What issue arises when the occlusal plane on a panoramic radiograph appears flat?

When the occlusal plane on a panoramic radiograph appears flat, it typically indicates that the patient's chin is positioned too high during the imaging process. The panoramic radiograph is designed to provide a broad view of the dental arches, allowing for proper alignment of the occlusal plane. When the chin is elevated excessively, the resulting image depicts a flat occlusal plane, which can lead to misinterpretation of the dental structures and occlusion.

In an optimal position, the occlusal plane should have a slight curve or tilt that reflects the natural arch of the teeth. A flat appearance suggests that the positioning has deviated from this alignment, making it essential to ensure proper chin placement during future imaging sessions. Proper positioning is vital for accurate diagnosis and interpretation, as positioning errors can lead to misdiagnosis or inappropriate treatment planning.