A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . ciples of a modification by the author, to increase the mechanical advantage of themethod by employing a No. 18 bow rolled to a thickness of .020 and a width . This greatly increases the comparative distance between the points of powerand fulcrum, and being placed at the gingival margins, it decreases the distance tothe area of work or alveolar resistance, both of which greatly increase the mechanicaladvantage. Again, the arch-bow being rolled only over its incisal dimens
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . ciples of a modification by the author, to increase the mechanical advantage of themethod by employing a No. 18 bow rolled to a thickness of .020 and a width . This greatly increases the comparative distance between the points of powerand fulcrum, and being placed at the gingival margins, it decreases the distance tothe area of work or alveolar resistance, both of which greatly increase the mechanicaladvantage. Again, the arch-bow being rolled only over its incisal dimensions, asshown in Fig. 62, the protruding power of the bow is greatly increased. Fir,. This torsional method of bodily movement is hardly to be compared with thelong tried effectiveness, mechanical advantages, and physiologic control of the reg-ular bodily movement apparatus, the principles of which are shown in Fig. 61,C and D. Note the relatively increased distances between power and fulcrum,and decreased distances to the center of resistance or weight, shown by the arrows. The bodily disto-mesial movement of buccal teeth to close spaces after extrac-tion so as to leave no inverted V-shaped interproximate space to pocket food is ofthe greatest importance. This is accomplished by ingenious devices for applyingthe power upon lingual and buccal root-wise extensions aided by an occlusal screw 116 PART IV. TECH NIC PRINCIPLES OF PRACTICE bar fulcrum resistance, or by long-bearing telescoping tubes at the occlusal Stationary Anchorages, Chapter XV, and the closing of Abnormal Inter-proximate Spaces, Chapter L. Also see Figs. 266 and 268, Chapter L; and Cha
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
