Epoxy Resin-Based Root Canal Sealer Penetration into Dentin Tubules Does not Improve Root Filling Dislodgement Resistance

De‐Deus, Gustavo; BrandÓo, Maria Claudia; Souza, Erick Miranda; Reis, Cecília; Reis, Kátia Rodrigues; Machado, Ricardo; Neelakantan, Prasanna

doi:10.5152/eej.2017.16059

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…In most parts of a specimen the dentinal tubule penetration is lower than the values used for statistical analysis. The thesis of overestimated dentinal tubule penetration is supported by recent findings that dentinal tubule penetration investigated by CLSM did not correlate with dislodgement resistance of root canal fillings [ 22 ].…”

Section: Discussionmentioning

confidence: 85%

Minimal Dentinal Tubule Penetration of Endodontic Sealers in Warm Vertical Compaction by Direct Detection via SEM Analysis

Schmidt¹,

Schäfer²,

Bürklein³

et al. 2021

JCM

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Sealer staining using rhodamine B dye to investigate the penetration depth of endodontic sealers was proven unsuitable for this purpose. This study aimed to investigate the sealer penetration depth into dentinal tubules by scanning electron microscopy (SEM). Root canals of 52 human upper central incisors were instrumented using the ProTaper Gold NiTi system (Dentsply Sirona, York, PA, USA) up to size F3. After irrigation with sodium hypochlorite and citric acid combined with ultrasonic activation, the root canals were either filled using the epoxy resin sealer AH Plus (Dentsply Sirona) or the calcium silicate-based sealer Total Fill BC Sealer HiFlow (TFHF, FKG Dentaire, La Chaux-de-Fonds, Switzerland) by warm vertical compaction. Root slices of 1 mm thickness were obtained at 2 to 3, 5 to 6 and 8 to 9 mm from the apex. The root slices were investigated for sealer penetration into the dentinal tubules using SEM according to four root quadrants (buccal, mesial, oral, distal). Statistical analysis was performed by the Kruskal-Wallis test (p = 0.05) as data were not normally distributed according to the Shapiro-Wilk test. AH Plus penetrated significantly deeper into the dentinal tubules compared to TFHF at each root level (p < 0.05). Dentinal sealer penetration was deeper in the bucco-oral direction compared to the mesio-distal direction. AH Plus penetrated deeper into dentinal tubules than TFHF. Warm vertical compaction exerting high pressure on the root canal filling material is not able to press sealers deep into dentinal tubules as penetration depth values did not exceed a mean of 110 µm in SEM.

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Section: Discussionmentioning

confidence: 85%

Minimal Dentinal Tubule Penetration of Endodontic Sealers in Warm Vertical Compaction by Direct Detection via SEM Analysis

Schmidt¹,

Schäfer²,

Bürklein³

et al. 2021

JCM

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“…It is worth remembering that the endodontic scientific community has been guilty of overestimating the relationship between logic, that is deductive reasoning, and reliable scientific evidence before. For example, De-Deus et al (2012, 2017b concluded that sealer penetration of dentinal tubules which had been used historically as an indication of the superiority of a given root filling technique or material had no basis in fact and that there was no experimental evidence to support that claim. Interestingly, that false rationale had also been used as promotional material to launch new root filling materials.…”

Section: Discussionmentioning

confidence: 99%

Do pre‐existing microcracks play a role in the fracture resistance of roots in a laboratory setting?

Cavalcante¹,

Belladonna²,

Simões‐Carvalho³

et al. 2020

Int Endodontic J

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Aim To investigate a potential cause-effect relationship between dentinal microcracks and fracture resistance of mandibular incisors that had not been endodontically treated. Methodology Sixty mandibular incisors with circular-shaped canals were selected based on microcomputed tomographic scans to create a homogeneous sample. The cross-sectional images of the specimens were screened to identify and quantify the presence of dentinal microcracks. Then, teeth were embedded in polystyrene resin and subjected to axial compressive loading using a universal testing machine. After fracture, the roots were re-scanned and fractography analysis was performed by inspection of 3D models to verify crack propagation. Spearman's rank correlation was used to assess the correlation between the number of microcracks and force required to fracture. Results Dentinal microcracks were detected in 79% of the specimens (n = 44). The incidence of microcracks varied between teeth from 6% to 42% of the total slices per sample (average of 14 AE 17%). The number of microcracks per sample varied from 0 to 1605, with an average of 412 AE 484 (median = 221 and IQR 25% = 15/75% = 658). The load at failure values varied from 227 to 924 N, with an average of 560.3 AE 168.1 N (median = 561 and IQR 25% = 458/75% = 694). The Spearman correlation coefficient (rho) equalled 0.065. Conclusions There was no cause-effect relationship between the number of dentinal microcracks and the fracture resistance of nonendodontically treated mandibular incisors. The presence and quantity of microcracks did not make these roots more prone to fracture.

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“…Scanning electron microscopy (SEM) has been deployed in previous studies to highlight the sealer characterization, to analyze the sealer–dentin interface and sealer’s penetration into dentinal tubules [ 50 , 51 , 52 , 53 , 54 , 55 ]. In similar studies, a comparable number of samples were selected for SEM investigation [ 35 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Bond Strength of Four Different Root Canal Sealers

et al. 2022

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The purposes of the study were to evaluate the influence of the sealer’s chemical composition on the interfacial strength between root canal dentin and root filling material, for two different classes of endodontic sealers, and to assess their failure modes. Methods: Forty extracted single-rooted teeth were randomly divided into four groups using the following endodontic sealers: RealSeal SE and Resilon (RSSE); EndoSequence BC sealer and BC Point (EBCS); Endoseal MTA and gutta-percha (EDS); Bioroot RCS and gutta-percha (BRS). Teeth were embedded in acrylic resin, and the roots were sectioned horizontally into 1 mm slices. For each slice, the perimeter was measured. A push-out test was performed using an Instron universal testing machine. For each sample, bond strength was calculated. Specimens were examined by SEM investigation in order to analyze the dentin–sealer–core interface. Results were assessed using analysis of variance (ANOVA) and Tukey and Bonferroni test. Results: Statistical analysis revealed that EDS and gutta-percha had significantly higher resistance to dislodgement compared to the other three groups (p < 0.05). EBCS and BC Point showed significantly greater push-out bond strength values compared to RSSE and Resilon (p < 0.05). Conclusions: Bioceramic endodontic sealers showed a higher bond strength to root dentin than methacrylate resin-based endodontic sealer.

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Epoxy Resin-Based Root Canal Sealer Penetration into Dentin Tubules Does not Improve Root Filling Dislodgement Resistance

Cited by 7 publications

References 25 publications

Minimal Dentinal Tubule Penetration of Endodontic Sealers in Warm Vertical Compaction by Direct Detection via SEM Analysis

Minimal Dentinal Tubule Penetration of Endodontic Sealers in Warm Vertical Compaction by Direct Detection via SEM Analysis

Do pre‐existing microcracks play a role in the fracture resistance of roots in a laboratory setting?

Evaluation of Bond Strength of Four Different Root Canal Sealers

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