2021
DOI: 10.1111/iej.13521
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Micro‐computed tomographic assessment of dentinal microcrack formation in straight and curved root canals in extracted teeth prepared with hand, rotary and reciprocating instruments

Abstract: CM, Câmara AC. Micro-computed tomographic assessment of dentinal microcrack formation in straight and curved root canals in extracted teeth prepared with hand, rotary and reciprocating instruments. International

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Cited by 11 publications
(13 citation statements)
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“…Instrumentation of the lower molars revealed microcracks in 15% (ProTaper Universal for Hand Use), 16% (Hyflex EDM), and 17% (Reciproc Blue) of the cross-sections. Therefore, the preparation of straight and curved root canals with the ProTaper Universal for Hand Use, HyFlex EDM, and Reciproc Blue systems did not produce microcracks in extracted teeth when evaluated with micro-CT [30].…”
Section: Resultsmentioning
confidence: 87%
“…Instrumentation of the lower molars revealed microcracks in 15% (ProTaper Universal for Hand Use), 16% (Hyflex EDM), and 17% (Reciproc Blue) of the cross-sections. Therefore, the preparation of straight and curved root canals with the ProTaper Universal for Hand Use, HyFlex EDM, and Reciproc Blue systems did not produce microcracks in extracted teeth when evaluated with micro-CT [30].…”
Section: Resultsmentioning
confidence: 87%
“…At first, this unexpected outcome produced great criticisms from some research groups as it went against the prevailing mainstream. As time went by, however, the main findings of De-Deus et al (2014) were supported by other independent groups (Aksoy et al, 2019;Arumugam & Yew, 2021;Aydin et al, 2014;Bayram et al, 2017aBayram et al, , 2017bCassimiro et al, 2017;Martins et al, 2021;Miguéns-Vila et al, 2017;Rödig et al, 2019;Vieira et al, 2020). At this point, it is important to highlight that microcracks visualized in sound teeth cannot be referred to as 'pre-existing' microcracks considering that there are no 'post-existing' microcracks.…”
Section: Micro-ct Workflow: Obtaining Cross-sectional Images To Evalu...mentioning
confidence: 78%
“…By using extracted/stored teeth, as in the first sectioning studies, this method was further improved through an in situ approach employing fresh cadaveric bone blocks. The best scientific evidence provided so far by these studies are summarized in the following list and shall be taken as the main conclusions of this narrative review: Micro‐CT is an accurate method to visualize dentinal microcracks previously observed in root cross sections under microscopic‐based magnification and illumination (De‐Deus et al, 2016); Using extracted teeth, no new dentinal microcrack is created after canal preparation since observed cracks are already present pre‐operatively; therefore, there is a lack of cause–effect relationship between root canal preparation procedures and dentinal defects (Aksoy et al, 2019; Arumugam & Yew, 2021; Aydin et al, 2014; Bayram et al, 2017a, 2017b; Belladonna et al, 2021; Cassimiro et al, 2017; De‐Deus et al, 2014, 2015, 2016, 2017b, 2017c; Martins et al, 2021; Miguéns‐Vila et al, 2017, 2021; de Oliveira et al, 2017a, 2017b; Rödig et al, 2019; Vieira et al, 2020; Zuolo et al, 2017); The number of dentinal microcracks has no correlation with the force required to fracture extracted teeth (Cavalcante et al, 2020); No dentinal microcrack is observed in situ neither in the baseline images nor after root canal preparation in fresh cadaveric bone blocks, suggesting that microcracks observed in extracted/stored teeth are a laboratory phenomenon, not reproduced in a clinical environment (De‐Deus et al, 2017b, 2019). …”
Section: Final Remarksmentioning
confidence: 99%
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