Question
In which of the following positions can the sesamoid bones of the root be demonstrated to be free of superimposition with the metatarsals or phalanges
| A. |
Dorsoplantar metatarsals/toes
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| B. |
angential metatarsals/toes
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| C. |
30-degree medial oblique root
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| D. |
30-degree lateral oblique root
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Show Answer
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Correct Answer � B
Explanation
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Answer (B)
The tangential projection projects the sesamoid bones separate from adjacent structures. The patient is best examined in the prone position because this places the parts of interest closest to the IR. The affected root is dorsiflexed so as to place its plantar surface 15 to 20 degrees with the vertical. The CR is directed perpendicular to the posterior surface o the foot (near the metatarsophalangeal joints). The dorsoplantar and oblique projections of the root will demonstrate the sesamoid bones superimposed on adjacent bony structures.
