A tooth with irreversible pulpitis fails to respond to the Endo Ice cold test. What does this result represent?

A false negative result occurs when a test is negative despite the condition being present. In this case: the tooth DOES have disease (pulpitis/positive for disease), but the cold test FAILED to detect it (gave a negative result). Therefore, the test result is falsely negative. This can occur in cases of calcified canals, thick dentin, or advanced pulp degeneration. A false positive would be a test that shows a positive response when no disease is present. Understanding diagnostic test accuracy (sensitivity, specificity, positive predictive value, negative predictive value) is fundamental to evidence-based dental practice.