Dental cosmos . from one to the other as occurs insympathetic ophthalmia, consequently these cavities are dealt with asseparate organs. The statistics then would show two hundred antrainstead of one hundred. These skulls were examined for five particu-lar points, viz, First, for abscessed teeth ; second, for septa ; third,for conical protrusion of the roots of the teeth into the antrum ; fourth,for perforation by the roots of the teeth without protrusion ; fifth, forperforation of the antrum from ulcerated teeth. ii3o THE DENTAL COSMOS. First. As to abscessed teeth and the connection of such a
Dental cosmos . from one to the other as occurs insympathetic ophthalmia, consequently these cavities are dealt with asseparate organs. The statistics then would show two hundred antrainstead of one hundred. These skulls were examined for five particu-lar points, viz, First, for abscessed teeth ; second, for septa ; third,for conical protrusion of the roots of the teeth into the antrum ; fourth,for perforation by the roots of the teeth without protrusion ; fifth, forperforation of the antrum from ulcerated teeth. ii3o THE DENTAL COSMOS. First. As to abscessed teeth and the connection of such abscesseswith the antrum. Only such teeth are mentioned as might most easilyproduce antral troubles, viz, the three upper molars ; the bicuspidsand cuspids being too far forward to be counted in these statistics. Imight say, however, that in a number of these skulls evidence ofulceration was found in the bicuspids and cuspid, with no apparentconnection whatever with the antra, save in one case. As to the Fig. molars, ulceration was found in more than twenty-five per cent, ofthe skulls, there being in these two hundred examinations, fifty-sevenulcerated teeth, and out of these fifty-seven possible cases of perfora-tion by inflammation and its results, we found such to be the case onlyfour times, all other cases having perforated the alveolar border anddischarged the pus into the mouth, two of them discharging both inthe mouth and in the antrum, as is evidenced by the specimen No. I(see Fig. i, #)* which I will pass about for your inspection. This * It is so difficult to reproduce these sections by cuts that the specimensthemselves must be seen in order to thoroughly comprehend many of thepoints referred to in the paper.—M. H. F. AMERICAN MEDICAL ASSOCIATION. 31 does not show a very large proportion of cases where antral troublehas come from the teeth, being less than eight per cent in fifty-sevenpossible cases. In addition to these figures I wish to offer as negative eviden
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