A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . lls, showing difference be-tween Fan Tribe West African skull and the Caucasian. Fig. 21 is made from the tinder surface of two skulls. The one on the leftis that of a Fan Tribe West African, the other is from a Caucasian. They differ CHAPTER X. TYPICAL AND ATYPICAL OCCLUSION OF THE TEETH 75 greatly in the shape of the roof of the mouth and the Hne of the occluding sur-faces of the teeth. For these types of skulls they are normal in the arrangementof the teeth, with the exceptio
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . lls, showing difference be-tween Fan Tribe West African skull and the Caucasian. Fig. 21 is made from the tinder surface of two skulls. The one on the leftis that of a Fan Tribe West African, the other is from a Caucasian. They differ CHAPTER X. TYPICAL AND ATYPICAL OCCLUSION OF THE TEETH 75 greatly in the shape of the roof of the mouth and the Hne of the occluding sur-faces of the teeth. For these types of skulls they are normal in the arrangementof the teeth, with the exception of those lost by decay. The line of the occludingsurfaces of the white skull is too nearly circular, however, to be termed special difference in these skulls is this: In the negro, if the outer line of thezygomatic arch be carried around until it intersects the teeth, that line will benear the anterior surface of the second molars; while in the other skull the linewould be in front of the first molar, showing that the teeth are carried forwardin the negro skull the width of a molar tooth. Fig. Two mandibles — A. from a Fan Tribe West African negro; B. from a Cau-casian, showing difference in position of teeth relative to the ramus, mentalforamen, and symphysis menti. Fig. 22 is made from two mandibles. The upper one is from the same FanTribe negro as shown in Fig. 21; the lower one is from another Caucasian the position of the third molar of the negro jaw be examined, it will be seen thatthere is room for another molar back of the third, while in the mandible of the whiteskull the third molar is far back, leaving no room for another tooth. In the negrojaw the mental foramen will be found below the first molar, while in the whitejaw it is on a line drawn downward from between the bicuspids, showing again thatin the negro skull the teeth are carried forward about the width of a molar tooth. 76 PART in. BASIC PRINCIPLES OF PRACTICE Fig. 23.
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