A practical treatise on artificial crown- and bridge-work . Fig. 487 represents another case in which a bridge was at-tached by a bar, partial cap, and retaining-pin. A is an uppersecond bicuspid (without antagonist); B, its inner cusp, cutdown; C, opening for retaining-pin; D, second molar, withslot for bar; E, cuspid; F represents the partial facing; G, theretaining-pin ; II, a molar crown of gold, with porcelain front;I, a platinum bar attached to the crown (II) and made to fit into Fio. a slot (at D); J, a plain plate cuspid, heavily backed and stronglysoldered to the partial cap, bu
A practical treatise on artificial crown- and bridge-work . Fig. 487 represents another case in which a bridge was at-tached by a bar, partial cap, and retaining-pin. A is an uppersecond bicuspid (without antagonist); B, its inner cusp, cutdown; C, opening for retaining-pin; D, second molar, withslot for bar; E, cuspid; F represents the partial facing; G, theretaining-pin ; II, a molar crown of gold, with porcelain front;I, a platinum bar attached to the crown (II) and made to fit into Fio. a slot (at D); J, a plain plate cuspid, heavily backed and stronglysoldered to the partial cap, but left without attachment to orcontact with the cuspid. Fig. 488 shows the bridge anchored in position. This case, after two years of wear, is still in perfect condi-tion and doing good service. As it w^as possible to keep the PARTIAL CAP AND PIS-BRIDQK METHODS. 243 ijoltl attaclniients, hackings, etc., out of sight, the appearancel)resentod is very natural. The ahsence of antagonizing teeth for the hicuspicls in eachof these cases was a favorahle condition, as a considerable thick-ness could be given to the crown-plate without any interferencewith occlusion. When the conditions are not so favorable,cutting down the inner cusp to the required extent and sinkingthe opening for the retaining-[)in to the necessary depth are pro-cesses certainly to be, as a rule, preferred to the entire removalof the crown for the purpose of ferruling the root for the mount-ing of a crown of gold and porcelai
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcrowns, bookyear1889
