A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . premolars on each side for the insertion of artificial teeth, the advantages of whichhave been described. The upper anchorages also aided in retruding the lowerfront teeth. The final result is shown in Fig. 221. Fig. 222 was made from the facial and dental casts of a miss at eleven andthirteen years of age, which illustrates on the left the effect of a combination ofthe local cause of adenoids, producing a retruded upper; with that of heredity,producing a protruded lower denture
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . premolars on each side for the insertion of artificial teeth, the advantages of whichhave been described. The upper anchorages also aided in retruding the lowerfront teeth. The final result is shown in Fig. 221. Fig. 222 was made from the facial and dental casts of a miss at eleven andthirteen years of age, which illustrates on the left the effect of a combination ofthe local cause of adenoids, producing a retruded upper; with that of heredity,producing a protruded lower denture in relation to a normal mandible. The decided CHAPTER XLIV. DIVISION 3. CLASS III 315 protruded position of the lower front teeth in relation to the upper gave one theimpression that the mandible was held forward of the normal masticating late Dr. Chas. Butler, who saw this case in its early stages, believed this to bea fact, until in his effort to make her close her lower jaw further back, she suddenly-forced it in the usual functional distance forward of this. Fig. Fig. When this case presented for treatment, the deciduous lower cuspids and molarshad been removed, leaving on the lower jaw only the fully erupted incisors andfirst permanent molars with the permanent cuspids just commencing to prickthrough the gums. Fig. 223 partially illustrates the lower apparatus that was employed in this case, in addition to the apparatuson the upper for bodily labial movement of the inci-sors. It illustrates the principle of sustained anchor-ages which is fully defined and illustrated in ChapterXV. This was demanded because of the necessity ofreinforcing the stability of single molar anchorageson each side. The lingual arch-bow resting in theincisor hooks easily glides into the long-bearing tubeswith firmly sustained attachments to heavy molarbands. The labial arch-bow No. 22 or 23 is sustainedon the incisors by open tube attachments (not shown by the engraver). It
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