A scanning electron microscopic study of smear layer remaining following use of Greater Taper rotary instruments

Debridement Ability of TruNatomy, S-One Plus, and Other Single File Systems

BACKGROUND: Rotary nickel titanium instrument are an essential part of endodontic treatment, it is important to compare the root canal cleaning ability of these instruments. AIM: This study aimed to compare the amount of smear and debris layer remained following the use of four rotary instruments with an irrigant solution: TruNatomy (TRN), Protaper Next (PTN), S-One Plus and Wave One Gold (WOG). METHODS: A total of 80 extracted mandibular premolars were used and decoronated to the cemento-enamel junction. The roots were randomly divided into four groups of 20 specimens each. The roots were instrumented according to the manufacturer’s instructions of each file, the root canals were irrigated with sodium hypochlorite (NaOCl), Ethylene-diaminete-traacetic acid (EDTA) and Normal saline with each file use, two grooves were prepared on the buccal and lingual surfaces by disc to facilitate vertical splitting with a chisel. The presence of the smear layer and the debris layer were evaluated under Scanning Electron Microscope. RESULTS: Trunatomy remove the smear layer substantially better than PTN and S-one Plus. Wave one gold significantly removes smear layer better PTN. The amount of debris remained in TruNatomy group was significantly lower than other groups, all experimental files significantly removes the smear layer and debris layer better in the middle and coronal thirds compared to apical third. CONCLUSION: TruNatomy showed better cleaning capacity than all other experimental groups and all experimental groups demonstrated better cleanliness at the coronal and middle third of the roots.