A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . 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
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . 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. Side view o( a prognathous negro skull with eighteenteeth in the upper jaw. Fig. 23 is from the skull of another negro who died while in the PhiladelphiaHospital. The prognathism is not so marked as in the one belonging to the FanTribe West African. The mental foramen in this case is situated on a line betweenthe second bicuspid and the first molar. In the upper jaw there are eighteenteeth, the two most distal being rudimentary fourth molars. Barring these fourthmolars, all the other teeth are in good occlusion. If this condition of the teethwere exhibited in the white race, which would give the appearance of that shownin the next figure, it would be good surgery to remove the upper and lower bicuspidsor the upper and lower first molars on each side. Prognathous Appearance Caused by Hypertrophied GumsAND Alveolar Processes Not having an anatomical specimen showing this kind of prognathism,your essayist has taken the liberty to show Fig. 24, which was made frora the Fh,. 24.
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
