. Elementary and dental radiography / by Howard Riley Raper . ntirely too little. A systematic radiographic study ofthe subject is bound to result in the disclosure of interesting and im-portant facts. A question, the answer to which is of extremeTig$. 300 and 30i. importance is, Do alveolar abscess cavities becomefilled with bone after the abscess is cured ?* My ex-perience leads me to believe they do; but the new bone may not be quite asdense, and it is susceptible to ready disintegration as a result of contiguousinflammation. Observe Fig. 300, a case from the practice of Dr. R. Otto-lengui.
. Elementary and dental radiography / by Howard Riley Raper . ntirely too little. A systematic radiographic study ofthe subject is bound to result in the disclosure of interesting and im-portant facts. A question, the answer to which is of extremeTig$. 300 and 30i. importance is, Do alveolar abscess cavities becomefilled with bone after the abscess is cured ?* My ex-perience leads me to believe they do; but the new bone may not be quite asdense, and it is susceptible to ready disintegration as a result of contiguousinflammation. Observe Fig. 300, a case from the practice of Dr. R. Otto-lengui. Note the light areas at the apices of both the centraland lateral. A cursory observation of the radiograph, and a failureto consider clinical history, would result in the diagnosis of abscess ofboth the central and lateral. Observe, please, however, that the canal ofthe central is well filled, while the canal of the lateral is not filled at all. * For a further consideration of this suhiect see Appendix Chap. XT. THE USES OE THE KAD10GKAEH LX DENTISTRY 265. 5 c ■3 ^ E £ i C c 60 c 266 DENTAL RADIOGRAPHY The central had been filled three years previously to the making of theradiograph, and there had been no recurrence of the abscess during thattime. The lateral was treated ami its canal filled, when all symptoms ofabscess disappeared. Fig. 301 was made after the canal of the lateral wasfilled. What I shall speak of now I fear cannot be seen in the accompany-ing half-tone; but it can be observed easily in the negatives. At the apexof the central there is a deposition of bone in the old abscess bone is not as dense as the surrounding structure, and hence the out-line of the old cavity can still be seen; but it is sufficiently dense, so thatit can be observed distinctly, and especially well when compared withthe cavity at the apex of the lateral, which has not been freed from in-fection long enough to permit of an osseous formation within it. Just what changes occur
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