A practical treatise on mechanical dentistry . ng and soldering a gold tube over a piece of piano-wire of thesame size as the wire which is to exercise the traction. After thisis done, the gold tube is cut in its long axis, by which we get theopen cylinders. The posterior ends of these tubes are closed soas to receive the ends of the traction wire when in position. Whenthe crowns are secured in position with cement, a piece of piano-wire, previously shaped from the cast or die, is sprung into the opentubes. To exercise the necessary traction, the wire must be slightlyspread before placing it i
A practical treatise on mechanical dentistry . ng and soldering a gold tube over a piece of piano-wire of thesame size as the wire which is to exercise the traction. After thisis done, the gold tube is cut in its long axis, by which we get theopen cylinders. The posterior ends of these tubes are closed soas to receive the ends of the traction wire when in position. Whenthe crowns are secured in position with cement, a piece of piano-wire, previously shaped from the cast or die, is sprung into the opentubes. To exercise the necessary traction, the wire must be slightlyspread before placing it in the mouth. The placing of this wire requires some skill, but is, however,easily understood. To prevent oxidation the wire can be gold 444 MECHANICAL DENTISTRY. plated. The wire should be taken out every two or three daysand slightly expanded, then replaced. This appliance is shown in Figs. 236 and 237. Protrusion of the Upper Jaw.—One of the most efficient meth-ods of reduction in superior protrusion is that given by Dr. Angle*. Fig. It consists of anchor bands (D, Fig. 238) for the molar teeth,,with long tubes soldered to their buccal surfaces to receive thewire bow-spring, which rests in front in notched projections uponthe bands cemented to the central incisors. At the center of thebow-spring is soldered a short tube, having upon its labial sur-face a rounded projection to receive the standard (cupped at its free Fig. 237.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
