A text-book of dental histology and embryology, including laboratory directions . ^?£J5 Part of a section from a tooth shown in Fig. 125. It shows a mild type ofinjury from atrophy. The growth of enamel was interrupted, but not zone of interglobular spaces in the dentine separates the dentine formed beforethe interruption from that formed after. (Black.) White Spots.—White spots are often seen (Fig. 130) inthe enamel of one or two teeth. The surface in these casesis usually smooth and vitreous like the rest of the ground through such spots show that in the area ofthe
A text-book of dental histology and embryology, including laboratory directions . ^?£J5 Part of a section from a tooth shown in Fig. 125. It shows a mild type ofinjury from atrophy. The growth of enamel was interrupted, but not zone of interglobular spaces in the dentine separates the dentine formed beforethe interruption from that formed after. (Black.) White Spots.—White spots are often seen (Fig. 130) inthe enamel of one or two teeth. The surface in these casesis usually smooth and vitreous like the rest of the ground through such spots show that in the area ofthe spot the rods have been perfectly formed, but no cement- ATROPHY 163 ing substance. When such an area is entirely within thesubstance of the enamel, as they usually are, and the surfaceof the tooth is covered with normal tissue, the spot remainswhite, or with the same appearance it had when the tootherupted. If the defective structure reaches the surface theymay become more and more stained. Fig. 127. Section of incisors, showing two zones of atrophy, appearing as two grooves on thesurface. (About 8 X) (Black.) The spaces between the rods are occupied by air and therefraction diffuses the light, causing the white is no way to remove these spots except by polishingaway the tissue, and this is never advisable. When the white 164 THE EFFECT OF CARIES ON THE ENAMEL area reaches the surface of the enamel it is not smooth andpolished, as in the normal condition, but rough and or two cases have been reported in which all of the Fig. 128 W
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectteeth, bookyear1912
