. Elementary and dental radiography / by Howard Riley Raper . e rays through the tooth atdifferent angles, , m^Wo-lingually and dwfo-lingually. (Fig. 419B.) Fig. 417. Showing hole in bone caused by abscess of lower second molar. If the perforation itself cannot be observed, bone destruction caused byit can sometimes be seen. In this connection I direct your attention to Fig. 417. Though theteeth are missing, observe the hole in the bone caused by a dento-alveolarabscess of the lower second molar. Figure 418 is a radiograph of Observe now that the hole caused by the abscess is seen
. Elementary and dental radiography / by Howard Riley Raper . e rays through the tooth atdifferent angles, , m^Wo-lingually and dwfo-lingually. (Fig. 419B.) Fig. 417. Showing hole in bone caused by abscess of lower second molar. If the perforation itself cannot be observed, bone destruction caused byit can sometimes be seen. In this connection I direct your attention to Fig. 417. Though theteeth are missing, observe the hole in the bone caused by a dento-alveolarabscess of the lower second molar. Figure 418 is a radiograph of Observe now that the hole caused by the abscess is seen where theroots of the lower second molar bifurcate. So in the practice of radio- 374 APPENDIX dontia the operator will often find, when looking for an abscess of a lowermolar (particularly the second) a dark area in the region of the bifur-cation of the roots and little or no bone involvement at the apices of theroots of the tooth under observation. The dark area in the region of thebifurcation will be looked upon as suspicious of a perforation through the. Fig. 41S. Radiograph of Figure 417.
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