What is the FDI notation for the lower left second premolar?

The FDI notation system, also known as the ISO system, designates specific teeth using a two-digit code. The first digit indicates the quadrant, while the second digit identifies the specific tooth within that quadrant. In this system, teeth are numbered based on their position in the mouth.

For the lower left quadrant, which includes teeth from 31 to 38, the first digit is 3. The second digit indicates the tooth's position among the premolars and molars. In this case, the second premolar in the lower left quadrant is designated by the number 5, leading to the designation of 35.

Therefore, the correct FDI notation for the lower left second premolar is indeed 35, as it correctly identifies both the quadrant and the specific tooth. The other numbers represent different teeth or quadrants in the mouth, confirming the precision of the FDI system in identifying dental structures.