“…Their separation may affect the outcome of treatment, as a retained instrument will likely prevent the three-dimensional obturation (Altundasar et al, 2008). Several methods such as bacterial leakage (Mohammadi & Khademi, 2006;Saunders et al, 2004), dye extraction (Rangappa et al, 2013), fluid filtration (Altundasar et al, 2008), and cone-beam computed tomography (Nagaveni et al, 2017;Singh et al, 2015) have been introduced to evaluate the quality of root canal obturation. Recently, micro-CT has been preferred widely for this purpose (Başer Can et al, 2017;Endal et al, 2018;Huang et al, 2017;Iglecias et al, 2017;Keleş & Keskin, 2020;Kucukkaya Eren et al, 2019;Oh et al, 2016;Somma et al, 2011).…”