Disadvantage of bisecting-angle technique?

• A. Produces less distortion
• B. Distorts relationship to other structures
• C. Yields higher resolution
• D. Requires less equipment

Answer: (B)

Distortion of relationships to other structures is the key issue here. In the bisecting-angle technique, the film isn’t parallel to the tooth and the X-ray beam is directed along an angle that bisects the tooth–film gap. This geometry causes objects in the image to be magnified unevenly, so the spatial relationships between the tooth and adjacent teeth or structures aren’t depicted accurately. Because of that, the image can misrepresent how teeth and surrounding anatomy relate to each other, which is the main downside of this technique. It doesn’t inherently give higher resolution, and it isn’t known for requiring less equipment; those aren’t the defining drawbacks.