Two periapical radiographs of an unerupted maxillary canine are made, the second with the tube shifted mesially. The canine appears to move mesially relative to the incisor roots. Where is the canine located?
- Correct answer
Palatal to the incisor roots
-
Buccal to the incisor roots
-
In the same plane as the incisor roots
-
Its position cannot be determined by tube shift
This question is one of 15 in AFK practice: Oral medicine, pathology and radiology. Test yourself on all of them.
Practice quiz FlashcardsExplanations
By the buccal object rule (same lingual, opposite buccal), an object that moves in the same direction as the tube shift lies lingual or palatal to the reference object. A buccally positioned object would move in the opposite direction.
Source: White and Pharoah's Oral Radiology — oneguy
Log in to add an explanation.
Advertisement