Residual Endodontic Filling Material after Post Space Preparation: A Confocal Microscopic Study

Teoh, Yu-Yao; Walsh, L. J.

doi:10.3390/ma10111333

Cited by 8 publications

(5 citation statements)

References 25 publications

(28 reference statements)

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“…Therefore, the presence of endodontic sealer was evident in almost all samples analyzed. This is corroborated by previous studies reporting that, even after the preparation of the space that will receive the post, there are endodontic sealer remnants on the walls and in the dentinal tubules (3,16). The use of EDC does not influence the presence of sealer, since its use does not aim at the removal of this material from the canal wall, but rather at the biomodification of the dentin collagen structure (25).…”

Section: Dentin Adhesion Of Fiberglass Postssupporting

confidence: 77%

“…It is known that the adhesion between resin cement, root dentin and post can be affected by the type of the endodontic sealer used (4,15). This is because, even with the chemical and mechanical preparation of the space for the intraradicular retainer, the remaining endodontic material stays adhered on the walls of the root canal and inside the dentinal tubules (3,16).…”

Section: Introductionmentioning

confidence: 99%

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Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide on Adhesion of Posts in Teeth Obturated With Different Sealers

et al. 2020

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The aim of this study was to evaluate the effect of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) on bond strength of fiberglass posts in root canals obturated with different endodontic sealers. Seventy-eight mandibular premolars were obturated with three sealers (n=26): Endofill (END), AH Plus (AHP), and Endosequence BC Sealer (EBS). After preparation of the post space, two subgroups were formed according to the cementation of the posts (n=13): with EDC (EDC), and without EDC (control - CON). The specimens were submitted to a pull-out test, failure mode classification, and root canal surface evaluation by scanning electron microscopy after post displacement. Regarding the bond strength, a significant difference between the EDC and CON subgroups occurred only in the END (p=0.001). No difference was detected among the CON subgroups (p=0.339). However, among the EDC subgroups, AHP presented significantly higher values (END versus AHP: p=0.001; AHP versus EBS: p=0.016). Upon classification of failure modes, score 1 (≥ 50% of cement) was the most commonly observed, except for the END + EDC. Remains of endodontic sealers and resin cements were found in the cervical third, but without statistical difference (p=0.269), while in the middle third, difference occurred (p=0.004). In conclusion, EDC decreases bond strength when associated with END sealer, without changing the failure mode between the resin cement and fiberglass post. The best performance was observed when EDC was combined with AHP sealer.

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Section: Dentin Adhesion Of Fiberglass Postssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide on Adhesion of Posts in Teeth Obturated With Different Sealers

et al. 2020

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“…Accordingly, they lack the ability to etch through the smear layer created from the post space mechanical preparation. Henceforth, removing the smear layer is required during biomechanical post space preparation to permit better collagen infiltration, improving the contact surface of the cement with the dentin and acquiring sufficiently clean dentinal walls [11,12].…”

Section: Discussionmentioning

confidence: 99%

“…For correct and effective cementation, the post space walls must be made of dentin to create an adequate hybrid zone between the resin cement and the dentinal tubules [12]. Enlarging the canal beyond the size of the initial preparation reduces the amount of obturating material residue on the canal walls [10].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Different Irrigation Techniques on Post Space Smear Layer Removal: SEM Evaluation

