A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . 256 PART VI. DEXTO-FACIAL MALOCCLUSIONS When the second molars have fully erupted, they should always carry thehooks for the intermaxillary elastics instead of the first molars, unless an extensivemovement of the buccal teeth is demanded. The important purpose of placing theattachments for the elastics at the most distal points in the mouth is to keep theforce in a horizontal or mesio-distal direction as much as possible. If it is necessaryto prevent the extruding tendency of th
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . 256 PART VI. DEXTO-FACIAL MALOCCLUSIONS When the second molars have fully erupted, they should always carry thehooks for the intermaxillary elastics instead of the first molars, unless an extensivemovement of the buccal teeth is demanded. The important purpose of placing theattachments for the elastics at the most distal points in the mouth is to keep theforce in a horizontal or mesio-distal direction as much as possible. If it is necessaryto prevent the extruding tendency of the intermaxillary force, the molar attach-ments should be anchored down, so to speak, and in such a way so they will not Fig. materially interfere with the mesial movement in view. This is accomplished bypassing the lower arch-bow under premolar buccal hooks. If the mesial movement of the lower buccal teeth demanded for normal occlu-sion is not more than one-half the width of a cusp, it usually may be accomplishedfor youthful patients with the ultimate preservation of occlusal contact of themolar planes. That is, the inclination which the extent of the movement at firstgives to the molars, will ultimately right itself if properly retained. In the chapter upon Principles and Technics of Retention will be found de-scribed methods for continuing the application of the intermaxillary force longafter the main work of correction is accomplished. This appliance is frequentlyplaced even before the normal relation of the buccal occlusion is attained. Cases occasionally arise in crowded premolar malalignments for which itseems desirable to utilize all of the intermaxillary force toward a labial movement
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