. Elementary and dental radiography . iograph by Pancoast, of Philadelphia.) Fig. 165 is also a case of Dr. Cryers. TheTIfi. 165. radiograph shows an impacted upper third molar, with the occlusal surface presenting upwards. remarks concerning this case are interesting. I quote Dr. Cryer:Fig. 165 shows the occluding surface of the upper third molar pointingupward towards the posterior portion of the orbit. The patient hadbeen suffering from disturbance of the eye for a long time. Considerableimprovement took place in the eye soon after extraction of the invertedtooth. 10. to Determine
. Elementary and dental radiography . iograph by Pancoast, of Philadelphia.) Fig. 165 is also a case of Dr. Cryers. TheTIfi. 165. radiograph shows an impacted upper third molar, with the occlusal surface presenting upwards. remarks concerning this case are interesting. I quote Dr. Cryer:Fig. 165 shows the occluding surface of the upper third molar pointingupward towards the posterior portion of the orbit. The patient hadbeen suffering from disturbance of the eye for a long time. Considerableimprovement took place in the eye soon after extraction of the invertedtooth. 10. to Determine the number of Canals in Some will be noticed that I say to determine the number of canals insome teeth. Of course, it is not necessary to use the radiograph each 77//: USIiS 01 run RADIOGRAPH IX DliXTISTRV 173 time we open into a tooth to learn how many canals that tooth may occasionally I do find it necessary or expedient to use the radiographto verify or disprove the existence of some unusual condition Fig. l().j. Impacted uijper tliird molar with tlie occlusal surface pointing upward. (Radiograph by Pancoast, of Philadelphia.) Case: An upper first molar in which but oneTifl. 166. small canal could be found. After searching for the other two canals for a few minutes, the one canalwas filled with gutta-percha, and a radiograph made (Fig. 166) ; thisshows that the tooth had but one canal. In this case the radiograph savedconsiderable work and worry on the part of the operator. I have knownsecond and third molars to have only one canal but this is the only caseI have ever encountered in which a first molar had but one canal. This case was in the hands of one of the most Tig. 167. expert operators in Indianapolis. The lower first bicuspid had been devitalized, and the pulp removed, 1/4 DENTAL RADIOGRAPH) but the tooth remained sore. Radiography was resorted to to learn, ifpossible, the cause of the persistent pericementitis. A piece of ligaturewire,
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