Which positioning error occurs if the maxillary arch is not parallel to the floor during bisecting?

The distortion of images arises when the maxillary arch is not parallel to the floor during the bisecting technique. This technique relies on properly angling the X-ray beam to achieve accurate results. If the maxillary arch is tilted, the angles of the X-ray beam and the film or sensor are compromised, leading to foreshortening or elongation of the tooth structures in the resulting radiographs. As a result, the anatomy may appear inaccurate, making diagnosis more challenging. Therefore, it's essential to position the patient correctly to ensure the maxillary arch is level, which helps achieve clear and correctly proportioned images.