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- W2346052092 abstract "Abstract Aim To compare the centring ability and transportation of ProTaper Next (PTN), ProTaper Universal (PTU), Race 123 and RevoS using micro‐computed tomography (μCT). Methodology Sixty mesial root canals of thirty mandibular molars were divided virtually into coronal, middle and apical thirds, and two reproducible reference points were marked on the external surface of the roots creating 360 measurement points. Samples were randomly allocated to four NiTi instrumentation techniques. Group 1: PTU up to F2 ( n = 16), group 2: PTN up to X2 ( n = 18), group 3: Race 123 up to T2 ( n = 12) and group 4: RevoS up to SU ( n = 14). To reproduce a clinical situation, samples were prepared on a phantom head using a surgical operating microscope. Samples were scanned pre‐ and postoperatively using μCT to compare and calculate the transportation and centring ratio. The data were analysed using parametric statistics. Results In the coronal and middle third of the root canals, there were significant differences in centring between PTN and PTU (coronal P < 0.001), PTN and RevoS (coronal P < 0.001), Race and PTU (coronal P < 0.01), Race and RevoS (coronal P < 0.01), PTN and RevoS (middle P < 0.01) and Race and RevoS ( P < 0.05). Furthermore, there were significant differences in centring between PTN root canal preparations and other instruments in the apical third (PTN and PTU P < 0.01, PTN and Race P < 0.001, PTN and RevoS P < 0.001). In terms of transportation, in the coronal third, there was a significant difference between PTN and PTU ( P < 0.05). However, there were no significant differences between the other instruments. In the middle third, significant differences were observed between PTN and PTU ( P < 0.05), PTN and RevoS ( P < 0.05), Race and PTU ( P < 0.05) and Race and RevoS ( P < 0.05). However, there were no significant differences between other systems. There was no significant difference in terms of transportation between the four systems in the apical third. Conclusions ProTaper Next prepared more centred root canal shapes when compared with Race, PTU and RevoS. In the coronal and middle third of the root canals, the differences in centring between PTN and PTU/RevoS were significant. PTN root canal preparations were more centred than those achieved with all other instruments in the apical third." @default.
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- W2346052092 date "2016-06-02" @default.
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- W2346052092 title "Comparison of centring ability and transportation between four nickel titanium instrumentation techniques by micro-computed tomography" @default.
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- W2346052092 doi "https://doi.org/10.1111/iej.12658" @default.
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