. Interpretation of dental and maxillary roentgenograms . Fig. 26.—Diagram showing position for exposing sinus plate, and projection oftlie sinuses on the plate. witnessed the examination to determine which teeth aredepicted in a given plate or film? Plates.—In exposing a plate, it is recalled that theside of the face to be slioAvn is laid against the emulsion 60 IjSTTEEPPvETATIOX of EOENTGEiSrOGPiAMS surface and the rays directed from the opposite side of thehead. Therefore, a finished plate of the riglit side, withthe emulsion surface toward the observer, should looktoward the left, while a
. Interpretation of dental and maxillary roentgenograms . Fig. 26.—Diagram showing position for exposing sinus plate, and projection oftlie sinuses on the plate. witnessed the examination to determine which teeth aredepicted in a given plate or film? Plates.—In exposing a plate, it is recalled that theside of the face to be slioAvn is laid against the emulsion 60 IjSTTEEPPvETATIOX of EOENTGEiSrOGPiAMS surface and the rays directed from the opposite side of thehead. Therefore, a finished plate of the riglit side, withthe emulsion surface toward the observer, should looktoward the left, while a plate of the Jeff side should looktoward the right. Films.—In making a film, it is placed in the mouthwith the emulsion surface toward the inner or lingualaspect of the teeth, and the rays directed from the sameside of the head. A finished film should be viewed with. Fig. 27.—Opacity due to empyema of left maxillary sinus. the shiny surface toward the observer. In the case ofthe anterior teeth, the uppers and lowers are distin-guished by their size and shape. The teeth on the rightside will be to the right of the film, and the left to theleft. Films of upper posterior teeth are frequently dis-tinguished by showing outlines of the maxillary sinus,while in lower films, the occlusal line of the teeth isgenerally concave, and the mandibular canal and mentalforamen may be slioA\m. The upper and lower molars are CORRELATION OF CLINICAL FUsTDINGS 61 also distingnislied by the number of their roots. Withan upper fihn held with the roots of the teeth pointing-upward, and a lower film with the roots pointing down,shin}^ side of film toward the observer, the hindermostteeth of a film of the right side will be toward the riglitof the film, and the hindermost teeth of a film of the leftside will be to the left of the film. This explanation isdifficult to giv
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectradiographydental
