At the University of Minnesota Hospital, in an effort to correlate oral sepsis with systemic lesions, particularly in patients exhibiting rheumatoid conditions, special inspection of mouths was made for pyorrhea, gingivitis, caries, and by means of the Roentgen ray, for apical abscesses. We were struck by the fre
quency of apical abscesses in these cases. Routine work was extended to all patients in the hospital in the medical service. Further search was made for apical abscesses by studying the roentgenograms of the mouth in a medical Roentgen-ray laboratory, the
purposes of the roentgenograms in many instances being remote from that of ours. The findings are as startling as they are of significance. A little over 68 per cent, of all artificially devitalized teeth were found with apical abscesses, and the total number of abscesses, on 1,350 dead teeth, including those found on pulpless teeth due to caries or accident or
ULRICH HL. THE BLIND DENTAL ABSCESS. JAMA. 1915;LXV(19):1619–1621. doi:10.1001/jama.1915.02580190025007
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