. Elementary and dental radiography / by Howard Riley Raper . Fig. 442. Angle of X-rays,arrow A, Fig. 440. Fig. 443. An-rle of X-rays,arrow C, Fig. 440. TiflS. 440, 441, 442 ana 443. necessary to make more than one radiograph to view the upper molar roots satisfactorily. Study Fig. 440. Directing the rays through the part indicated byarrow B will usually throw the mesio-buccal roota little to the mesial of the lingual root as seen in Fig. 441 . Directing the rays through the part as indicated by arrow A, will throw the mesio-buccal root farther to the mesial of the lingual root. (Fig. 442.) RE
. Elementary and dental radiography / by Howard Riley Raper . Fig. 442. Angle of X-rays,arrow A, Fig. 440. Fig. 443. An-rle of X-rays,arrow C, Fig. 440. TiflS. 440, 441, 442 ana 443. necessary to make more than one radiograph to view the upper molar roots satisfactorily. Study Fig. 440. Directing the rays through the part indicated byarrow B will usually throw the mesio-buccal roota little to the mesial of the lingual root as seen in Fig. 441 . Directing the rays through the part as indicated by arrow A, will throw the mesio-buccal root farther to the mesial of the lingual root. (Fig. 442.) READING RADIOGRAPHS 39i Directing the rays through the part as indicated by Arrow C, willthrow the disto-buccal root to the distal of the lingual root. (Fig. 443.) Quite often, when the disto-buccal root is thrown to the distal of thelingual root, the end of the disto-buccal root still cannot be seen—it seemsto be absorbed. (See Fig. 429, The First Molar.) This appearance isdue to the fact that the root is so small that it dees not throw a shadowof sufficie
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