The Incidence of Root Microcracks Caused by 3 Different Single-file Systems versus the ProTaper System

Li, Rui; Hou, Benxiang; Wesselink, Paul R.; Wu, Min-Kai; Shemesh, Hagay

doi:10.1016/j.joen.2013.04.013

Cited by 204 publications

(252 citation statements)

References 24 publications

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“…However, the micro-CT technology provides the possibility to examine the dentinal tissue before the root canal preparation, which is indeed a very suitable and important feature. The absence of new dentinal defects found after canal preparation with PTU system in the current study markedly contrasts with the results of previous studies, which showed that rotary canal preparation with this system could initiate and/or propagate dentinal micro-cracks (3,4,6,8,9,22). Bier and colleagues (4) observed cracks in 16% of horizontal sections of the roots instrumented with PTU system.…”

Section: Dentinal Defects and Root Canal Preparationcontrasting

confidence: 99%

“…This methodology exempts the need of cutting the specimens and allows comparison of the same sample before and after instrumentation. These are the most important methodological differences regarding previous studies (4,6,8,9). The reliability of this technology to detect dentinal defects was confirmed herein, once the full extension of dentinal micro-cracks visualized under conventional stereomicroscopy was identified in the micro-CT crosssectional images.…”

Section: Discussionsupporting

confidence: 57%

“…Burklein et al (9) found that the full-sequence of PTU files caused significant complete (n = 3; 5%) and incomplete (n = 20; 23.3%) cracks in mandibular incisors. Likewise, Liu et al (8) observed cracks at the apical root surface in 25% of the roots instrumented with PTU system. In the control group of the present study, in which only samples with previously prepared root canals were analyzed and the same sawing method as the above quoted studies was used, a higher percentage of micro-cracks formation (16.25%) was also observed.…”

Section: Dentinal Defects and Root Canal Preparationmentioning

confidence: 90%

“…Published studies on this topic always embrace cutting procedures and postoperative observation through optical microscopy technique. Under this methodological approach, it has been stated that NiTi rotary preparation per se might have an etiological role in the creation of dentinal defects (4)(5)(6)(7)(8)(9). Although these studies seem experimentally sound at first sight, as most of control groups using non-prepared teeth showed, in most cases, no dentinal defects, the destructive approach of the method stands for its major drawback, since the preoperative condition of the dentin is unknown.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

et al. 2016

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This study aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Universal (PTU) system and dentinal defects formation using micro-computed tomography (micro-CT) analysis. Forty mesial canals of mandibular molars with a type II Vertucci's canal configuration were scanned at an isotropic resolution of 14.16 µm. The sample was assigned to an experimental (n = 30) and a control (n = 10) groups, and the mesial canals were prepared with PTU system up to F2 instrument. The specimens from the experimental group were scanned and the cross-section images of the mesial roots, before and after preparation, were screened to identify the presence of dentinal defects. In the control group, the specimens were sectioned perpendicularly to the long axis of the root into 1-mm-thick slices (n = 80) and examined under optical microscope. Once a dentinal defect was detected, the slice was scanned through micro-CT. In the experimental group, dentinal micro-cracks were observed in 4,828 slices (24.04%). In all cross-section images, dentinal defects identified in the postoperative images were already present in the corresponding preoperative image. In the control group, 13 out of 80 slices (16.25%) had at least one dentinal defect visualized under stereomicroscopy, which was identified after a further micro-CT scanning. Micro-CT showed reliability as similar as optical microscopy in detecting dentinal defects, adding the possibility of tracking the dentinal tissue, before and after canal preparation, and providing a clear visualization of micro-cracks. Root canal preparation with PTU system did not induce the formation of new dentinal defects.

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Section: Dentinal Defects and Root Canal Preparationcontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 57%

Section: Dentinal Defects and Root Canal Preparationmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

et al. 2016

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“…The reciprocating movement of the instrument reduces the risk of cyclic fatigue. 11,12 In contrast, OneShape files employ traditional continuous rotation. They have a triangle-shaped cutting edge and two additional cutting edges, in the apical and coronal parts, as well as a crosssection that progressively changes from 3 to 2 cutting edges between the apical and coronal parts.…”

Section: Introductionmentioning

confidence: 99%

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

et al. 2014

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The aim of this study was to evaluate the preparation time and the amounts of apically extruded debris and irrigant using different nickeltitanium instrumentation systems. Forty-five extracted single-rooted mandibular premolar teeth were selected and divided into three groups. The root canals were instrumented according to the manufacturers' instructions, using a reciprocating single-file system, a single-file rotary system and a multiple-file rotary system. Bidistilled water was used as the irrigant solution. The apically extruded debris and irrigant were collected into preweighed Eppendorf tubes. The amounts of extruded debris and irrigant were assessed with a precision micro-balance. The Eppendorf tubes were incubated at 37°C for 15 days. After the incubation period, they were weighed again to assess the debris extrusion. The time required to prepare the canals was also recorded. The results were statistically analyzed using MANOVA and Bonferroni's adjustment. Considering the apically extruded debris and irrigant, there were no statistically significant differences among the groups (p > 0.05). The Reciproc group produced the highest debris (0.000632 ± 0.000162 gr) and irrigant (0.844587 ± 0.437814 ml) extrusion values. While the least extruded debris was observed with OneShape (0,000431 ± 0,000171 gr), the least extruded irrigant was observed with ProTaper system (0.564147 ± 0.370596 ml). Instrumentation was faster using the Reciproc than the other two instruments (70.27 ± 13.38 s) (p < 0.05). All of the instrumentation systems used in this study produced apical debris and irrigant extrusion. The reciprocating single-file system tended to produce more debris and irrigant extrusion, compared with the rotary systems. Considering the preparation time, the single-file systems appeared to be advantageous due to their working time.

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Effect of Reciproc blue, XP‐endo shaper, and WaveOne gold instruments on dentinal microcrack formation: A micro‐computed tomographic evaluation

Aydın

Keskin

Özyürek

2019

Microscopy Res & Technique

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The purpose of this study was to evaluate and compare the effect of Reciproc Blue (RPCB), XP‐endo Shaper (XPS), and WaveOne Gold (WOG) single‐files on dentinal microcrack formation using micro‐computed tomography (micro‐CT). Twenty‐four mesial roots (24 mesio‐buccal and 24 mesio‐lingual canals) of mandibular molar teeth were prepared using RPCB, XPS, and WOG files (n = 8/each group). The samples were scanned with micro‐CT in the pre‐ and post‐preparation. Then, before preparation and after preparation cross‐sectional images of the teeth were evaluated to detect the presence of microcracks. For each group, the number of microcracks was calculated as a percentage rate. The data were statistically analyzed using McNemar at 5% significance level (p < .05). Dentinal microcracks were observed in 25.99% (2,103 of 7,813), 31.99% (2,482 of 7,758), and 36.66% (2,836 of 7,731) of cross‐sectional images of the XPS, WOG, and RPCB groups, respectively. In all the groups, all the dentinal microcracks seen in the post‐treatment cross‐sectional images were present in the corresponding pre‐treatment images. Within the limitations of this study, the XPS, WOG, and RPCB files did not cause new dentinal microcrack formation or propagation of existing dentinal microcracks.

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The Incidence of Root Microcracks Caused by 3 Different Single-file Systems versus the ProTaper System

Cited by 204 publications

References 24 publications

On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

Assessment of apically extruded debris and irrigant produced by different nickel-titanium instrument systems

Effect of Reciproc blue, XP‐endo shaper, and WaveOne gold instruments on dentinal microcrack formation: A micro‐computed tomographic evaluation

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