When using parallax in the horizontal plane, a buccally positioned unerupted tooth will appear to move in which direction relative to the x-ray tubehead?

When using parallax in the horizontal plane, the principle of parallax relies on viewing an object from two different angles to determine its position relative to a fixed point, such as the x-ray tubehead. When a buccally positioned unerupted tooth is imaged from two different angles, it will appear to shift position.

If the x-ray tubehead is moved to the right while maintaining the film or sensor's position, any structure that is located buccally (towards the inner cheek) will appear to move in the same direction as the tubehead. This occurs because the buccal position places the tooth closer to the x-ray beam's path when viewed from the right-hand angle, resulting in the perceived movement of that tooth appearing to correspond with the direction of the tubehead.

Thus, for a buccally positioned tooth, the correct response regarding its apparent movement when the tubehead is shifted is that the tooth will appear to move in the same direction as the x-ray tubehead, confirming the correct choice.