A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . acial outlines. It was found, however, after a partial move-ment by this method, that the protruded apical zone was brought into strongerevidence than at first, and this demanded a bodily retrusive movement, which wasaccomplished, as shown on the right, with an apparatus similar to that shown inFig. 193, Chapter XXXVII. The three stages of this very interesting case arefully described and illustrated in Chapter XXI. CHAPTER XXXVI Type C, Division 2, Class II UPPER CORONAL PROTRU
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . acial outlines. It was found, however, after a partial move-ment by this method, that the protruded apical zone was brought into strongerevidence than at first, and this demanded a bodily retrusive movement, which wasaccomplished, as shown on the right, with an apparatus similar to that shown inFig. 193, Chapter XXXVII. The three stages of this very interesting case arefully described and illustrated in Chapter XXI. CHAPTER XXXVI Type C, Division 2, Class II UPPER CORONAL PROTRUSION WITH APICAL RETRUSION From causes not always possible to discover, protrusions of the crowns ofthe upper front teeth are accompanied with an easily recognized retrusion of theapical zone. As diseases of the naso-maxillary sinuses, caused from adenoids, mayarise in every physical character, inhibiting the development of the maxilla, itwould seem that this somewhat rare type illustrated in Fig. 189, is a fair sample ofthe effect of this local cause upon a case of inherited upper coronal protrusion. Fig. The labial inclination of the upper front teeth, with retruded incisive fossae,will tend to protrude the coronal zone and retrude the apical zone, thus deepeningthe naso-labial depressions, and often retruding the entire lower portion of the nosein relation to esthetic facial outlines. Of course there is every degree of dento-facial disharmony with the labial teeth in this same inclination, from decided 270 CHAPTER XXXVl. TYPE C. DIVISION 2. CLASS II. 271 protrusions of the coronal zone with the apical normal, to decided retrusions of theapical zone with coronal normal. It will be seen that the upper buccal teeth are in full mesial other words, they bite fully the width of a cusp in front of a normal this case presented, the first premolars had been extracted, and an attempthad been made to correct the protrusion. Before this, it was
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