| 摘要 |
A device (1) for holding X-ray film (2) during the taking of radiographs of patients' teeth with X-rays emanating from a cone (13) of an X-ray source has a bite wing (3) extending in a horizontal center plane perpendicularly to an X-ray film plane, for retention of the device by patients' teeth. An X-ray film holder is carried by the bite wing for retaining X-ray film centered relative to the horizontal center plane and alternatively vertically offset from that horizontal center plane. A guide rod (5) is connected laterally to the bite wing and extends in the horizontal center plane perpendicularly away from the X-ray plane, for guidance of X-ray cone. An aiming rod (7) extends in a vertical center plane of the centered and the vertically offset X-ray film. A transverse rod (6) extends in the horizontal center plane from the guide rod to the aiming rod, for mounting that aiming rod (7) at a distance from the bite wing. The aiming rod (7) is equipped for an aiming of the X-ray cone at an intersection of the horizontal and vertical center planes on the centrally retained X-ray film in the taking of radiographs of at least the crowns of upper and lower teeth (FIG. 4). The aiming rod (7) is also equipped for an aiming of the X-ray cone at an intersection of horizontal and vertical center lines of the vertically offset X-ray film in the taking of radiographs of root portions of the teeth (FIGS. 2 and 3). |
