A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . chin and the prominence at the baseof the nose and along the upper portion of the upper lip. In many of these casesthe teeth are in perfect harmony of size and position with the protruded jaws—^inarch \vidth, alignment, and inclination—and yet distinctly out of balance with theesthetic relations of the rest of the features. In bimaxillary malpositions the denturesare often found in typical occlusion m the white as well as in colored races, becauseboth dentures are equally protru
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . chin and the prominence at the baseof the nose and along the upper portion of the upper lip. In many of these casesthe teeth are in perfect harmony of size and position with the protruded jaws—^inarch \vidth, alignment, and inclination—and yet distinctly out of balance with theesthetic relations of the rest of the features. In bimaxillary malpositions the denturesare often found in typical occlusion m the white as well as in colored races, becauseboth dentures are equally protruded. Again, in a large proportion of protrusions,the protrusion pertains mostly or wholly to the dental and alveolar arches an illustration of this, see the beginning of Dr. Cryers case. Chapter X, and thephysiognomies of bimaxillary protrusions illustrated in this work. Moreover,in nearly all typical protrusions of the dentures not due to local causes, the teethare crowded closely together, showing that the buccal teeth partake of the protrudedmalposition quite as much as the labial teeth. Fig. Attention is called also to the variety of antero-posterior malpositions of thelower denture in relation to the mandible. Fig. 4 is made from the facial casts oftwo cases before treatment. The mandible of the one on the right, judging from thefacial outlines, is seen to be decidedly prognathous, but from the relative positionof the lower lip, the lower denture must be in about normal dento-facial the case on the left, judging from the relative positions of the chin, the lower CHAPTER VIII. PRACTICAL APPLICATION OF BIOLOGIC LAWS 55 lip, and labio-mental curve, these conditions are reversed, that is: the mandible isin esthetic dento-facial relations, but with the lower denture protruded. These two cases like many others which could be pointed out in this work,illustrate the decided dissimilarity in types which may arise with the same characterof occlusion o
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