A practical treatise on mechanical dentistry . vertthe collar into a cap for the root. This cap must have pierced init such an aperture as will conform to the configuration of the pinor dowel best suited to the particular case in hand. Cap and pinwaxed together, should then be tried in the mouth, carefully removed,invested in calcined marble-dust and plaster, and soldered. Beingagain placed upon the root, an impression of it should be taken, aswell as of the two approximal teeth. Small trays especially made for the purpose (Figs. 412 and 413),will be found very convenient for taking impression
A practical treatise on mechanical dentistry . vertthe collar into a cap for the root. This cap must have pierced init such an aperture as will conform to the configuration of the pinor dowel best suited to the particular case in hand. Cap and pinwaxed together, should then be tried in the mouth, carefully removed,invested in calcined marble-dust and plaster, and soldered. Beingagain placed upon the root, an impression of it should be taken, aswell as of the two approximal teeth. Small trays especially made for the purpose (Figs. 412 and 413),will be found very convenient for taking impressions for crown-work. Plaster or modeling composition can be used in doing this. ARTIFICIAL CROWNS. 521 Upon its being ascertained that the cap, with pin attached, is in itsproper position in the impression, a plaster cast can be obtained,which, with a cast of the occluding teeth, should be placed in anarticulator. While the writer believes it to be the most accurate, whenmaking single crowns, to grind and adjust the tooth in the mouth, Fig. it frequently happens, from lack of time or other-reasons, that it isnot practicable; then the impression should be taken as directed. From this point succeeding steps will differ according to thecharacter of crown to be inserted. If it be an incisor, which is tohave a porcelain front, a plain plate tooth of suitable size, shape,and shade should be backed with pure gold, ground to positionupon the anterior portion of the cap, and united to it by adhesive Fig. 413.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
