A practical treatise on mechanical dentistry . a moldin Melottes metal, as before described, take a piece of asbestosboard about one inch square and 34 °f an mcn thick, moisten it,and with a hammer drive the cusp button into it, flush with the sur-face of the button. (See Fig. 589.) Remove the button, and dry BRIDGE DENTURES. 6l3 the asbestos in a flame (Fig. 588). When perfectly dry, place asufficient quantity of gold scraps in the die made in the asbestos,and direct the blowpipe flame upon it until melted, inclining thecarbon stick, as shown, against the die for the double purpose ofconfinin
A practical treatise on mechanical dentistry . a moldin Melottes metal, as before described, take a piece of asbestosboard about one inch square and 34 °f an mcn thick, moisten it,and with a hammer drive the cusp button into it, flush with the sur-face of the button. (See Fig. 589.) Remove the button, and dry BRIDGE DENTURES. 6l3 the asbestos in a flame (Fig. 588). When perfectly dry, place asufficient quantity of gold scraps in the die made in the asbestos,and direct the blowpipe flame upon it until melted, inclining thecarbon stick, as shown, against the die for the double purpose ofconfining the heat and warming up the carbon stick. When thegold is fused into a button, press it into the die with the carbonstick (Fig. 590). Avoid the use of Hux when working with build up a cusp to make a perfect articulation in this manner,sealing-wax must be used instead of moldine, as in the method ofswaging the cusp. Warm the button before applying the wax, andwith a warm instrument shape the cusp as desired. Fig. 588. Fig. Gold Central, Lateral, and Cuspid Crowns.—Select from the40 different forms in the set that which is most suitable to thecase in hand (Fig. 591). (The forms are in pairs, showing labialand lingual surfaces.) Take the measurement of the root to becrowned with one of the annealed copper strips, binding the striparound the tooth with pliers and pinching the joint firmly off the surplus ends, and cut the measure (Fig. 592, a) throughthe center (Fig. 592, b), then bend the respective halves over thelingual and labial forms selected, at the necks, with the cut ends ofthe strips resting on the flat of the plate (Fig. 593). If the meas-ure is larger than the form selected, build the latter up with mold-ine until the space between the form and strip is filled (Fig. 593, b).Avoid getting moldine on the approximal surface. Remove thestrips, dry out the moldine by passing through a flame a few times,then place the form on the molding-p
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
