Fig. (6) Cone-beam computed tomography scan (axial view) of cervical third of mesiobuccal root canals. A – before preparation. B – after preparation. PTN - ProTaper Next®; PTG - ProTaper Gold®; MT - Mtwo®; BR - BioRaCe®; WOG - WaveOne Gold®; REC - Reciproc®; MB – mesiobuccal canal.

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