Dental review; devoted to the advancement of dentistry. . Fig. 4. be crowned using little wax cups or half cups that are taken awaywhen the plaster is set. The plaster is then split, removed and sentto the work room. A separate model is taken of each tooth to becrowned. ORIGINAL COMMUNICATIONS. 735 On these models the crowns are then made in two pieces, back andfront, and these are adjusted at a subsequent sitting to the teeth inthe mouth. They are then wired tightly on to the teeth and a plasterimpression is taken with them in place. This gives their exact posi-tion, and the case can be finis
Dental review; devoted to the advancement of dentistry. . Fig. 4. be crowned using little wax cups or half cups that are taken awaywhen the plaster is set. The plaster is then split, removed and sentto the work room. A separate model is taken of each tooth to becrowned. ORIGINAL COMMUNICATIONS. 735 On these models the crowns are then made in two pieces, back andfront, and these are adjusted at a subsequent sitting to the teeth inthe mouth. They are then wired tightly on to the teeth and a plasterimpression is taken with them in place. This gives their exact posi-tion, and the case can be finished in the workroom. The porcelain teeth are ground and adjusted to place, a smallbox is made of thin platinum that exactly fits over the two pins ofthe tooth. Under this box a platinum tube is soldered which istapped with a screw thread. To the one end of the front half of thecrown a flange of gold plate is soldered, which is pierced by a hole to. Fig. 5. accommodate the head of the screw. These separate parts areassembled together and the biting surface is built up with wax andafterwards this is cast in gold. This is soldered to the back half ofthe crown or crowns and the last step is soldering the two halves ofthe crown together on the side opposite the screw. The bridge cannow be fitted in the mouth with guttapercha, screwed tight and theteeth cemented in and varnished. It is difficult to explain in words the different steps of the workbut a glance at the cases and photographs I have sent round will showany mechanic in a minute how the work is done. 736 THE DENTAL REVIEW. METHOD OF CAVITY PREPARATION FOR ABRAIDEDANTERIOR TEETH. BY W. B. TYM, D. D. S, CHARLESTON, ILL. In presenting this method to the profession I wish first toacquaint it with some of the conditions found in the case to bediscussed, though the method may be used in many other instances. The patient in this particular case is a gentleman of perhapsfifty-five ye
Size: 1987px × 1257px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookiddent, booksubjectdentistry
