Radiographic effect of different radiopacifiers on a potential retrograde filling material

Bortoluzzi, Eduardo Antunes; Guerreiro-Tanomaru, Juliane Maria; Tanomaru-Filho, Mário; Duarte, Marco Antônio Húngaro

doi:10.1016/j.tripleo.2009.04.044

Cited by 69 publications

(101 citation statements)

References 36 publications

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“…In the present study, MTA showed 5 mmAl as radiopacity value, in accordance with previous studies 10) . MTA's radiopacifier is bismuth oxide, which promotes radiopacity when associated with PC 10,11) . Notwithstanding, bismuth oxide may increase PC's porosity, damaging the longevity of the material 7,8) .…”

Section: Discussionmentioning

confidence: 99%

“…It has already been demonstrated that the association of ZrO 2 with PC promotes radiopacity 10,11) , not causing damage to the fibroblasts 4) and periodontal ligament cells 12) . It was also showed that 30% of ZrO2 added to PC does not interfere in the hydration mechanism of this cement, providing calcium ions release and resulting in a bioactive material 14) .…”

Section: Discussionmentioning

confidence: 99%

“…Other materials have been evaluated as alternative to bismuth oxide, such as, zirconium oxide (ZrO 2) which provides proper radiopacity 10,11) , and cell viability 12) . Also, ZrO2 associated with PC presents radiopacity, compressive strength, setting time, water absorption and solubility similar to ProRoot MTA ®13) .…”

Section: Introductionmentioning

confidence: 99%

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Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

et al. 2014

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The aim of this study was to evaluate some properties of the calcium silicate materials Mineral Trioxide Aggregate (MTA) and Portland cement (PC) with microparticulated (micro) and nanoparticulated (nano) zirconium oxide (ZrO 2 ) or niobium oxide (Nb 2 O 5 ). The experimental materials: White PC (PC), MTA-Angelus ® (MTA), PC+ZrO 2 micro, PC+ZrO 2 nano, PC+Nb 2 O 5 micro and PC+Nb 2 O 5 nano were submitted to radiopacity and pH evaluations. Furthermore, the antimicrobial activity against different microorganisms was assessed by agar diffusion test. MTA presented higher radiopacity than other materials. However, all materials except PC presented higher radiopacity than recommended by ISO/ADA. MTA promoted higher pH values in all analyzed periods (p≤0.05). At the initial periods, PC and PC+ZrO 2 micro showed pH similar to MTA. All materials showed antimicrobial activity against the evaluated microorganisms. In conclusion, ZrO 2 and Nb 2 O 5 could be alternative radiopacifiers to be added to calcium silicate materials.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

et al. 2014

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“…Portland cement and MTA have similar major constituents, except for bismuth oxide, which is added to MTA to provide radiopacity (11,26,27). Although this feature does not compromise the execution of pulpotomy procedures with PC and their follow-up assessments, this property is necessary in order to distinguish the material from surrounding anatomical structures such as tooth and bone (11,17,18,28), and to permit the material to achieve the minimum values recommended by the American National Standards Institute / American Dental Association (ANSI/ADA) standard No 57/2000 (29).…”

Section: Discussionmentioning

confidence: 99%

“…The iodoform was tested as a radiopacifier for addition to Portland cement because of its satisfactory radiopacity, its widespread availability to clinicians, and earlier reports indicating that it is harmless to pulp and periapical tissues (28,30). The zirconium oxide, a bioinert material with good biocompatibility, has been confirmed to have good biocompatibility and no cytotoxic effects on fibroblasts (20,31).…”

Section: Discussionmentioning

confidence: 99%

Biocompatibility of Portland cement combined with different radiopacifying agents

et al. 2014

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The aim of this study was to evaluate the response of rat subcutaneous tissue to Portland cement combined with two different radiopacifying agents, iodoform (CHI 3 ) and zirconium oxide (ZrO 2 ). These materials were placed in polyethylene tubes and implanted into the dorsal connective tissue of Wistar rats for 7 and 15 days. The specimens were then stained with hematoxylin and eosin, and inflammatory reaction parameters were evaluated by light microscopy. The intensity of the inflammatory response to the sealants was analyzed by two blind calibrated observers throughout the experimental period. Histological analysis showed that all the materials caused a moderated inflammatory reaction at 7 days, which then diminished with time. At 15 days, the inflammatory reaction was almost absent, and fibroblasts and collagen fibers were observed indicating normal tissue healing. The degrees of the inflammatory reaction on different days throughout the experimental period were compared using the non-parametric Kruskal-Wallis test. Statistical analysis demonstrated no significant differences amongst the groups, and Portland cement associated with radiopacifying agents gave satisfactory results. Therefore, Portland cement used in combination with radiopacifying agents can be considered a biocompatible material. Although our results are very encouraging, further studies are needed in order to establish safe clinical indications for Portland cement combined with radiopacifying agents. (J Oral Sci 56, 29-34, 2014)

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A Novel Water‐Soluble Hexanuclear Bismuth Oxido Cluster – Synthesis, Structure and Complexation with Polyacrylate

et al. 2010

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The reaction of [Bi6O4(OH)4](NO3)6·H2O with triflic acid gave colorless single crystals of [Bi6O4(OH)4(OTf)6(CH3CN)6]·2CH3CN (1) upon crystallization from acetonitrile/chloroform. Compound 1 crystallizes in the monoclinic space group P21/n. The novel hexanuclear bismuth oxido cluster is highly soluble in water and polar organic solvents. A transparent and water‐soluble hybrid material was obtained by reaction of [Bi6O4(OH)4(OTf)6(CH3CN)6]·2CH3CN (1) with polyacrylate in aqueous solution. Molecular dynamics simulations were performed to study the complexation behavior of the [Bi6O4+x(OH)4–x](6–x)+ cation with polyacrylate in solution.

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Radiographic effect of different radiopacifiers on a potential retrograde filling material

Cited by 69 publications

References 36 publications

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Biocompatibility of Portland cement combined with different radiopacifying agents

A Novel Water‐Soluble Hexanuclear Bismuth Oxido Cluster – Synthesis, Structure and Complexation with Polyacrylate

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