Radiopacity evaluation of root-end filling materials by digitization of images

Tanomaru‐Filho, Mário; Silva, Guilherme Ferreira da; Duarte, Marco Antônio Húngaro; Gonçalves, Marcelo; Tanomaru, Juliane Maria Guerreiro

doi:10.1590/s1678-77572008000600004

Cited by 61 publications

(71 citation statements)

References 26 publications

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“…Radiopacity in an essential property for a cement to be identified and distinguished from the adjacent anatomic structures (18). Similarly, it is stressing that is also crucial use of radiopacifiers that do not compromise biocompatibility and the physico-chemical performance of the materials (19).…”

Section: Discussionmentioning

confidence: 99%

Cytotoxicity of New Calcium Aluminate Cement (EndoBinder) Containing Different Radiopacifiers

et al. 2017

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This study aimed to evaluate the cytotoxicity of a calcium aluminate cement (EndoBinder) containing different radiopacifiers, Bi 2 O 3 , ZnO or ZrO 2 , compared with Mineral Trioxide Aggregate (MTA). According to ISO 10993-12:2012 (E) recommendations, 0.2 g of each cement were applied in transwell inserts and placed in 24-well culture plates containing 1 mL of culture medium (DMEM). After 24 h of incubation, the extracts (DMEM containing components released from the cements) were applied to immortalized odontoblast-like MDPC-23 cells. Cell viability (MTT test), alkaline phosphatase activity (ALP), total protein production and cell morphology (Scanning Electron Microscopy -SEM) were evaluated. The volume of 50 µL of extract was used to determine the chemical elements released by the cements using Energy Dispersive Spectroscopy (EDS). The following groups were established (n=6): NC -negative control (without treatment); EB -EndoBinder without radiopacifier; EBBO -EndoBinder+Bi 2 O 3 ; EBZnO -EndoBinder+ZnO; EBZrOEndoBinder+ZrO 2 and WMTA -White MTA. Data were subjected to statistical analysis (Kruskal-Wallis test, level of significance=5%). Cells exposed to the different versions of EndoBinder presented small reduction in viability, total protein production and ALP activity, with values similar to the NC and WMTA groups (p>0.05). Different elements (C, O, Na, Al, P, Si, Cl, Bi, K) released by the cements were detected in the extracts. However, the cells had no significant changes in their morphology. EndoBinder and MTA did not affect negatively the metabolism of the odontoblastic-like cells, showing it to be cytocompatible, irrespective of the used radiopacifier.

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Section: Discussionmentioning

confidence: 99%

Cytotoxicity of New Calcium Aluminate Cement (EndoBinder) Containing Different Radiopacifiers

et al. 2017

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“…Quanto mais alto o número atômico do elemento presente na composição do material, maior radiopacidade deve ser observada 17,24 .…”

Section: Discussionunclassified

“…Os valores de radiopacidade observados para o cimento Portland puro estão de acordo com estudos prévios 13,18 . O MTA Angelus  branco apresentou maior radiopacidade, com o valor de 4,71 mm de alumínio, em acordo com outros estudos 24,29,30 . Considerando-se que a radiopacidade favorece a visualização do material na radiografia, a associação do cimento Portland a óxido de bismuto, iodofórmio e carbonato de bismuto apresentou resultados adequados.…”

Section: Discussionunclassified

Análise físico-química do MTA e do cimento Portland associado a quatro diferentes radiopacificadores

