What tooth number is the upper left second bicuspid?

What tooth number is the upper left second bicuspid?

• A. 13
• B. 12
• C. 14
• D. 23

Answer: (A)

The idea being tested is how to identify a specific tooth using the universal numbering system. In this system, the upper left quadrant is numbered from 9 to 16, starting with the central incisor and moving toward the back. The order in that quadrant is: central incisor, lateral incisor, canine, first premolar, second premolar, first molar, second molar, third molar. The second premolar (second bicuspid) in the upper left is the one after the first premolar, which corresponds to the number 13. So the upper left second bicuspid is tooth number 13. The other options would refer to different teeth in that quadrant or to teeth in other quadrants, not the upper left second premolar.

The idea being tested is how to identify a specific tooth using the universal numbering system. In this system, the upper left quadrant is numbered from 9 to 16, starting with the central incisor and moving toward the back. The order in that quadrant is: central incisor, lateral incisor, canine, first premolar, second premolar, first molar, second molar, third molar. The second premolar (second bicuspid) in the upper left is the one after the first premolar, which corresponds to the number 13. So the upper left second bicuspid is tooth number 13. The other options would refer to different teeth in that quadrant or to teeth in other quadrants, not the upper left second premolar.