A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . sharmony. This isaccomplished in cases of decided retrusions of the upper or the lower dentures bya bodily labial movement of the front teeth, leaving spaces between the premolarsfor the insertion of artificial teeth for retention and mastication. Fig. 209 is presented to emphasize the characteristic facial type of Division 1in this Class, and to show the mature expression which may be caused in the physiog- CHAPTER XLI. DIVISION 1. CLASS III. 297 nomy of a child twelve years of
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . sharmony. This isaccomplished in cases of decided retrusions of the upper or the lower dentures bya bodily labial movement of the front teeth, leaving spaces between the premolarsfor the insertion of artificial teeth for retention and mastication. Fig. 209 is presented to emphasize the characteristic facial type of Division 1in this Class, and to show the mature expression which may be caused in the physiog- CHAPTER XLI. DIVISION 1. CLASS III. 297 nomy of a child twelve years of age by a retrusion of the entire upper lip and lowerportion of the nose, with a concomitant deepening of the naso-labial lines. It alsoillustrates why it is at times necessary in cases of upper retrusion to first force thecrowns partly forward of the lowers so they can be grasped by the power and ful-crum arch-bows of the contouring apparatus. This case was presented in connection with a decided upper protrusion in thechapter on Dento-Facial Diagnosis, to show by intermedial facial casts the progres- FiG. sive effect on the facial outlines, first, by an inchnation movement of the crowns ofthe front teeth, and second, by a bodily movement. The intermediate facial casts,Fig. 124, Chapter XXI, to which the reader is referred, plainly show that when thecrowns alone are moved, there is no appreciable movement of the apical dento-facial zone. Cases of pronoimced upper retrusions, which markedly show a retrusionof the end of the nose, must be due to an abnormally retruded position of the truebone of the intermaxillary process with the nasal spine and cartilaginous septtimwhich supports the end of the nose in its relation to the nasal and malar , when the end of the nose is brought forward and its lines straightened,it follows that the entire intermaxillary bone with its alveolar process is movedforward with the bodily labial movement of its contained teeth. CHAPT
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