2019
DOI: 10.1111/iej.13247
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Evaluation of dentine thickness of middle mesial canals of mandibular molars prepared with rotary instruments: a micro‐CT study

Abstract: Aim To evaluate, using micro‐CT, the remaining dentine thickness after preparation of the mesiobuccal (MB), mesiolingual (ML) and middle mesial (MM) canals of mandibular first molars with the ProTaper Next rotary system. Methodology Eleven mesial roots of mandibular first molars having three independent canals from the furcation level up to at least 5 mm towards the apical direction were selected. Preparation of MM canals was performed in two steps using ProTaper Next X2 (step 1) and X3 (step 2) instruments, w… Show more

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Cited by 22 publications
(17 citation statements)
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“…This result cannot be compared to the previous studies, where bi-dimensional methods of analysis, as radiographic analysis, and scanning electron microscopy analysis were used (Ormiga et al 2015, Kowalczuck et al 2019. Micro-CT analysis has been used extensively in endodontic studies because it is a non-invasive method that enables comparison between three-dimensional parameters before and after the endodontic procedures (Nielsen et al 1995, De-Deus et al 2014, Belladonna et al 2018, Keles et al 2020, Yang et al 2020. In the present study, the fragment volume was measured before and after the dissolution process, where the control group was composed of teeth containing the fragments before the dissolution.…”
Section: Discussionmentioning
confidence: 95%
“…This result cannot be compared to the previous studies, where bi-dimensional methods of analysis, as radiographic analysis, and scanning electron microscopy analysis were used (Ormiga et al 2015, Kowalczuck et al 2019. Micro-CT analysis has been used extensively in endodontic studies because it is a non-invasive method that enables comparison between three-dimensional parameters before and after the endodontic procedures (Nielsen et al 1995, De-Deus et al 2014, Belladonna et al 2018, Keles et al 2020, Yang et al 2020. In the present study, the fragment volume was measured before and after the dissolution process, where the control group was composed of teeth containing the fragments before the dissolution.…”
Section: Discussionmentioning
confidence: 95%
“…For example, Bryant et al [31] reported that the mean size of the danger zone for 200 canals used was 0.79 mm. Keles et al [32] reported that the thinnest canal walls of MB canals were 1.16 ± 0.20 mm and ML canals were 1.19 ± 0.18 mm. De-Deus et al [33] found that the danger zone values in the MB canals varied from 0.67 to 1.93 mm with an average of 1.13 ± 0.21 mm, and in the ML canals varied from 0.77 to 1.89 mm with an average of 1.10 ± 0.21 mm, locating up to 4 mm under the furcation area.…”
Section: Discussionmentioning
confidence: 99%
“…For example, Bryant et al [31] reported that the mean size of the danger zone for 200 canals used was 0.79 mm. Keles et al [32] reported that the thinnest canal walls of MB canals In the present study, the minimal distal dentine thicknesses associated with the MB and ML canals below the furcation 1, 2, 3, 4, 5 mm of Chinese population were measured. The results showed that the minimal distal dentine thicknesses of MB and ML canals are located 3∼4 mm below the furcation for both men and women, with a mean range of 0.78∼0.80 mm, and there are no differences between MB and ML canals.…”
Section: Discussionmentioning
confidence: 52%