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Efficient removal of 2,6-xylidine precipitate using different agitation protocols: An in vitro field emission
Bhavika B Shetty1, Sritejeswar Sripada1, Shruti Bhandary1
1Department of Conservative Dentistry and Endodontics, A. J. Institute of Dental Sciences, Mangalore, Dakshina Kannada, Karnataka, India.
Background:
Any solution of chemical nature when combined will result in the formation of a precipitate, which in the root canal system will interfere with the hermetic seal. In clinical practice presence of any precipitate, especially carcinogenic in nature, should be eliminated.
Aim:
To evaluate whether final irrigation with different agitation protocols will remove the precipitate formed following lidocaine hydrochloride and sodium hypochlorite combination at the coronal, middle, and apical-root thirds.
Materials And Methods:
Forty-four uniradicular teeth were standardized at 17 mm. All specimens were injected with 2% lidocaine hydrochloride and 2.5% sodium hypochlorite, followed by mechanical instrumentation using rotary files. Further, specimens were arbitrarily divided into four groups (n = 11) based on the final irrigation protocol: Group 1: No irrigation; Group 2: Manual irrigation; Group 3: Mechanical irrigation; Group 4: Ultrasonic irrigation. Samples were sectioned and Field Field Emission Scanning Electron Microscopic (FESEM) analysis of the canal wall was done at coronal, middle, and apical thirds.
Results:
FESEM images revealed occluded dentinal tubules with the presence of precipitate seen in all-thirds of each specimen.
Conclusion:
No irrigation protocol was successful in removing the precipitate formed; but when compared ultrasonic irrigation had the least precipitate seen at-coronal,-middle and apical thirds.
