What is The main cause of errors in bisected-angle films and extraoral film techniques?

The main cause of errors in bisected-angle films and extraoral film techniques often stems from improper positioning of the film or the X-ray beam. In bisected-angle techniques, inaccuracies can arise from the incorrect alignment of the film with the long axis of the tooth, leading to distortion or overlapping images. For extraoral films, errors may occur due to inadequate patient positioning or failure to center the X-ray beam properly, resulting in poor image quality or loss of critical anatomical details. Additionally, factors like patient movement and improper exposure settings can further contribute to inaccuracies in both techniques.