Post space preparation timing of root canals sealed with AH Plus sealer

Kim, Hae-Ri; Kim, Young Kyung; Kwon, Tae‐Yub

doi:10.5395/rde.2017.42.1.27

Cited by 11 publications

(14 citation statements)

References 25 publications

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“…The hydrogen bonds decrease the mobility of monomers and consequently decrease the propagation rate of the reaction, resulting in a lower final degree of conversion (Dickens, Stansbury, Choi, & Floyd, 2003;Sideridou, Tserki, & Papanastasiou, 2002). The high conversion (close to 100%) observed for the unmodified AH-Plus is in line with what was described in other studies (Baldi et al, 2012;H. R. Kim, Kim, & Kwon, 2017).…”

Section: Discussionsupporting

confidence: 89%

Antimicrobial activity and physicochemical performance of a modified endodontic sealer

Gonçalves

Campos

Sanches

et al. 2020

RSD

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Introduction: this study aimed to evaluate the antimicrobial and physicochemical properties of a commercial endodontic sealer modified by the addition of montmorillonite (MMT) nanoparticles loaded with two different drugs: chlorhexidine (CHX) or metronidazole (MET). Methods: 5 wt% MMT/CHX or MMT/MET nanoparticles were added to the sealer AH-Plus. The experimental materials were evaluated for drug release, antimicrobial activity, flow, flexural strength, and flexural modulus. Data were subjected to one-way ANOVA, Kruskal-Wallis, and Mann-Whitney tests. Results: The drug incorporation into MMT particles was 9% and 10% for CHX and MET, respectively. At 20 days after manipulation, 16.5% of the drug was released by the sealer with MMT/MET and 0.4% by MMT/CHX. The addition of both nanoparticles decreased the flow of materials, but they were still in compliance with ISO 6876-2012. The conversion, flexural strength, and flexural modulus of MMT/MET (87%, 37±7 MPa, 2.3 GPa) and MMT/CHX (78%, 29±2 MPa, 2.7 GPa) were similar in both groups but lower than in the control group (100%, 54±7 MPa, 4.0±0.7 GPa). Both experimental materials were able to form an inhibition halo for E. faecalis bacteria (CHX: 4.8±1.4 and MET: 4.0±1.6 mm), whereas the control group did not inhibit the microorganism. Conclusion: both formulations proposed as endodontic sealer presented effective antimicrobial activity and acceptable flow. The addition of MMT/CHX and MMT/MET particles decreased the conversion and mechanical properties, but further studies are required to clarify the clinical relevance of these properties.

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Section: Discussionsupporting

confidence: 89%

Antimicrobial activity and physicochemical performance of a modified endodontic sealer

Gonçalves

Campos

Sanches

et al. 2020

RSD

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“…SEM analysis for BioRoot expressed evident formation of very defined and diverse precipitates (needle-like + spherical) when incubated pbs; and a little less defined and uniform (spherical) when incubated in sbf. The elemental analysis (SEM/EDS) confirmed the higher concentration of calcium and phosphate in the precipitates, according to the literature [8,27,[33][34][35]. Under FTIR/ATR and XRD analyses, BioRoot presented expressive peaks of calcium carbonate and carbonated hydroxyapatite when incubated in pbs and sbf; endorsing the findings from SEM analysis.…”

Section: Discussionsupporting

confidence: 76%

Impact of Immersion Media on Physical Properties and Bioactivity of Epoxy Resin-Based and Bioceramic Endodontic Sealers

et al. 2022

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This study assessed the effects of immersion media [distilled water (dw), phosphate buffered saline (pbs) and simulated body fluid (sbf)] in the physical properties [fluid uptake/sorption/solubility and alkalinization activity (pH)] and bioactivity of a bioceramic sealer: the BioRoot RCS (BioRoot) (Septodont). The epoxy-resin sealer AH Plus (Dentsply) was used as comparison. Sealers were immersed in dw, pbs and sbf to evaluate the fluid uptake/sorption/solubility and pH’s media. Bioactivity was assessed with SEM/EDS, FTIR-ATR and XRD. BioRoot solubility was as follows: sbf > pbs = dw. BioRoot had alkaline pH, and AH Plus had neutral pH, regardless of the medium. BioRoot presented mineral precipitates and peaks indicating hydroxyapatite-precursors in pbs and sbf. AH Plus physical properties were not affected by immersion media and it had no bioactivity. pbs and sbf should be preferred to investigate bioceramic sealers over distilled water, because they were able to highlight the sealer properties. BioRoot maintained the alkaline environment and favored hard tissue deposition.

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“…The reason for differences in the apical microleakage of AH Plus sealer in the immediate post space preparation method at the three time intervals: However, stresses due to post space preparation affect the polymerization process and the chemical properties of the sealer [ 3 ], increasing microleakage in the long term.…”

Section: Discussionmentioning

confidence: 99%

“…Sealers are necessary for all the obturation techniques and help achieve an impermeable seal [ 2 ]. Dentists routinely use the AH Plus resin sealer in different root canal obturation techniques due to its favorable characteristics, including adhesion to dentin and high sealing ability [ 3 ]. Therefore, it is a gold standard in comparative studies on newly introduced sealers [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the effect of post space preparation time on the apical seal of two different sealers

et al. 2022

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Background The present study compared the effect of post space preparation time on the apical seal of two different sealers. Methods In the in vitro study, 94 central incisors were used. After the samples’ root canal preparation, they were randomly assigned to four experimental groups (n = 21). The samples in groups 1 and 2 were obturated with AH Plus sealer, gutta-percha, and in groups 3 and 4 with Endoseal MTA bioceramic sealer and single cone technique. The post spaces in groups 1 and 3 were prepared immediately and in groups 2 and 4 with a delay. The samples were evaluated at 7-, 30-, and 90-day intervals for apical microleakage using the fluid filtration technique. The data were analyzed with SPSS 25, using three-way ANOVA and independent t-test. Results The apical microleakage in groups 3 and 4, obturated with Endoseal MTA bioceramic sealer and prepared immediately and after a delay, respectively, was not significantly different between the interval times. In group 2, obturated with AH Plus sealer and prepared for post space with a delay, the apical microleakage was significantly less than all the other groups. Group 1, obturated with AH Plus sealer and prepared for post space immediately, exhibited the least microleakage after seven days, but its microleakage increased over time to reach the level of groups 3 and 4. Conclusion According to the results, the apical microleakage in the AH + sealer group and the delayed post-space preparation method, was significantly less than all the other groups over time.

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Post space preparation timing of root canals sealed with AH Plus sealer

Cited by 11 publications

References 25 publications

Antimicrobial activity and physicochemical performance of a modified endodontic sealer

Antimicrobial activity and physicochemical performance of a modified endodontic sealer

Impact of Immersion Media on Physical Properties and Bioactivity of Epoxy Resin-Based and Bioceramic Endodontic Sealers

Comparison of the effect of post space preparation time on the apical seal of two different sealers

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