A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . test importance. In the progress of the operation, if it is found that the roots are being protrudedmore than they should be in proportion to the position of the crowns, the powerbow nuts at the mesial ends of the anchorage tubes should be unscrewed, andthis will allow the roots to move back. It will be seen with this combination, thatthe operator has full control over the individual movements of the roots and thecrowns of the incisors. CHAPTER XXXVII Type D, Division 2, Class I
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . test importance. In the progress of the operation, if it is found that the roots are being protrudedmore than they should be in proportion to the position of the crowns, the powerbow nuts at the mesial ends of the anchorage tubes should be unscrewed, andthis will allow the roots to move back. It will be seen with this combination, thatthe operator has full control over the individual movements of the roots and thecrowns of the incisors. CHAPTER XXXVII Type D, Division 2, Class II UPPER APICAL PROTRUSION Irregularities of this Type are far more rare than their opposites, Type C,probably because they seem to be unassociated with any condition that may haveresulted from a local cause. In their pronounced forms, they are characterizedby a decided prominence or bulginess along the upper part of the upper lip and baseof the nose, completely obliterating the naso-labial lines, while the lower partof the lip is not protruded. In all of these cases, the inherited protruded and en- FiG. Id. f ^.
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