Micro-CT evaluation of the effectiveness of the combined use of rotary and hand instrumentation in removal of Resilon

Asheibi, Fatma; Qualtrough, A. J. E.; Mellor, A C; Withers, Philip J.; Lowe, Tristan

doi:10.4012/dmj.2013-149

Cited by 13 publications

(12 citation statements)

References 29 publications

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“…AH Plus is an epoxy resin‐based endodontic sealer recommended by several researchers because it has biological, physical, and chemical superiorities among all sealers (Mutoh et al ., ; Üstün et al ., ; Asheibi et al ., ). During root canal obturation, uncured AH Plus residues may remain on access cavity walls, especially over the dentinal surface, due to its anatomically complex structure (Kuga et al ., ).…”

Section: Discussionmentioning

confidence: 97%

The bond strength of adhesive resins to AH plus contaminated dentin cleaned by various gutta-percha solvents

et al. 2015

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The optimal bonding of adhesives to dentin requires the sealer to be completely removed from dentinal walls. The aim of this study was to investigate the effect of different cleaning procedures using gutta-percha solvents on bond strength of adhesive resins to AH Plus contaminated dentin (APCD). The pulp chamber dentin surfaces were contaminated with AH Plus and cleaned with five different techniques (dry cotton, chloroform, orange oil, eucalyptol, and ethanol). Then, Clearfil SE Bond (CSE) (Kuraray), and Tetric N Bond (TNB) (Ivoclar Vivadent) were applied and filled with a composite resin. The serial sticks (1 × 1 mm) were obtained and tested for microtensile bond strength. Scanning electron microscopy (SEM) was used for analysis of debonded surfaces. Ethanol exhibited the highest bond strength to APCD followed by dry cotton. There was no statistically significant difference between ethanol and dry cotton (p > 0.05). Eucalyptol showed the lowest bond strength to APCD and statistically significant differences (p < 0.05) in comparison with other groups. APCD reduced the bond strength of all adhesive resins. Dry cotton, ethanol, and chloroform were the most suitable techniques when used with CSE together, whereas ethanol was best with TNB.

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Section: Discussionmentioning

confidence: 97%

The bond strength of adhesive resins to AH plus contaminated dentin cleaned by various gutta-percha solvents

et al. 2015

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“…From a biological standpoint, void formations may act as a way for microorganisms to pass from the coronal to the peri-apical area. 27 Closed voids that are not linked to the dentin and post surface, could be considered to be clinically less significant than open voids. The open voids that are in continuity along both interfaces of the post may necessitate retreatment.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, it may cause easier dissolution of the resin cement and dislodgement of the post-core restoration under functional stresses. 27 28 Maccari et al 29 and Barcellos et al 30 showed that the main failure of teeth restored with fiber posts originated from fracturing of the coronal reconstruction. It is important to consider the role that wide and voluminous void formations that are localized at the coronal third play in post-core success.…”

Section: Discussionmentioning

confidence: 99%

3D micro-CT analysis of void formations and push-out bonding strength of resin cements used for fiber post cementation

et al. 2016

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PURPOSETo investigate the void parameters within the resin cements used for fiber post cementation by micro-CT (µCT) and regional push-out bonding strength.MATERIALS AND METHODSTwenty-one, single and round shaped roots were enlarged with a low-speed drill following by endodontic treatment. The roots were divided into three groups (n=7) and fiber posts were cemented with Maxcem Elite, Multilink N and Superbond C&B resin cements. Specimens were scanned using µCT scanner at resolution of 13.7 µm. The number, area, and volume of voids between dentin and post were evaluated. A method of analysis based on the post segmentation was used, and coronal, middle and apical thirds considered separately. After the µCT analysis, roots were embedded in epoxy resin and sectioned into 2 mm thick slices (63 sections in total). Push-out testing was performed with universal testing device at 0.5 mm/min cross-head speed. Data were analyzed with Kruskal–Wallis and Mann–Whitney U tests (α=.05).RESULTSOverall, significant differences between the resin cements and the post level were observed in the void number, area, and volume (P<.05). Super-Bond C&B showed the most void formation (44.86 ± 22.71). Multilink N showed the least void surface (3.51 ± 2.24 mm2) and volume (0.01 ± 0.01 mm3). Regional push-out bond strength of the cements was not different (P>.05).CONCLUSIONµCT proved to be a powerful non-destructive 3D analysis tool for visualizing the void parameters. Multilink N had the lowest void parameters. When efficiency of all cements was evaluated, direct relationship between the post region and push-out bonding strength was not observed.

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“…In the present study, the longitudinal sectioning method was preferred because it enables a direct examination of the samples. Thus, it is easier to determine root canal obturation materials using the sectioning method than using radiographic techniques; also, it is less costly (20). The radiological method provides 2D images of the 3D structure; magnification and distortions are likely to occur in the image, potentially increasing the possibility of inaccurate results (21).…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Effectiveness of Different Techniques for Supportive Removal of Root Canal Filling Material

Özyürek¹,

Demiryürek²

2017

Eur Endod J

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Objective:To compare the cleanliness of oval cross-sectioned root canals after using different supportive techniques for removal of root canal filling material as part of retreatment process. Methods: One hundred mandibular canine teeth with flat oval cross-sectioned canals were instrumented up to #40.06 and obturated using the warm vertical compaction technique. Removal of the gutta-percha and sealer was performed using the D-RaCe nickel-titanium retreatment instruments. The roots were randomly divided into four groups of 25 teeth, and the activation processes were applied: XP-endo Finisher (XP), EndoActivator (EA) and IrrıSafe (IS). Conventional needle irrigation (CI) was used as the control group. The teeth were sectioned, and digital images were captured. The photographs were analysed using AutoCAD software regarding the area of residual root filling. Kruskal-Wallis and post hoc Dunn's tests were performed for statistical analysis. Results: There was significantly less gutta-percha and sealer remnant in the XP group than in the other groups (P<0.05). The CI group contained significantly more gutta-percha and sealer remnant than the other groups (P<0.05). The apical third of the CI group had significantly more residual gutta-percha and sealer when compared to that of the other groups (P<0.05). Conclusions: Within the limitations of this study, the amount of gutta-percha and sealer in the XP group was lower than that in the EA, IS, and CI groups.

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Micro-CT evaluation of the effectiveness of the combined use of rotary and hand instrumentation in removal of Resilon

Cited by 13 publications

References 29 publications

The bond strength of adhesive resins to AH plus contaminated dentin cleaned by various gutta-percha solvents

The bond strength of adhesive resins to AH plus contaminated dentin cleaned by various gutta-percha solvents

3D micro-CT analysis of void formations and push-out bonding strength of resin cements used for fiber post cementation

Comparison of the Effectiveness of Different Techniques for Supportive Removal of Root Canal Filling Material

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