A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . he pro-jecting force of eruption has carried the points of the crowns well forward towardthe lingual aspect of the central incisors, demanding quite a decided distal move-ment in lifting and forcing them into alignment. One of the hooks for the attach-ment of the elastic force is shown on the right cuspid of cast B, just as the tooth isemerging from the gum. Cast C shows the cuspid sufficiently erupted to place CHAPTER LI. IMPACTIONS 371 bands^for the attachment of the hngual re
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . he pro-jecting force of eruption has carried the points of the crowns well forward towardthe lingual aspect of the central incisors, demanding quite a decided distal move-ment in lifting and forcing them into alignment. One of the hooks for the attach-ment of the elastic force is shown on the right cuspid of cast B, just as the tooth isemerging from the gum. Cast C shows the cuspid sufficiently erupted to place CHAPTER LI. IMPACTIONS 371 bands^for the attachment of the hngual reciprocating jack for the final rotation andlateral movement of the crowns into alignment. Fig. 278 illustrates the case of a girl sixteen years of age. The beginning casts Aand B show two fairly well formed upper laterals on the right side and that no cus-pid has erupted on that side. No prominence of the gum indicated the presence ofthe missing cuspid. The supernumerary lateral is plainly located as the one next tothe central, by its larger size and slight difference in shape as compared to the other Fig. two laterals. Notwithstanding the fact that the supernumerary lateral was badly dis-figured by a yellowish channel across its labial face, shown by the preserved tooth andcast, not one of the good dentists who cared for her teeth thought to look for an im-pacted cuspid by the aid of the X-ray now shown by the radiogram. As shown by cast C, the supemvunerary was removed, the distally located lateral was forced forwardto place, and the impacted cuspid, now in a partial state of eruption, is ready for the final adjustment. Impaction of Upper Central Incisors Fig. 279 illustrates the case of a girl fotirteen years of age. Cast A made froman impression taken at beginning of operation shows no prominence of the gumsurface to indicate the presence of the missing incisors. The radiogram shows the 372 PART VII. UNCLASSIFIED MALOCCLUSIONS two central incisors above two impacted s
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
