A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . preventplacing a heavy arch-bow on the outside of the dental arch. This is well shown inFig. 138. When this occurs, the apparatus shown in Fig. 139 will be lingual yoke push bow here shown with premolar movable anchorage attach-ments, is one of the most practical and eftective combinations in the authorspractice. It is similar in its action to that shown in Fig. 137, but is far more appli-cable for extensive movements. CHAPTER XXIV. TYPE B. DIVISIOX 1. CLASS I. 211
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . preventplacing a heavy arch-bow on the outside of the dental arch. This is well shown inFig. 138. When this occurs, the apparatus shown in Fig. 139 will be lingual yoke push bow here shown with premolar movable anchorage attach-ments, is one of the most practical and eftective combinations in the authorspractice. It is similar in its action to that shown in Fig. 137, but is far more appli-cable for extensive movements. CHAPTER XXIV. TYPE B. DIVISIOX 1. CLASS I. 211 The lingual yoke bow is designed to exert an evenly distributed pressure upon the front teeth and prevent the lateral incisors from sliding along the bow. The yoke and bow are attached together by fitting the two into an ellipt-cal tube which has been made by slightly flattening a round seamless thin tube, by passing it through the rollers. When in place, the V-spaces are closed by pinching the central portion of the tube with V)lunt cutting pliers. The joint is then firmly attached with soft-solder. Fig. In connection with this, the author usually employs at the beginning of theoperation a light alignment bow. No. 22 or 23, principally for its resilient action asshown in the buccal views of the apparatus. There is no use in attempting to force a cuspid or other teeth into alignmentuntil there is sufficient room for them to move in. In nearly all instances wherethe cuspids are in the position shown, they will usually move into place withoutartificial aid as rapidly as space is made for their eruption into normal position. In assembling the apparatus, the yoke of the lingual bow is bent to rest properlyagainst the front teeth, engaging with hook attachments on the incisor the arch is of normal width, the distal ends of the bow should lie evenly in theanchorage tubes without pressure; but if the molar area of the arch is laterallycontracted or expanded, the bow sh
Size: 1935px × 1291px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
