A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . d here for the ateral expansion of the arch. The Drop and Arc Jacks are far superior to the straight jacks for crossing the upper arch back of the anterior ridge, as they do not present the same impleasant obstruction to the action of the tongue. Patients who are greatly annoyed and irritated with the one, will wear the other without complaint. In the irregularities shown, the club-shaped arches are flattened acrossthe front, and narrowed at the premolar and first molar areas. I
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . d here for the ateral expansion of the arch. The Drop and Arc Jacks are far superior to the straight jacks for crossing the upper arch back of the anterior ridge, as they do not present the same impleasant obstruction to the action of the tongue. Patients who are greatly annoyed and irritated with the one, will wear the other without complaint. In the irregularities shown, the club-shaped arches are flattened acrossthe front, and narrowed at the premolar and first molar areas. In addition to the CHAPTER XLIX. NARROW AND WIDE ARCHES 351 action of the expanding jack, a resilient arch-bow No. 20 or 22, shaped the same asthat shown in the disassembled appliance, is sprung into the attachments as illus-trated. These forces will tend to bring the arches to a position preparatory to thefinal truing with the regular arch-bow. When bodily expansion is demanded, and it is desired to employ the lingualjack-screw force, root-wise extensions may be soldered to stationary anchorages Fig. 251. i.»h. Fig. 252.
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