et al. 2023

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Background: Effective debris and smear layer removal affects post-cementation and bond strength. Aim: The aim was to compare the effectiveness of debris and smear layer removal using standard irrigation and activated irrigation with heated EDTA. Moreover, an irrigant activation technique was chosen in the current research, employing the ultrasonic activation of an EDTA solution after being heated directly inside the post space preparation. Materials and Methods: 30 single-rooted human mandibular premolar teeth were used in the current study to test the proposed techniques. First, the teeth were cut to have standardised roots 18 mm in length and prepared endodontically, and then the post space was carried out on all the samples. Then the specimens were randomly distributed into three study groups according to the post space irrigation technique. In detail, the groups were group 1, where a 3D cleaning technique was used; group 2, where the traditional irrigation with EDTA was applied; and group 3, where only saline as an irrigant was used. The third group was considered the control group. Next, the teeth were segmented and analysed via scanning electron microscopy (SEM). The magnification was used to evaluate and score the smear layer and debris. Statistical analysis was undertaken using the classic statistical software package (SPSS, version 28.0; SPSS IBM, Armonk, NY, USA). Then, the data were interpreted with a non-parametric analysis of variance (Kruskal–Wallis ANOVA) among the experiment groups. The significance level was decided as p < 0.05. In addition, statistically significant (p < 0.05) lower mean smear layer and debris scores were found in both the examination groups compared to the control group. Results: group 1 demonstrated better results compared to group 2 in terms of cleaning the dentinal walls. Conclusions: The current research concluded that the EDTA 3D cleaning technique is an effective irrigation technique for clearing debris and smear layers in the post space. Future research, such as on push-out bond strength, should be used to verify this research’s conclusions. Key findings: The use of ultrasonically activated heated EDTA improved the smear layer removal. The use of the 3D cleaning technique resulted in better post space cleaning.

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“…Currently, there is no reliable and effective way to remove BCS from the root canals and DTs [ 11 – 13 ]. Enlarging a root canal space with post drills and passive ultrasonic irrigation (PUI) has been used unsuccessfully to open the DTs for resin cement [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Post retention strength of apical and conventional coating obturation methods using bioceramic sealer: a laboratory investigation

Chanapairin,

Kulvitit,

Sathorn

2024

BMC Oral Health

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Background Once bioceramic sealer (BCS) enters the dentinal tubules, it cannot be reliably removed. BCS-occupied dentinal tubules reduce fibre post retention strength. Coating gutta-percha with BCS only on the apical portion may improve post retention strength due to increased retention strength between the dentin and resin cement interface. The aim of the study was to test this hypothesis. Methods Root canals of 27 extracted human mandibular premolars were instrumented and randomly assigned to three obturation methods: conventional coating (CC), non-coating (NC), and apical coating (AC). The root canals were obturated with gutta-percha to 4 mm from the working length under an operating microscope. After the BCS was completely set, post spaces were prepared, and quartz fibre posts were cemented. The apical 4.5 mm of the roots were removed. Two samples were prepared at the apical, middle, and coronal root levels (one for scanning electron microscope (SEM) study and another for the push out bond strength (PBS) test). After the PBS test, the samples were examined with a stereo microscope to determine the failure mode: dentine-cement (DC), post-cement (PC) and mixed. The PBS data were analysed by One way ANOVA for the specific obturation method effects. Repeated ANOVA was used for the specific effects of the root levels on PBS in different obturation methods. Results At all three root levels, more continuous hybrid layers and denser resin tags were found in the NC and AC than the CC group. The AC and NC groups’ PBS was significantly higher than the CC group at the apical 1/3 (p = 0.002 and p = 0.001) and coronal 1/3 (p = 0.016 and p = 0.041). The PBS in the CC group at the middle 1/3 was significantly higher than the apical 1/3 (p = 0.022). DC failure mode was most commonly found in the CC group, while PC failure mode was found most frequently in the NC and AC groups. Conclusions The apical coating obturation method significantly increased PBS over the conventional coating method, potentially reducing fiber post dislodgement. However, this study was only preliminary. Clinical studies are required to confirm the results.

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Residual Endodontic Filling Material after Post Space Preparation: A Confocal Microscopic Study

Cited by 8 publications

References 25 publications

Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide on Adhesion of Posts in Teeth Obturated With Different Sealers

Effects of 1-Ethyl-3-(3-Dimethylaminopropyl) Carbodiimide on Adhesion of Posts in Teeth Obturated With Different Sealers

Effectiveness of Different Irrigation Techniques on Post Space Smear Layer Removal: SEM Evaluation

Post retention strength of apical and conventional coating obturation methods using bioceramic sealer: a laboratory investigation

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