A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . preferably seamlessâshould have very thinwalls. No. 32 or 34, and should be drawn to fit the bars exactly, so as to hug theband and present no prominent or irritating edges, and to take such position onthe tooth, when placed, as will be most effective for its rotation. In placing thelever, see that its length is such as to allow it to hook to the arch-bow at an inter-proximate position in relation to the teeth, and bend the hook so that when thelever is placed it will lie smooth
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . preferably seamlessâshould have very thinwalls. No. 32 or 34, and should be drawn to fit the bars exactly, so as to hug theband and present no prominent or irritating edges, and to take such position onthe tooth, when placed, as will be most effective for its rotation. In placing thelever, see that its length is such as to allow it to hook to the arch-bow at an inter-proximate position in relation to the teeth, and bend the hook so that when thelever is placed it will lie smoothly along the bow. It will be noticed that therotating tubes are placed at the most favorable position to obtain the greatestrotating leverage. Positive Reciprocating Force.âFor the rotation of teeth which are extensivelyturned, especially the cuspids, premolars, and central incisors, the applicationof positive reciprocating force (a principle which the author introduced in the early90s) is certainly the ideal method for rotating a tooth upon its long axis, whereconsiderable force and movement is CHAPTER XLVIII. MALT URN ED TEETH 341 In nearly all cases which require extensive rotation, and which do not requireinclination movement, it will be found by a little study that reciprocating forcescan in some form be applied. A not uncommon malposition is that of a centralincisor turned one-quarter around and locked in that position by adjoining teeth,as shown in Fig. 242. A No. 19 fork-end jack, resting on a lingual spur hook on themaltumed incisor, exerts a rotating force, the reaction of which being received uponthe lingual bar attached to the right central, cuspid, and molar, sustains the integ-rity of the arch, and exerts a uniform expanding force to open the space; while Fig. 242. Fig. 243.
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