Methods: Bitewing radiographies taken from patients with intra-dentinal carries, coming to radiology department of dental Azad university of Tehran. Patients were categorized into two groups, the first group had positive predictions of pulpal exposure & the other had negative predictions. After removing whole infected dentine, teeth pulpal exposure and without exposure were determined.
Results: According to the result of this study, the sensitivity & specificity of bite-wing radiography were 83% & 71%,respectively.
Conclusion: Bite-wing radiography can be more useful to diagnose the pulpal exposure in those with negative prediction rather than the positive predictions.
Key words: Bitewing radiography, Pulpal exposure.