The bisecting angle technique is used when the sensor cannot be placed parallel to the long axis of the tooth. The sensor is positioned at an angle behind the tooth in question. An imaginary line bisects the angle formed by the long axis of the tooth and the film.

When should the bisecting technique be used?

This technique is used in areas where the parallel technique is impossible due to poor access, making the angle between tooth and film more than 15 degrees. Using this technique, a true image of the tooth length and width is obtained.

What is the reason for using the bisecting angle?

Bisecting angle images are not anatomically accurate and are prone to shape distortion. However, the bisecting angle provides an alternative technique when parallel placement cannot be achieved or occlusal techniques are employed.