A practical treatise on mechanical dentistry . ny permanent bridge could have been, though ithad no support on the left side back of the first bicuspid. The lower jaw was supplied with a double 20-carat gold plate,having a wide clasp on the first right bicuspid, which, after being BRIDGE DENTURES. 633 built up, presented a cone-shaped top, about which the clasp fittedso as to rest firmly upon the end of the tooth, thus preventing in-jury to the gums during mastication. The only peculiarity was that the second left inferior molar,being abnormally short, though well-formed and standing upright,w
A practical treatise on mechanical dentistry . ny permanent bridge could have been, though ithad no support on the left side back of the first bicuspid. The lower jaw was supplied with a double 20-carat gold plate,having a wide clasp on the first right bicuspid, which, after being BRIDGE DENTURES. 633 built up, presented a cone-shaped top, about which the clasp fittedso as to rest firmly upon the end of the tooth, thus preventing in-jury to the gums during mastication. The only peculiarity was that the second left inferior molar,being abnormally short, though well-formed and standing upright,was fitted with a wide clasp, extending about ]/§ of an inchabout the tooth, and a piece of gold plate with gold cusps wassoldered into its clasp, covering the molar crown and occludingwith the molar on the upper plate. (See Fig. 641.) This not onlyprevented the plate from being bitten down unpleasantly on thegums during mastication, but enabled me to use a shorter molarupon the upper than I otherwise could have done, and better al- FlG. lowed the antero-posterior and lateral movements of the jaws. Thecase as completed is shown in Fig. 642. Detachable Bridge by the Mandrel System.—A descriptionof two or three methods of constructing detachable bridges by themandrel system will suffice to indicate the general principles in-volved. Having these, each operator will find it an easy task todevise the modifications necessary to adapt a method to individualcases. The first method is especially applicable to cases where both endsof the bridge are attached to roots, as, for example, the inferiorcuspid and second molar roots of the left side, the interveningteeth having been lost. 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 t
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
