. Elementare und zahnärztliche Radiographie . hergestellt auf einer großen Platte (Abb. 101 und 102 1 oder einem Film auf der Außenseite des Mundes (Abb. L 97, S. Mit dem Theradiograph, um den Verdacht zu bestätigen und die genaue Lage des Zahns zu zeigen, kann der Bediener den Patienten betäuben, den Mund mit einer Mundstütze öffnen und den Zahn extrahieren. I*ig. 299 i- ein Fall, in dem die Mündung couldfjg. 299. Nicht geöffnet werden wegen der Entzündung durch den betroffenen unteren dritten Molar im Radio-Graphen gesehen verursacht. DIE VERWENDUNG DER RÖNTGENAUFNAHME IN DER ZAHNMEDIZIN 263 62. TN Forschungsarbeit zum Studium der Osteologie, der Entwicklung
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. Elementary and dental radiography . made on a large plate (Figs.101 and 102 1 or a film on the outside of the mouth (Fig. 97). With theradiograph to confirm suspicions and show the exact location of the of-fending tooth, the operator may proceed to anesthetize the patient, forcethe mouth open with a mouth prop and extract the tooth. I*ig. 299 i- a case in which the mouth couldfjg. 299. not be opened because of the inflammation caused by the impacted lower third molar seen in the radio-graph. THE USES OF THE RADIOGRAPH IN DENTISTRY 263 62. Tn Research Work to Study Osteology, the Development of the teeth, Action ofBismuth Paste, Bone Production and Destruction, Changes Occurring in the tern-poro-ltlandibular Articulation When Dumping the Bite, Blood Supply to Parts, Re-sorption of teeth and the Causes for Tt. €tc. The value of the radiograph to the man who is looking for the just-how and why of things is clearly apparent. It obviates the necessity ofconjecture, and gives us simple, indisputable facts. Many problems now. Fig. 299. Impacted lower third molar, causing a false ankylosis. (Radiograph by Graham. of Detroit.) confronting the dental scientist can be solved only by the intelligent andpersistent use of the X-rays. It is not my intention now to tell of all the different uses to whichthe radiograph has been and may be put in the broad field of dentalscientific research. I could not if I tried. I shall mention but a few. Dr. Joseph Beck, by the use of the stereoscopic radiographs, is mak-ing a comparative study of the pneumatic sinuses of man and the loweranimals. 264 DEXTAL RADIOGRAPHY Dr. Johnson Symington and Dr. J. C. Rankin have recently publisheda book, An Atlas of Skiagrams; illustrating, in twenty radiographs, thedevelopment of the teeth and jaws from birth to the age of sixteen years. I have demonstrated the action of bismuth paste in one case. (Fig.223. ) No definite conclusions should be drawn from this single case. Thefield of research work along
