The impact of the addition of iodoform on the physicochemical properties of an epoxy-based endodontic sealer

Kuga, Milton Carlos; Faria, Gisele; Só, Marcus Vinícius Reis; Keine, Kátia Cristina; Santos, Alailson Domingos dos; Duarte, Marco Antônio Húngaro; Kopper, Patrícia Maria Poli

doi:10.1590/1678-775720130052

Cited by 18 publications

(21 citation statements)

References 20 publications

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“…These substances could negatively influence the other properties of the sealers. 25 The present study suggested that when radio-opacity was evaluated by the simulator method, the same sealer that was considered only slightly radio-opaque by the birpublications.org/dmfr Dentomaxillofac Radiol, 44, 20140422…”

Section: Discussionmentioning

confidence: 78%

A newin vitromethod to evaluate radio-opacity of endodontic sealers

Malka¹,

Hochscheidt²,

Larentis³

et al. 2015

Dentomaxillofacial Radiology

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Objectives: To evaluate a new method for assessing the radio-opacity of endodontic sealers and to compare radio-opacity values with a well-established standard method. Methods: The sealers evaluated in this study were AH Plus ® (Dentsply DeTrey GmbH, Konstanz, Germany), Endo CPM Sealer (EGEO SRL, Buenos Aires, Argentina) and MTA Fillapex ® (Angelus Dental Products Industry S/A, Londrina, Parana, Brazil). Two methods were used to evaluate radio-opacity: (D) standard discs and (S) a tissue simulator. For (D), ten standard discs were prepared for each sealer and were radiographed using Digora ® phosphor storage plates (Soredex; Orion Corporation, Helsinki, Finland), alongside an aluminium stepwedge. For (S), polyethylene tubes filled with sealer (n 5 10 for each) were radiographed inside the simulator as described. The digital images were analysed using Adobe Photoshop ® software v. 10.0 (Adobe Systems, San Jose, CA). To compare the radio-opacity among the sealers, the data were analysed by ANOVA and Tukey's test, and to compare methods, they were analysed by the Mann-Whitney U test. To compare the data obtained from dentin and sealers in method (S), Student's paired t-test was used (50.05). Results: In both methods, the sealers showed significant differences, according to the following decreasing order: AH Plus, MTA Fillapex and Endo CPM. In (D), MTA Fillapex and Endo CPM showed less radio-opacity than aluminium. For all of the materials, the radio-opacity was higher in (S) than in (D). Compared with dentin, all of the materials were more radio-opaque. Conclusions: The comparison of the two assessment methods for sealer radio-opacity testing validated the use of a tissue simulator block. Dentomaxillofacial Radiology (2015Radiology ( ) 44, 20140422. doi: 10.1259 Cite this article as: Malka VB, Hochscheidt GL, Larentis NL, Grecca FS, Fontanella VRC, Kopper PMP. A new in vitro method to evaluate radio-opacity of endodontic sealers. Dentomaxillofac Radiol 2015; 44: 20140422.

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Section: Discussionmentioning

confidence: 78%

A newin vitromethod to evaluate radio-opacity of endodontic sealers

Malka¹,

Hochscheidt²,

Larentis³

et al. 2015

Dentomaxillofacial Radiology

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“…18,19 In contrast, the final setting of the epoxy resin-based sealer had been achieved by 7 days. 19,21 The concept that "like dissolves like" (polar solvents are better at dissolving polar substances), and vice versa explains the higher incidence of remaining sealer residues for the cleaning protocol employing ethanol.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, these sealers require a long time to achieve final setting, and it is not clear at which time-point it is optimal to perform acid etching. 18,19 Therefore, the aim of this study was to evaluate the effect of acid etching on the dentin surface, performed either immediately or 7 days after removal of the endodontic sealer with solvents.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols

et al. 2016

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Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but is effect on residual sealer material and the optimal time-point for performing etching, are unknown. Here, we evaluated the effect of acid etching on the dentin surface when performed either immediately or 7 days after removal of the endodontic sealer with two solvents, i.e., 95% ethanol or xylol. Forty crowns fragments from bovine incisors were impregnated with sealer and divided into 4 groups (n = 10 each), according to the dentin cleaning protocol and to the acid etching time-point: G1, 95.0% ethanol and immediate acid etching; G2, xylol and immediate acid etching; G3, 95.0% ethanol and acid etching after 7 days; and G4, xylol and acid etching after 7 days. Scanning electron microscopy (SEM) images (2000 ×) were obtained from each specimen and the number of open dentinal tubules counted and compared. Another 40 fragments were similarly prepared, and SEM images were obtained (500 ×) to score and compare the persistence of sealer residues on the dentin. G4 showed the most open dentinal tubules and the least epoxy resin-based sealer residues on the dentin surface (p < 0.05). The least epoxy resin-based sealer residues was obtained when acid etching, using 37% phosphoric acid, was performed after 7 days after cleaning the dentin with xylol.

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“…However, few studies have examined the viscosity of root canal sealers. 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 The majority of previous studies measuring the flowabilities of root canal sealers 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 used the simple press method that is specified by the International Organization for Standardization (ISO) 6876. 20 Although this method is simple and economical, 18 the information obtained is limited in that this method can determine only the compressed sealer diameter.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the rheological properties of four root canal sealers

et al. 2014

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The flowability of a root canal sealer is clinically important because it improves the penetration of the sealer into the complex root canal system. The purpose of this study was to compare the flowabilities of four root canal sealers, measured using the simple press method (ISO 6876), and their viscosities, measured using a strain-controlled rheometer. A newly developed, calcium phosphate-based root canal sealer (Capseal) and three commercial root canal sealers (AH Plus, Sealapex and Pulp Canal Sealer EWT) were used in this study. The flowabilities of the four root canal sealers were measured using the simple press method (n=5) and their viscosities were measured using a strain-controlled rheometer (n=5). The correlation between these two values was statistically analysed using Spearman's correlation test. The flow diameters and the viscosities of the root canal sealers were strongly negatively correlated (ρ=−0.8618). The viscosity of Pulp Canal Sealer EWT was the lowest and increased in the following order: AH Plus

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The impact of the addition of iodoform on the physicochemical properties of an epoxy-based endodontic sealer

Cited by 18 publications

References 20 publications

A newin vitromethod to evaluate radio-opacity of endodontic sealers

A newin vitromethod to evaluate radio-opacity of endodontic sealers

Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols

Comparison of the rheological properties of four root canal sealers

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