A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . astics passing more directly from one jaw to the other are calculatedto exert a direct extruding force upon both the lower and upper buccal teeth. CHAPTER XXXIX. CONCOMITANT CHARACTERS. CLASS II. 287 The occipital bow A, in Fig. 78, shown in position, may be exchanged for occip-ital bow C, shown on the right, if a more direct retruding force upon the cuspids is demanded. General Bimaxillary Infra-Occlusion A more rare character of close-bite malocclusion, which may be properly t
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . astics passing more directly from one jaw to the other are calculatedto exert a direct extruding force upon both the lower and upper buccal teeth. CHAPTER XXXIX. CONCOMITANT CHARACTERS. CLASS II. 287 The occipital bow A, in Fig. 78, shown in position, may be exchanged for occip-ital bow C, shown on the right, if a more direct retruding force upon the cuspids is demanded. General Bimaxillary Infra-Occlusion A more rare character of close-bite malocclusion, which may be properly termedbimaxillary infra-occlusion, has occasionally fallen under the authors observa-tion for treatment. Though it differs quite decidedly from the typical close-bitemalocclusion, it is placed in this Class, because it requires similar methods oftreatment. It refers to cases in which both the front and back teeth are in an infra-occlusalposition in relation to a typical dento-facial occlusal plane, shown by the fact thatthe occlusal edges of the front teeth are in a marked intrusive position in relation to a reposeful parting of the lips, and also by the fact that when the jaws are closedin mastication the lips in contact are forced forward with a marked redundancy oflip tissue. See Fig. 201. In this case, the difficulty of occluding the teeth, with the production of a painfuldisturbance at the temporo-maxillary articulation, led to imperfect masticationof food, which was accomplished principally with the incisors alone. On the left isshown the profile cast with the teeth in masticating occlusion. It is unfortunatethat it does not fully express the facial disfigurement which was far more pronouncedthan is here indicated. The impression for the facial cast on the right was also taken at the sametime, but with the dentures held apart with modeling-compound for the purposeof showing the amount of extruding movement that would be necessary to produce 288 PART VI. DENTO-FAC
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