A practical treatise on artificial crown- and bridge-work . oint of a camels-hair brush. A very small piece of pure gold is placed in theseam, and the tube is held in the fiame of an alcohol a suflicient degree of heat is reached, the gold will flowalong the seam and form a joint without obstructing the insidepassage for the pivot. The pivot is then inserted, and the tube 208 ARTIFICIAL CROWN- AND BRIDGE-WORK. trimmed (D) and gauged in a gauge-plate. With a drill justthe size of the tube the root-canal is enlarged so that the tubewill fit in tightly. This plan prevents weakening of t
A practical treatise on artificial crown- and bridge-work . oint of a camels-hair brush. A very small piece of pure gold is placed in theseam, and the tube is held in the fiame of an alcohol a suflicient degree of heat is reached, the gold will flowalong the seam and form a joint without obstructing the insidepassage for the pivot. The pivot is then inserted, and the tube 208 ARTIFICIAL CROWN- AND BRIDGE-WORK. trimmed (D) and gauged in a gauge-plate. With a drill justthe size of the tube the root-canal is enlarged so that the tubewill fit in tightly. This plan prevents weakening of the rootby too great enlargement of the canal. A hole the size of thetube is made through the cap, and cap and tube are then ad-justed (Fig. 411), and the pivot being withdrawn, they are re-moved, invested, and soldered (A, Fig. 412). The cuspid, whichbecause of its conical formation is one of the most ditficult teethin the mouth to clasp, is trimmed sufficiently to partially squareits approximal sides, and tiie palatal portion is notched slightly Fio (A, Fig. 413), to form a shoulder for the clasp to rest notch can be safely made, as the enamel is very dense atthe point indicated. A gold plate is swaged to fill the space between the centralroot and the cuspid as shown in Fig. 412. The cap and pivotare adjusted on the central root and the plate is then fitted inthe mouth, pressed tightly in position against the gum, andretained there with a little wax, which is cemented to the plateand pressed against the cuspid and side of the cap. An im-pression of the parts and an articulation are then taken inplaster. The cap, pivot, and plate being removed in the im-pression, they will be presented on the model made from it inexactly the same position as in the mouth. A second or outercap is then constructed for the root-cap, the band being madevery narrow at the approximal and palatal sides, and open at BEMOVA BLE PL. 1 TE BRIDGES. 209 the labial side, as the porcelain toot
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcrowns, bookyear1889
