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Abstract The aim of the present study was to assess the effect of working length determination using apex locator in comparison to digital radiography on post-operative pain after endodontic instrumentation and obturation reflected as postoperative pain scores & the number of days needed for complete disappearance of pain, Also the number of analgesic tablets needed to be taken by patients with Asymptomatic irreversible pulpitis due to carious exposures or normal pulp treated for prosthetic reasons. |