. Radiography and radio-therapeutics . its socket. The temporo-maxillaryarticulation of either side can be satisfactorily shown by centering the tubebehind and a little below the angle of the jaw on the more distant aspectfrom the plate. The most satisfactory method of showing injuries in theregion of the upper or lower jaw is undoubtedly the stereoscopic, the advan-tage being that by this method the parts may be viewed in the stereoscopefrom either side by changing the plates, in one position the film surfaceis outwards and in the second the glass surface of the plate is outwards. Itis p
. Radiography and radio-therapeutics . its socket. The temporo-maxillaryarticulation of either side can be satisfactorily shown by centering the tubebehind and a little below the angle of the jaw on the more distant aspectfrom the plate. The most satisfactory method of showing injuries in theregion of the upper or lower jaw is undoubtedly the stereoscopic, the advan-tage being that by this method the parts may be viewed in the stereoscopefrom either side by changing the plates, in one position the film surfaceis outwards and in the second the glass surface of the plate is outwards. Itis possible to form an accurate opinion regarding the positions of the bones. Plate XV. Fig. b shows the chief bony points of the skull and face takenfrom the antero-posterior position. The plate was placed on the face, withthe focus tube behind. The orbits are well marked, and the nasal cavitiesshow a considerable amount of detail, which is of great value when onehas to consider the possibility of fracture in these regions. The antrum of. PLATE XVI.—NoHMAi. Skills. a, Skull showing several pieces of metal in face. The sella turcica is particularly well shown. b, Mid area of skull ; a line has been placed on points giving the radiographic base-line ; the lineruns through the base of the sella turcica (dry skull). c, Lateral view of skull in living subject; probes have been placed in the frontal and sphenoidal sinuses.
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