth upon the bar and anchor it permanentlyas already described. Fig. 644 shows the completed work. In this method the truss consists of the bar and the open trunkwhich covers three sides of it. The bar is, of course, permanentlyattached to the roots of the molar and cuspid, but the trunk withthe teeth can be removed at any time. The second method of constructing a detachable bridge isapplicable to cases where one or both of the supports or piers aresound teeth. In the case adduced for illustration, the right inferior BRIDGE DENTURES. ^\ •cuspid crown was decayed, and both of the bicuspids and the firstmolar were absent. The supports for the bridge were the soundsecond mo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
