What is the deciduous predecessor of tooth 24, which has a class II cavity?

What is the deciduous predecessor of tooth 24, which has a class II cavity?

• A. Upper left deciduous first molar
• B. Lower left deciduous first molar
• C. Upper right deciduous first molar
• D. Lower right deciduous first molar

Answer: (A)

Tooth number 24 refers to the upper left permanent first premolar in the FDI dental notation system. The deciduous predecessor of a permanent tooth is the primary tooth that it replaces. In this case, the permanent upper left first premolar erupts from around the age of 10 to 12 years and replaces the upper left primary first molar. The primary teeth are designated differently than permanent teeth, typically using letters instead of numbers. The upper left deciduous first molar is the baby tooth that is located in the same position as the upper left permanent first premolar. Thus, recognizing the relationship between the primary and permanent dentition is essential in understanding tooth succession. The other options are located in different quadrants of the mouth, meaning they do not serve as predecessors for tooth number 24. Each of these options represents either a different tooth type (permanent molar versus deciduous) or a tooth in a different region (lower left, upper right, or lower right), which are not pertinent to the dental development of tooth 24.

Tooth number 24 refers to the upper left permanent first premolar in the FDI dental notation system. The deciduous predecessor of a permanent tooth is the primary tooth that it replaces. In this case, the permanent upper left first premolar erupts from around the age of 10 to 12 years and replaces the upper left primary first molar.

The primary teeth are designated differently than permanent teeth, typically using letters instead of numbers. The upper left deciduous first molar is the baby tooth that is located in the same position as the upper left permanent first premolar. Thus, recognizing the relationship between the primary and permanent dentition is essential in understanding tooth succession.

The other options are located in different quadrants of the mouth, meaning they do not serve as predecessors for tooth number 24. Each of these options represents either a different tooth type (permanent molar versus deciduous) or a tooth in a different region (lower left, upper right, or lower right), which are not pertinent to the dental development of tooth 24.