Resumen:
Purpose: To assess the impact of an educational intervention to show dental students DHPs’ internal contamination using adenosine triphosphate (ATP) bioluminescence. Methods: A convenience sample study was carried out of undergraduate dental students, answered a confidential, self-administered questionnaire with closed-format questions on their perceptions and knowledge before and after an educational intervention presenting the results of ATP on DHPs. Results: The before and after questionnaire survey revealed a positive change in students perceptions on the importance of DHP reprocessing (100% response rate). Conclusion: This educational intervention using ATP, to demonstrate internal contamination, successfully changed dental students perceptions and knowledge on the importance of DHP reprocessing.