A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s force is only that which reacts frommoving the four incisors forward, and when distributed to all of the buccal teethof both sides, one cannot expect more than a slight proportional distal movementof these teeth from that source. Therefore, the intermaxillary^ force, which mayproperly be termed the great adjuster of occlusion, will be indicated in a largeproportion of cases. This is readily attached to the upper by clasping to the arch-bow the intermaxillary hook-tubes from wh
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s force is only that which reacts frommoving the four incisors forward, and when distributed to all of the buccal teethof both sides, one cannot expect more than a slight proportional distal movementof these teeth from that source. Therefore, the intermaxillary^ force, which mayproperly be termed the great adjuster of occlusion, will be indicated in a largeproportion of cases. This is readily attached to the upper by clasping to the arch-bow the intermaxillary hook-tubes from which the elastics extend to the disto-buccal aspect of the lower anchorages. At this juncture there should arise the important question as to the degreeof movement—if any—which the lower teeth should undergo for the greatestperfection to the facial outlines, so that in the construction of the appliances, theforces of reaction may be nullified, or on the other hand, utilized to the fullestextent. This special feature of the work is fully described in Chapter XVI, Inter-maxillary and Occipital Force, Fig. Not uncommonly the spaces between the laterals and premolars are nearly orquite closed, and the eruption of the cuspids has advanced so far they 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 m
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