. Electro-radiographic diagnosis; a book on the electric test for pulp vitality, giving the technic of its use in detail and submitting clinical evidence of its absolute necessity to dental diagnosis . Fig. 118. Fig. 119. 144 ELECTRO-RADIOGRAPHIC DIAGNOSIS Figs. 120 and 121. Radiograplis of the same case madeat different angles. Fig. 120 was made with the x-rayspassing straight through the teeth from facial to 121 was made with the x-rays passing diagonallythrough the teeth from facial to lingual. Note how in-distinct the root outlines are in Fig. 121. I have seen thisindistinctne
. Electro-radiographic diagnosis; a book on the electric test for pulp vitality, giving the technic of its use in detail and submitting clinical evidence of its absolute necessity to dental diagnosis . Fig. 118. Fig. 119. 144 ELECTRO-RADIOGRAPHIC DIAGNOSIS Figs. 120 and 121. Radiograplis of the same case madeat different angles. Fig. 120 was made with the x-rayspassing straight through the teeth from facial to 121 was made with the x-rays passing diagonallythrough the teeth from facial to lingual. Note how in-distinct the root outlines are in Fig. 121. I have seen thisindistinctness of root outline due to angle mistaken forabsorption of the root due to disease. The roots par-ticularly susceptible to this sort of distortion are : (1) Up-per bicuspids (2) Lower molars (3) Mesio-buccal rootsof upper molars. Where the electric test can be applied satisfactorily anda positive reaction is obtained, the appearance of rootroughness due to angle cannot be mistaken for absorptionof the root. There is a radiolucent area in the mesial sur-face of the first bicuspid which has the appearance of acarious cavity; it is the interproximal space. Figs. 122 and 123. Two radiographs of the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1921
