Question

Which of the following describes the proper direction of the central ray in the bisecting technique?

1) 90 degrees to the long axis of the tooth
2) 90 degrees to the receptor and long axis of the tooth
3) 90 degrees to the receptor
4) 90 degrees to the imaginary bisector

Answer 1

In the bisecting technique for dental radiography, the central ray should be directed at 90 degrees to the imaginary bisector of the angle formed by the tooth's long axis and the receptor's plane.

Step-by-step explanation:

The proper direction of the central ray in the bisecting technique is 90 degrees to the imaginary bisector. This technique is used in dental radiography for accurate imaging. When the X-ray film or digital sensor cannot be placed in parallel to the long axis of the tooth due to anatomical constraints, the central ray must be directed perpendicular to an imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the X-ray film or digital sensor. This ensures the produced image is as close to the tooth's actual size and shape as possible without distortion.