Because of the supporting structures on the maxillary arch, to accomplish a parallel relationship between the image receptor and the long axes of teeth, the image receptor must be placed closer to the teeth.

Question

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In dental radiography, especially for the maxillary arch, the image receptor is often placed away from the teeth and toward the middle of the oral cavity to achieve parallelism with the long axes of the teeth, due to anatomical constraints and the need to avoid superimposition of structures.

Because of the Supporting Structures on the Maxillary Arch, to Accomplish