A practical treatise on mechanical dentistry . i of an inch. A thin iridioplatinum band was then made to encircle the root,passing just under the gum and being slightly longer than theheaded pin. This band was perforated with two rows of holes,from without inward, giving the inner surface a roughness similarto that of a nutmeg grater. The band and pin were then madesecure to the root with a non-shrinkable copper amalgam. Fig. 639 shows the upper jaw ready for the plate. I must mention here that this method of lengthening the bi- Fig. cuspid is not original with me, but has been previousl
A practical treatise on mechanical dentistry . i of an inch. A thin iridioplatinum band was then made to encircle the root,passing just under the gum and being slightly longer than theheaded pin. This band was perforated with two rows of holes,from without inward, giving the inner surface a roughness similarto that of a nutmeg grater. The band and pin were then madesecure to the root with a non-shrinkable copper amalgam. Fig. 639 shows the upper jaw ready for the plate. I must mention here that this method of lengthening the bi- Fig. cuspid is not original with me, but has been previously describedby Dr. E. Parmly Brown. I have, however, used this methodseveral times on very frail roots, and cemented over it a gold capcrown. In the present case, after the amalgam had become hard andthe end and sides had been polished, a gold crown was fitted overall just up to the margin of the gum, and in close contact with theend of the band and amalgam. This crown was loose enough toadmit of its sliding on and off, though with just enough friction tohold it in place when at rest. This gold crown was then placed inposition, the plate also inserted, and hard wax used to firmly jointhe two in the mouth. They were then removed and soldered. 6.^2 MECHANICAL DENTISTRY. Gold pins were then placed through holes drilled in the plateinto the tubed cuspids; then soldered to the plate, the pins beingof a size to fit the tubes accurately. The plate was also providedwith a wide clasp encircling the first molar on the right. The plate was the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
