Ytterbium Oxide as Radiopacifier of Calcium Silicate-Based Cements. Physicochemical and Biological Properties

Costa, Bernardo Cesar; Guerreiro-Tanomaru, Juliane Maria; Bosso‐Martelo, Roberta; Rodrigues, Érico; Bonetti-Filho, Idomeo; Tanomaru‐Filho, Mário

doi:10.1590/0103-6440201802033

Cited by 16 publications

(13 citation statements)

References 24 publications

(43 reference statements)

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“…The bioactivity test was performed based on a previous study (16). The sealers were manipulated, inserted into cylindrical molds measuring 1 mm high x 7.5 mm in diameter and remained in an oven at 37ºC and 95% humidity until the complete setting.…”

Section: Bioactive Potentialmentioning

confidence: 99%

Physicochemical Properties and Bioactive Potential of a New Epoxy Resin-based Root Canal Sealer

et al. 2019

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The aim of this study was to evaluate physicochemical properties and bioactive potential of Sealer Plus, in comparison with MTA Fillapex, Sealapex and AH Plus. Setting time, flow, and radiopacity were evaluated based on ISO 6876 Standard. Flow was also assessed in area (mm²). The solubility and volumetric change of the sealers were evaluated after 7 and 30 days of immersion in distilled water. Solubility was evaluated by the difference in mass of materials before and after immersion. Volumetric change was evaluated by using microcomputed tomography (micro-CT). The bioactive potential was observed by Scanning Electron Microscopy (SEM) after immersion in PBS. Data were compared using ANOVA and Tukey tests (α=0.05). Sealer Plus presented the shortest setting time (196 min.) and Sealapex the longest (912 min.) (p<0.05). AH Plus showed the highest radiopacity (9.5 mm Al) and MTA Fillapex the lowest (2.7 mm Al) (p<0.05). All the sealers presented flow in accordance with ISO 6876/2012 (>17 mm). Sealer Plus showed low solubility and volumetric change (<1%), and MTA Fillapex showed the highest solubility (>25%), and volumetric change (>4%) after all time intervals (p<0.05). MTA Fillapex was the only sealer that showed bioactive potential. In conclusion, Sealer Plus presented proper physicochemical properties. However, this sealer did not present a bioactive potential.

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Section: Bioactive Potentialmentioning

confidence: 99%

Physicochemical Properties and Bioactive Potential of a New Epoxy Resin-based Root Canal Sealer

et al. 2019

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“…An ideal repair material should seal any possible communication between the root canal system and adjacent tissues (1). The mineral trioxide aggregate (MTA) is widely used for several applications in the endodontic practice due to its suitable properties (2). Likewise, it has excellent biological response and biocompatibility (3).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties of a Bioceramic Repair Material - BioMTA

et al. 2020

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This study aimed to assess the physicochemical properties of a repair material in the Brazilian market, BioMTA, in comparison to other two materials currently in use (Biodentine and MTA Angelus). The initial setting time was evaluated using Gillmore needle. The pH was measured with a pH-meter after 24 h, 3, 7, 14 and 21 days. The radiopacity was determined using the equivalence in millimeters of aluminum (mm Al) from digitized occlusal radiographs. Solubility was determined after immersion in water for 7 days. The data were analyzed by one-way ANOVA and Tukey tests (a=0.05). The BioMTA initial setting time (5.2 min) was lower than the other materials (p<0.05). All materials showed an alkaline pH at 21 days. At 24 h, BioMTA was the most alkaline material (p<0.05); and at 3, 7, 14 and 21 days there was no difference between BioMTA and Biodentine (p>0.05), both being more alkaline than MTA Angelus (p<0.05). The radiopacity of BioMTA (4.2 mm Al) was significantly higher compared to Biodentine (p<0.05) and lower than MTA Angelus (p<0.05). The solubility of the materials was -4.2%, -1.6% and 4.1% for BioMTA, MTA Angelus and Biodentine, respectively, with a significant difference between them (p<0.05). Therefore, it can be concluded that BioMTA displayed a shorter setting time, an alkaline pH, a higher radiopacity, and a gain in mass.

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“…Endodontic materials are required to possess a minimum radiopacity equivalent to 3 mm Al [6], which is achieved by dry-blending the cement with radiopaque barium sulfate or metal oxide compounds of bismuth, zirconium, tantalum, or niobium [1][2][3][4][5]. A range of alternative candidate radiopacifying agents, including TiF 4 , CaWO 4 , Yb 2 O 3 , YbF 3 and CHI 3 , has also been proposed [7][8][9][10][11][12]. Of these, CHI 3 (iodoform) is a common constituent of commercial calcium hydroxide-based pulp capping formulations (e.g., Vitapex ® (Neo Dental International Inc., Federal Way, WA, USA) and Metapex (Meta Biomed, Colmar, PA, USA)).…”

Section: Introductionmentioning

confidence: 99%

Iodoform-Blended Portland Cement for Dentistry

Deacon

Coleman

2020

Prosthesis

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Portland cement-based formulations blended with radiopacifying agents are popular endodontic materials for various root filling and pulp capping applications. Iodoform (CHI3) is an alternative candidate radiopacifier whose impact on the setting, bioactivity, antimicrobial properties and cytotoxicity of white Portland cement were evaluated in this study. Isothermal conduction calorimetry and 29Si magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR) showed that 20 wt% iodoform had no significant impact on the kinetics of cement hydration with respect to the formation of the major calcium silicate hydrate (C-S-H) gel product (throughout the 28-day observation). Conversely, transmission electron microscopy demonstrated that iodine was incorporated into the ettringite (Ca₆Al₂(SO₄)₃(OH)₁₂·26H₂O) product phase. Both iodoform-blended and pure Portland cements exhibited comparable biocompatibility with MG63 human osteosarcoma cells and similar bioactivity with respect to the formation of a hydroxyapatite layer upon immersion in simulated body fluid. By virtue of their high alkalinity, both cements inhibited the growth of Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli. However, in all cases, iodoform enhanced the antimicrobial effect and significantly reduced the minimum bactericidal concentration of the cement. In conclusion, iodoform offers antimicrobial advantages in Portland cement-based formulations where oral biofilm formation threatens the success of root filling materials and dentine substitutes. The reactivity with the calcium aluminosulfate components of the hydrating cement matrix warrants further research to understand the long-term stability of the cement matrix in the presence of iodoform.

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Ytterbium Oxide as Radiopacifier of Calcium Silicate-Based Cements. Physicochemical and Biological Properties

Cited by 16 publications

References 24 publications

Physicochemical Properties and Bioactive Potential of a New Epoxy Resin-based Root Canal Sealer

Physicochemical Properties and Bioactive Potential of a New Epoxy Resin-based Root Canal Sealer

Physicochemical Properties of a Bioceramic Repair Material - BioMTA

Iodoform-Blended Portland Cement for Dentistry

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