Which vitality tests are commonly used in endodontics, and what limitation can affect the results?

• A. Pulp capping test, thermal conductivity test, and color staining; results are unaffected by calcifications
• B. Cold test, heat test, and electric pulp test; results can be inconclusive in immature teeth or recently traumatized teeth and in necrotic teeth with calcifications
• C. Percussion test, palpation, and periodontal probing; results are always definitive
• D. Cone-beam CT, digital radiography, and MRI; results depend on exposure

Answer: (B)

Vitality testing in endodontics relies on eliciting a sensory response from the pulp to determine if it’s still live. The commonly used tests are the cold test, the heat test, and the electric pulp test. They assess nerve activity in the pulp, so a vital pulp usually responds to at least one stimulus, while a nonvital pulp typically does not respond.

However, results can be limited. In immature teeth or teeth that have been recently traumatised, the pulp’s nerve fibers may be underdeveloped or temporarily non-responsive, so responses can be absent or inconclusive even if the pulp is alive. In teeth with canal calcifications, conduction of the stimulus can be hindered, making tests inconclusive or misleading. Interpreting these tests alongside clinical findings and, if needed, re-testing or using additional assessments is important.