. Transactions . e opened in placing the wire and finally closed around the wire passes along the labial and buccal surfaces of theteeth as an alignment wire and into an anchorage tube on the oppo-site molar, where it is usually threaded to carry a nut at each endof the tube. By applying power at the nut D it exerts a recip- 80 ILLINOIS STATE DENTAL SOCIETY. locating jack force to open the space required, while the tautnessof the alignment portion of the wire can be accurately controlledby the two nuts at the molar tube. Instances will arise when itwill be desirable to exert a tracti
. Transactions . e opened in placing the wire and finally closed around the wire passes along the labial and buccal surfaces of theteeth as an alignment wire and into an anchorage tube on the oppo-site molar, where it is usually threaded to carry a nut at each endof the tube. By applying power at the nut D it exerts a recip- 80 ILLINOIS STATE DENTAL SOCIETY. locating jack force to open the space required, while the tautnessof the alignment portion of the wire can be accurately controlledby the two nuts at the molar tube. Instances will arise when itwill be desirable to exert a traction force at this point. Again, itcan be made to act as a spring bow to which the incisors may beligated, to enlarge the incisal arch. When the cuspid space is onlypartially closed this apparatus, without the lingual portion, willanswer every purpose. When the eruption of both cuspids is pre-vented, as in Fig. 0, the movable bicuspid anchorage can be dupli-cated on both sides. In cases where the cuspid spaces have. Fig. 5. become entirely closed and more power is required, the lingualjack can be added in the construction, as shown in Fig. 5. Fig. 7 shows a variation of the apparatus demanded byslightly changed conditions. Class IIf.—With many upper abnormal protrusions thebite is so short that the lower incisors strike the upper gums backof the incisor ridge, making it impossible to reduce the protrusionuntil this feature of the condition is corrected. Fig. 8 correctlyrepresents a section of the models of a case in practice. Several years ago I invented and published the very effectiveapparatus for opening the bite, shown in Fig. 9. The incisorand bicuspid bands are .003 of an inch thick. The hooks, whichare wide and smoothly polished, where they come in contact with & NEW METHODS AND APPLIANCES IN ORTHODONTIA. 87 the mucous membrane, are soldered to upper edge of the incisorbands and turned up, and to the lower edge of the bicuspid bandsand turned down. Shell crowns are made
Size: 1445px × 1729px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, booksubjectdentist, bookyear1865
