On which tooth number is the star located in the third example?

On which tooth number is the star located in the third example?

• A. 11
• B. 9
• C. 24
• D. 14

Answer: (C)

In this context, tooth numbers follow the universal numbering system. You start with the upper right third molar as 1 and move across the top row to the upper left third molar as 16. Then you continue on the bottom row from the lower left third molar as 17 to the lower right third molar as 32. The star in the third example sits on a front tooth on the lower left side—the lower left central incisor. In this system that tooth is numbered 24. Therefore, 24 is the correct tooth. For reference, 11 is the upper left canine, 9 is the upper left central incisor, and 14 is the upper left first molar, which are not where the star is located.

In this context, tooth numbers follow the universal numbering system. You start with the upper right third molar as 1 and move across the top row to the upper left third molar as 16. Then you continue on the bottom row from the lower left third molar as 17 to the lower right third molar as 32. The star in the third example sits on a front tooth on the lower left side—the lower left central incisor. In this system that tooth is numbered 24. Therefore, 24 is the correct tooth. For reference, 11 is the upper left canine, 9 is the upper left central incisor, and 14 is the upper left first molar, which are not where the star is located.