Ytterbium trifluoride as a radiopaque agent for dental cements

Collares, Fabrício Mezzomo; Ogliari, Fabrício Aulo; Lima, Giana S.; Fontanella, Vania Regina Camargo; Piva, Evandro; Samuel, Susana Maria Werner

doi:10.1111/j.1365-2591.2010.01746.x

Cited by 43 publications

(44 citation statements)

References 28 publications

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“…The incorporation of inorganic fillers into polymers may enhance adhesives' mechanical properties and improve the clinical practice 5,[7][8][9][10][11] . It decreases the composite's organic phase and the adhesives may be more hydrolytic stable, as the water sorption occurs mainly in the organic matrix 29) .…”

Section: Discussionmentioning

confidence: 99%

“…Many modifications have been proposed in the adhesive resins to contribute to the longevity of the restorative treatments [4][5][6] . A current trend involves the incorporation of inorganic fillers to decrease the relative amount of organic phase, providing a higher hydrolytic stability to resin and a reliable cavity seal [7][8][9][10][11][12] . Besides physical and chemical properties, the addition of inorganic fillers may increase the radiopacity.…”

Section: Introductionmentioning

confidence: 99%

“…To eliminate the use of glasses, one solution is to use heavy-atom compound as homogeneous filler in matrix 15) . Ytterbium trifluoride (YbF3) 11) , barium sulphate (BaSO4), calcium tungstate (CaWO4) 16) and niobium pentoxide (Nb2O5) 8,10) have been used. However, the incorporation of the inorganic filler needs to be in low concentrations in order to not compromise the wetting of the dental substrate due to high viscosity of the resin while it is possible to increase the radiopacity and mechanical properties of the material 14) .…”

Section: Introductionmentioning

confidence: 99%

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Tantalum oxide as filler for dental adhesive resin

García

Leitune

Ferreira

et al. 2018

Dental Materials Journal

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The purpose of this study was to formulate and evaluate an adhesive resin with tantalum oxide. Ta2O5 was evaluated by scanning electron microscopy and laser diffraction. The adhesive was formulated with methacrylate monomers and photoinitiators. Ta2O5 was added into the adhesive at 1, 2, 5 and 10 wt%. One group remained without filler (control group). Ta2O5 distribution, radiopacity (n=5), degree of conversion (DC) (n=3), softening in solvent (n=5) and ultimate tensile strength (UTS) (n=10) were evaluated. Data were analyzed by one-way ANOVA and Tukey's test (α=0.05). Spherical nanometric Ta2O5 was arranged in 3.35 µm particles. The groups over 5 wt% presented higher radiopacity (p<0.05). The DC ranged from 61.78 (±1.19)% to 67.35 (±1.40)%, with statistical difference from control group over 5 wt% addition (p<0.05). There was no difference in softening in solvent (p>0.05) and UTS (p>0.05). Tantalum oxide is a promising alternative for adhesive formulation and it could be further tested for biomimetic remineralization.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tantalum oxide as filler for dental adhesive resin

García

Leitune

Ferreira

et al. 2018

Dental Materials Journal

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“…Os valores médios e os desvios-padrão dos níveis de cinza (em densidade de pixels) dos corpos de prova e da escala de alumínio foram obtidos em uma área padronizada por corpo--de-prova, previamente estabelecida de 8 mm². O ensaio foi repetido em cinco corpos de prova de cada formulação experimental e a radiopacidade equivalente foi expressa em milímetros de alumínio 12 .…”

Section: Radiopacidadeunclassified

Polímero de MMA para base de dentadura com a adição de subnitrato de bismuto

Rodrigues

Leitune

Hashizume

et al. 2014

Rev. da Fac. de Odontologia, UPF

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Objetivo: o presente estudo tem por objetivo avaliar a influência da adição de diferentes concentrações de subnitrato de bismuto (SN) nas propriedades de materiais para base protética. Materias e método: foi adicio- IntroduçãoNa Odontologia, as resinas acrílicas são utilizadas por apresentarem propriedades e caracterís-ticas essenciais para as funções clínicas. Diversos dispositivos protéticos são confeccionados com resinas acrílicas, tais como dentaduras, coroas provisó-rias e aparelhos ortodônticos [1][2][3] . Entretanto, as resinas acrílicas ainda manifestam algumas limitações como a radiolucidez e a porosidade que podem levar ao acúmulo de microrganismos 4 . Em casos de acidentes traumáticos com dispositivos de resina acrílica, existem relatos de penetração de fragmentos em tecido mole do paciente ou de aspiração. Por não ser um material com caracterís-ticas radiopacas, sua remoção pode tornar-se demorada devido à dificuldade de localização por radiografia. Dos pacientes que usam próteses dentárias removíveis 5 , de 30% a 60% apresentam estomatites protéticas, condição inflamatória crônica associada com a mucosa oral afetada 6,7 . Assim, a adição de substâncias que possam melhorar a radiopacidade e a capacidade antimicrobiana das resinas acrílicas são desejadas.O subnitrato de bismuto (SN) que, além de ser radiopaco, tem potencial antimicrobiano contra Helicobacter pylori 8 pode ser uma alternativa de

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“…These materials present in their compositions filler particles that provide better mechanical properties, rheological adjustment, and radiopacity [1,[3][4][5][6] . Bismuth compounds are often used in root canal sealers to provide radiopacity [7,8] and have been used in Grossman's sealer [9] . However, resin-based endodontic sealers have been presented better properties than water-based sealers [10] .…”

Section: Introductionmentioning

confidence: 99%

Bismuth subcarbonate as filler particle for an epoxy-based root canal sealer

Schwartzer¹,

Genari²,

Leitune³

et al. 2013

Polímeros

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Introduction: The aim of this study was to evaluate the addition of bismuth subcarbonate with different concentrations regarding the rheological properties of an experimental epoxy-based root canal sealer. Materials and Methods: Endodontic sealers were prepared with epoxy resin-based sealer with bismuth subcarbonate additions of 20%, 40%, 60%, 80%, 100%, and 120%. Flow, film thickness, working time, setting time, dimensional change, sorption, solubility, and cytotoxicity were studied according to the ISO standards. Data were statistically analyzed by one-way ANOVA, and Tukey multiple comparisons were used, with a significance level of 5%. Results: The flow, working time, water sorption, and solubility significantly decreased and the film thickness and dimensional change increased with higher filler particle addition. There were no statistically significant differences for setting time and cytotoxicity between the filler particle proportions. Conclusion: Experimental resin-based sealer with bismuth subcarbonate addition up to 40% can be an alternative for root canal sealer.

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Ytterbium trifluoride as a radiopaque agent for dental cements

Abstract: The experimental dental cements with at least 30% added ytterbium trifluoride had satisfactory radiopacity without influencing other properties.

Cited by 43 publications

References 28 publications

Tantalum oxide as filler for dental adhesive resin

Tantalum oxide as filler for dental adhesive resin

Polímero de MMA para base de dentadura com a adição de subnitrato de bismuto

Bismuth subcarbonate as filler particle for an epoxy-based root canal sealer

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