The independent practitioner : a monthly journal, devoted to medicine, surgery, obstetrics, dentistry, pathology and popular science . uneven, and discolored by the dye which had been absorbed, Isaw some of the spaces between the enamel prisms apparently dis-tended and filled with something which looked like this something had not been stained at all, the case was ratherdoubtful. In another instance, where the enamel was discolored to thedepth of about one hundred and fifty micrometers in such a man-ner as to leave no doubt that a change had taken place, I saw verydelicate funnel
The independent practitioner : a monthly journal, devoted to medicine, surgery, obstetrics, dentistry, pathology and popular science . uneven, and discolored by the dye which had been absorbed, Isaw some of the spaces between the enamel prisms apparently dis-tended and filled with something which looked like this something had not been stained at all, the case was ratherdoubtful. In another instance, where the enamel was discolored to thedepth of about one hundred and fifty micrometers in such a man-ner as to leave no doubt that a change had taken place, I saw verydelicate funnel-shaped excavations extending into the enamel forabout ten to twenty micrometers, and apparently containingmicrococci. With one or two other exceptions of like nature I havenot found in any of my preparations of this class a single instancewhere even the interstices of the enamel prisms had been pene-trated by micro-organisms. Dental Caries.—Miller. 303 In a second class of preparations, we find the enamel entirelydestroyed for a certain space, and the caries encroaching upon thedentine. (Figure 1.) Carious • * --!!- Sound Dentine. Figute 1 may serve to illustrate the manner in which the cari-ous tissue is distributed in such cases. As soon as the enamel is broken through, the caries extendsrapidly in a direction at right angles to the dentinal tubules,as well as parallel with them. Here is a very marked distinctionbetween the action of the agent which produces the softening ofthe dentine and that of the fungi; for while the former appearsto advance with about the same rapidity in all directions, the lattertravel very slowly in any course excepting one parallel with thetubules, since they can escape from one tubule to another onlythrough the very narrow and tortuous branches of the tubuii. This conclusion is fully confirmed by an examination of in-stances like that cited above, where that part of the softened den-tine which is still protected by e
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdentist, bookyear1883
