Paralleling Technique Advantage — NDEB AFK MCQ

Correct answer: E — Greater geometric accuracy with less distortion

The paralleling technique produces geometrically accurate images with minimal distortion because the image receptor is placed parallel to the long axis of the tooth and the X-ray beam is directed perpendicular to both. This eliminates the elongation or foreshortening artifacts inherent in the bisecting angle technique. It also provides more reproducible images for longitudinal comparison. The bisecting technique is occasionally used when anatomy prevents parallel placement (shallow palate, torus, gagging).

Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019