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Duarte

et al. 2014

Rev. odontol. UNESP

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ResumoIntrodução: O Mineral Trióxido Agregado (MTA) é composto por cimento Portland (CP) e um radiopacificador (óxido de bismuto). Objetivo: Avaliar tempo de presa, solubilidade, pH, liberação de íons Cálcio e radiopacidade do cimento Portland puro ou associado a quatro radiopacificadores (sulfato de bário, carbonato de bismuto, óxido de bismuto e iodofórmio), comparados ao MTA branco (Angelus, Londrina, Brasil). Material e método: A proporção empregada CP/radiopacificador foi de 4:1 em peso, (80% de cimento Portland e 20% de radiopacificador Descritores: Mineral trióxido agregado; obturação retrógrada; materiais retrobturadores. AbstractIntroduction: Mineral Trioxide Aggregate (MTA) is composed of Portland cement (PC), and a radiopacifier (bismuth oxide). Objective: To evaluate the setting time, solubility, pH, calcium ion release and radiopacity of pure Portland cement and its association to four radiopacifiers, (Barium sulfate, bismuth carbonate, bismuth oxide and iodoform), and White MTA (Angelus, Londrina, Brazil). Material and method: The ratio CP/radiopacifier used was 4:1 by weight (80% Portland cement and 20% radiopacifier). The setting time was evaluated according the specification ADA 57. The solubility was analyzed according to ISO 6876/2001 specification. The pH was evaluated using a digital pHmeter and the release of Ca ++ ions by atomic absorption spectrophotometer. The radiopacity was measured in millimeters of aluminum (mm/Al). The results were submitted to ANOVA and Tukey tests using 5% of significance level. Result: Barium sulfate did not alter the final setting time of the PC. Observed radiopacity was less than the minimum recommended by ADA 57 and ISO 6876/2001 for CP and CP associated with barium sulfate. The PC associated with iodoform showed solubility above the 3% recommended by ISO 6876/2001. All materials provided alkalinization and promoted calcium ion release. Conclusion: Bismuth carbonate and bismuth oxide provided proper initial setting time, solubility, pH, calcium ion release and radiopacity when combined with CP.

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“…Mineral Trioxide Aggregate (MTA) has been considered as the ideal root-end filling material because of its low solubility, low cytotoxicity, good tissue tolerance and induction of mineralized tissue formation 1 . MTA is a white or grey powder which sets when there is moisture 2,3 .…”

Section: Introductionmentioning

confidence: 99%

“…MTA is a white or grey powder which sets when there is moisture 2,3 . MTA primarily consists of tricalcium silicate (3CaD.SiD 2 ), dicalcium silicate (2CaD.SiD 2 ) 4,5 as binder phases, and bismuth oxide to increase its radiopacity 1 . Calcium aluminate cement (CAC) has been studied as root-end filling material to overcome some MTA drawbacks such as the long setting time and its negative implications for the clinical needs [6][7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Influence of radiopacifier additives on calcium aluminate cement properties

et al. 2014

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The aim of this study was to determine the best radiopaque additive to be incorporated to calcium aluminate cement (CAC) to promote radiopacity. Measurements of optical density were carried out on white MTA and CAC with and without additives such as: polymeric dispersant, plasticizer and various radiopacifiers. The effects of the radiopacifying addition on some properties of CAC were also evaluated. The radiopacity value for CAC-Bi 2 D 3 (25%) was higher than the other radiopacifying agents tested. The addition of ZnD (25%) and 15%ZnD:10%Bi 2 D 3 increased the compressive strength of CAC, whereas for Bi 2 D 3 (25%) containing samples the strength was lower than for the CAC. The ZnD (25%) and 15%ZnD:10%Bi 2 D 3 additions also reduced the apparent porosity. CAC does not have sufficient radiopacity to be distinguished from adjacent anatomic structures, such as dental tissues and bone. The addition of 15%ZnD:10%Bi 2 D 3 can be suggested as the most suitable one to obtain the best compromise between good physical and mechanical properties and ideal radiopacity for clinical purposes.

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Radiopacity evaluation of root-end filling materials by digitization of images

Cited by 61 publications

References 26 publications

Cytotoxicity of New Calcium Aluminate Cement (EndoBinder) Containing Different Radiopacifiers

Cytotoxicity of New Calcium Aluminate Cement (EndoBinder) Containing Different Radiopacifiers

Análise físico-química do MTA e do cimento Portland associado a quatro diferentes radiopacificadores

Influence of radiopacifier additives on calcium aluminate cement properties

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