The bite block is used to position the arches correctly in the forward-backward dimension of the focal trough.

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The bite block is a dental appliance used during radiographic procedures to position the teeth and jaws correctly in the vertical dimension. It helps the patient maintain a constant and reproducible occlusal relationship between their upper and lower teeth, which in turn helps ensure that the image is properly focused and that there is minimal distortion. While the bite block can help to some extent with positioning in the forward-backward dimension, its primary purpose is to control the vertical position of the teeth and jaws.

The Bite Block Is Used to Position the Arches Correctly