A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . Upper and lower jaws in occlusion. teeth should be correct, but they are not to be found so in the skull from whichthis illustration was taken. The incisors are in occlusion, edge to edge, insteadof the upper one overlapping the lower one. A large amount of tooth tissue wasshown in the upper jaw, and a large quantity in proportion in the lower jaw. Inorder to have had proper occlusion it would have been necessary to have lost toothtissue laterally, in the lower jaw. If this be g
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . Upper and lower jaws in occlusion. teeth should be correct, but they are not to be found so in the skull from whichthis illustration was taken. The incisors are in occlusion, edge to edge, insteadof the upper one overlapping the lower one. A large amount of tooth tissue wasshown in the upper jaw, and a large quantity in proportion in the lower jaw. Inorder to have had proper occlusion it would have been necessary to have lost toothtissue laterally, in the lower jaw. If this be granted, then the question arises,when should it have been lost, and what tooth or teeth should have been extracted? Characteristic Features of Caucasian and Negro Skulls Fig. View of the under surfaces of skulls, 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
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