The dental caries index is an example of which index?

The dental caries index is an example of which index?

• A. Simple index
• B. Cumulative index
• C. Irreversible index
• D. Global index

Answer: (C)

In dental epidemiology, the important distinction is whether a measure records permanent outcomes. The dental caries index tracks lifetime caries experience by counting teeth that are decayed, missing due to caries, or filled. Once a tooth is counted, that history is not erased—even if decay is arrested or a restoration is placed—the record remains and the total can only stay the same or increase. That permanence makes it an irreversible index. It isn’t just about whether caries is present at a moment in time (that would be a simple, reversible view), and it isn’t a global summary for a population. The defining feature here is that past caries experiences are carried forward and not removed from the measure.

In dental epidemiology, the important distinction is whether a measure records permanent outcomes. The dental caries index tracks lifetime caries experience by counting teeth that are decayed, missing due to caries, or filled. Once a tooth is counted, that history is not erased—even if decay is arrested or a restoration is placed—the record remains and the total can only stay the same or increase. That permanence makes it an irreversible index. It isn’t just about whether caries is present at a moment in time (that would be a simple, reversible view), and it isn’t a global summary for a population. The defining feature here is that past caries experiences are carried forward and not removed from the measure.