Electric pulp testing is least effective in which of the following scenarios?

Electric pulp testing is a diagnostic tool used to evaluate the health of the dental pulp by determining its vitality. The effectiveness of this method can vary depending on the condition of the tooth being tested.

In the case of multi-rooted teeth, electric pulp testing can be less effective due to the complexity and variability of the pulp anatomy. Multi-rooted teeth often have several canals, and the pulp tissue in each canal can respond differently to electric stimuli. Additionally, if one root is affected and another is not, the test may not give an accurate reflection of the overall pulp status. Therefore, when testing a multi-rooted tooth, there is a higher chance of discrepancies in the results, making it difficult to ascertain the vitality of the pulp comprehensively.

In contrast, while traumatized teeth, just erupted teeth, and capped teeth can also present challenges during testing, the effects on pulp vitality are generally more straightforward to assess than in multi-rooted teeth. Traumatized teeth might still show a response due to the remaining viable pulp tissue, newly erupted teeth may have reduced sensitivity but are usually easier to evaluate than more complex multi-rooted structures, and capped teeth have had their pulps exposed to a level of treatment that still allows them to be responsive, despite potential