A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . hods shown in Fig. 240 will be foundeffective. On the right lateral, the liga-ture wire is passed around the tooth inthe form of a double loop and fastened tothe bow at the ends of a thin curved tubewhich is slipped on the bow before it isplaced. The curved tube, shown in theillustration, lies between the points ofattachment of the wire. The length ofthe tube can be gauged so that the wirewill exert an expanding force upon theadjoining teeth to make room for thelateral. The Matt
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . hods shown in Fig. 240 will be foundeffective. On the right lateral, the liga-ture wire is passed around the tooth inthe form of a double loop and fastened tothe bow at the ends of a thin curved tubewhich is slipped on the bow before it isplaced. The curved tube, shown in theillustration, lies between the points ofattachment of the wire. The length ofthe tube can be gauged so that the wirewill exert an expanding force upon theadjoining teeth to make room for thelateral. The Matteson attachment on the leftlateral consists of a strip of No. 28 or 30plate, cut as shown, and soldered to thelabial face of the band. The end is lappedover the bow and rolled in under with thepliers. The force is increased from timeto time by rolling it up on the of these methods, however, give far more pain in their treatment adjust-ments than the positive force of a screw, which is always sure, comparatively pain-less, and therefore to be preferred in the alignment of all exteftsive contrusions, and. 338 PART VII. UNCLASSIFIED MALOCCLUSIONS especially for inlocked upper incisors. The size of the arch-bow may be from to 19, according to the age of the patient and need of arch expanding the employment of the small sizes of spring arch-bows, the resilient force of thebow is always an advantage, and preferable for young patients where no particularexpansion of the arch is required. The double mesial and distal nuts at the molars are frequently of advantage forexpansion arch-bows. They lock the bow firmly in position, and permit a movementof it in either direction by unscrewing one nut and screwing up the other. It shouldbe remembered, however, that this locking of a tooth to a heavy arch-bow increasesits immovability, and establishes to that extent a stationary anchorage , in all instances when a distal movement of the buccal teeth is de
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