. Elementary and dental radiography / by Howard Riley Raper . Fig. 271. Radiograph of a dry skull. One antrum is filled with lead shot, the other hasa molar tooth in it. This radiograph is clearer than one made from the living subject be-cause there were no soft parts or circulating blood to blot out detail. in a permanent cure. The size, shape and location of the antrum canbest be observed stereopticallv. Often, however, a good idea of its size,shape and location can be obtained from a radiograph, like Fig. 276,for example. Radiographs of the antrum made on films held in the mouth 236 DENTAL
. Elementary and dental radiography / by Howard Riley Raper . Fig. 271. Radiograph of a dry skull. One antrum is filled with lead shot, the other hasa molar tooth in it. This radiograph is clearer than one made from the living subject be-cause there were no soft parts or circulating blood to blot out detail. in a permanent cure. The size, shape and location of the antrum canbest be observed stereopticallv. Often, however, a good idea of its size,shape and location can be obtained from a radiograph, like Fig. 276,for example. Radiographs of the antrum made on films held in the mouth 236 DENTAL RADIOGRAPHY. Fig. 372. A, antrum with pus in it. B, healthy ) (Radiograph by Carman, of St. are very misleading and confusing, as witnessed in Fig. 275, which wasmade on a film held in the mouth, and is of the antrum filled with leadshot—illustrated in Fig. 271. The dots outline a very large antrum. An open-Tig. 276. ing made at the favorite site for opening into theantrum through the mouth, above their apices, be-tween the second bicuspid and first molar (the first molar has been ex-tracted), would not puncture this antrum at its lowest point. The rootof the second molar seems to penetrate the antrum. Whether it actuallypenetrates the floor of the antrum or not I cannot say definitely, because THE USES oi; run kadiolkmU is dentistry 237
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