In Vitro assessment of interaction between lidocaine hydrochloride and irrigating solutions on root canal dentin: A scanning electron microscope study

Aim: To investigate the precipitate formed from interaction between 2% lidocaine hydrochloride with adrenaline (LA) 2.5% sodium hypochlorite (NaOCl) and 0.2% chitosan nanoparticles on root canal dentin, using scanning electron microscopy (SEM). Material Methods: Sixty mandibular premolars were decoronated, length standardised. The specimens randomly distributed into following groups: Group 1 (control): LA mixed sterile water without instrumentation, 2: NaOCl in 3: instrumentation. Teeth split subjected to SEM analysis at cervical, middle, apical thirds. On observing formation 2, 10 decoronated treated Results: 3 showed patent dentinal tubules no formation. 2 blocking all three sections, could not be removed completely after cleaning shaping. Conclusion: forms an insoluble local anaesthetic solution that cannot chemo-mechanical preparation. Chitosan do form any such show tubules. Hence, can used as a flushing irrigant.