VATECH EzRay Air Wall Manuel D'utilisation page 29

Here are the specific angulations and directions for the tube head in order to take the
best images of a particular tooth (i.e. Bisected angle technique).
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Maxillary Incisor
X-ray beam is directed downward at 45°.
EzRay Air Wall (VEX-S300W) User Manual
Position the receptor carefully not to damage the soft tissue of the
patient's intra-oral area.
Teeth
Incisor
Angle of inclination
Maxilla
3. Operation
+45˚
21