. Orthodontia, or malposition of the human teeth; its prevention and remedy . an to cause the anterior ones to V^e forced backward, onaccount of the disparity of resistance. A number of methods for moving backward the cuspidand bicuspid teeth are described on pp. 141 and 143. Asimple plan for drawing in the four superior incisors, isshown in Fig. 130. Platinum bands are fitted to the lat- 178 ORTHODONTIA. Fig. 130. erals, and to their labial portions are soldered extensions ofgold, to cover and rest upon the labial surfaces of the ad-joining plain rubberplate is also madeto cover th
. Orthodontia, or malposition of the human teeth; its prevention and remedy . an to cause the anterior ones to V^e forced backward, onaccount of the disparity of resistance. A number of methods for moving backward the cuspidand bicuspid teeth are described on pp. 141 and 143. Asimple plan for drawing in the four superior incisors, isshown in Fig. 130. Platinum bands are fitted to the lat- 178 ORTHODONTIA. Fig. 130. erals, and to their labial portions are soldered extensions ofgold, to cover and rest upon the labial surfaces of the ad-joining plain rubberplate is also madeto cover the pala-tine arch, with agold hook insertedin its centre. Thebands being ce-mented in place,rubber rings areslipped undertheextensions andcarried to a point between the centrals and laterals, wherethey are drawn in and over the gold hook in the plate. Bytheir contraction, all four of the incisors are drawn inwardwhile but two of them are banded. A plan differing somewhat from the one just described, isthat of Dr. Kingsleys, illustrated in Fig. 131. The bandoverlying the in-. Authors Device for Retracting the Superior Incisors. Fig. 131. cisors is of gold,and has hookssoldered to theupper edge to pre-vent its slippingup to the gum. Itis also fitted witha thin strip of goldto pass between thecentrals, the freeend of which isconnected with the centre of a vulcanite plate by means of aring cut from rubber tubing. This rubber ring is made fastto the plate either by a ligature or by slipping it into ahorse-shoe slot cut in the plate for the purpose.
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidorthodontiaormal00guil
