Este estudo avaliou a citotoxicidade de um cimento de aluminato de cálcio (EndoBinder) contendo diferentes radiopacificadores, Bi2O3, ZnO ou ZrO2, comparativamente ao trióxido mineral agregado (MTA). Seguindo a norma ISO 10993-12:2012 (E), 0,2 g de cada cimento foi aplicada em insertos transwell, que foram colocados em placas de cultura de 24 wells contendo 1 mL de meio de cultura (DMEM). Após 24 h de incubação, os extratos (DMEM contendo componentes liberados dos cimentos) foram aplicados sobre células pulpares imortalizadas MDPC-23. Viabilidade celular (teste de MTT), atividade da fosfatase alcalina (ALP), produção de proteína total e a morfologia das células (Microscópio Eletrônico de Varredura - MEV) foram avaliadas. Um volume de 50 µL do extrato foi utilizado para determinar, através de Espectroscopia de Energia Dispersiva (EDS), os elementos químicos liberados pelos cimentos. Os seguintes grupos foram estabelecidos (n=6): NC - controle negativo (sem tratamento); EB - EndoBinder sem radiopacificador; EBBO - EndoBinder+Bi2O3; EBZnO - EndoBinder+ZnO; EBZrO - EndoBinder+ZrO2 e WMTA - MTA branco. Os dados foram submetidos à análise estatística (teste de Kruskal-Wallis, nível de significância=5%). Células expostas às diferentes versões de EndoBinder apresentaram pequena redução na viabilidade, produção de proteína total e atividade da ALP, com valores semelhantes aos grupos NC e WMTA (p>0,05). Diversos elementos (C, O, Na, Al, P, Si, Cl, Bi, K) liberados pelos cimentos foram detectados nos extratos. Entretanto, as células não apresentaram alterações significativas em sua morfologia. EndoBinder e MTA, não afetaram negativamente o metabolismo das células odontoblastóides, mostrando-se citocompatíveis, independente do radiopacificador utilizado.
Article • Braz. Dent. J. 28
(1)
• Jan-Feb 2017 • https://doi.org/10.1590/0103-6440201701023 linkcopiar
Cytotoxicity of New Calcium Aluminate Cement (EndoBinder) Containing Different Radiopacifiers
Autoria
person Claudia Huck
schoolDepartment of Restorative Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Restorative Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
person Hernane da Silva Barud
schoolMedical-Chemistry Laboratory and Regenerative Medicine (QUIMMERA), Centro Universitário de Araraquara, Araraquara, SP, BrazilCentro Universitário de AraraquaraBrazilAraraquara, SP, BrazilMedical-Chemistry Laboratory and Regenerative Medicine (QUIMMERA), Centro Universitário de Araraquara, Araraquara, SP, Brazil
person Fernanda Gonçalves Basso
schoolDepartment of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
person Carlos Alberto de Souza Costa
schoolDepartment of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
person Josimeri Hebling
schoolDepartment of Orthodontics and Pediatric Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Orthodontics and Pediatric Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
person Lucas da Fonseca Roberti Garcia
schoolDepartment of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, BrazilUniversidade Federal de Santa CatarinaBrazilFlorianópolis, SC, BrazilDepartment of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
Correspondence: Dr. Lucas da Fonseca Roberti Garcia, Avenida Madre Benvenuta, n° 388, apto. 713, Bairro Trindade, 88036-500 Florianópolis, SC, Brasil. Tel: +55-48-3721-9549/99173-0776. e-mail:
drlucas.garcia@gmail.com
drlucas.garcia@gmail.com
SCIMAGO INSTITUTIONS RANKINGS
Department of Restorative Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Restorative Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
Medical-Chemistry Laboratory and Regenerative Medicine (QUIMMERA), Centro Universitário de Araraquara, Araraquara, SP, BrazilCentro Universitário de AraraquaraBrazilAraraquara, SP, BrazilMedical-Chemistry Laboratory and Regenerative Medicine (QUIMMERA), Centro Universitário de Araraquara, Araraquara, SP, Brazil
Department of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Physiology and Pathology, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
Department of Orthodontics and Pediatric Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, BrazilUniversidade Estadual PaulistaBrazilAraraquara, SP, BrazilDepartment of Orthodontics and Pediatric Dentistry, Araraquara Dental School, UNESP - Universidade Estadual Paulista, Araraquara, SP, Brazil
Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, BrazilUniversidade Federal de Santa CatarinaBrazilFlorianópolis, SC, BrazilDepartment of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
Figuras | Tabelas
imageFigure 1 Graphic representation of cell viability (A); total protein production (B) and ALP activity (C), after contact of odontoblast-like MDPC-23 cells with the extracts from the tested cements. The values (in percent) were calculated from the control group, considered 100%, and are presented as median and percentiles (P25 and P75). Groups identified with equal letters showed no statistically significant difference (Kruskal-Wallis, p<0.05). n=6. open_in_new

imageFigure 2 Representative photomicrographs of the MDPC-23 cells morphology observed by SEM; original magnification, 1000´. A: Negative Control: Large number of MDPC-23 cells with wide cytoplasm (circle), organized in epithelioid nodule, covering a large part of the glass substrate. B: EndoBinder: In the same way as observed in NC group, a large number of cells were found adhered to the glass substrate (circle). However, it was possible to observe small cement particles deposited on the glass slide and cells (arrows). C: EndoBinder+Bi2O3: MDPC-23 cells with normal morphology (circle), such as observed in NC group. Cement residues may be seen on the cells and substrate. D: EndoBinder+ZnO - In this group it was possible to observe cells adhered to the glass substrate. Some cells showed reduction in their normal size, due to shrinkage of the cytoplasm (arrow). E: EndoBinder+ZrO2 - Large quantity of cells with wide cytoplasm, covering almost the entire glass substrate on which they were previously cultivated. Cement residues were observed on the cells and substrate. F: White MTA - In this Group, the authors could observe findings similar to those of the other groups, in which cells with wide cytoplasm were organized in an epithelioid nodule. open_in_new

imageFigure 3 Photomicrographs (left) and respective graphs (right) representative of SEM/EDS analyses (original magnification, 1000´) of the chemical elements in the extracts from the different tested cements. A: Negative Control: Note the presence of only some small particles (arrow) with reference to the chemical components in the culture medium (graph). B: EndoBinder - Large quantity of cement particles dispersed within the extract and deposited on the silicon substrate (circle). Main chemical elements detected in the sample (graph). C: EndoBinder+Bi2O3: Cement particles (circle) deposited on the silicon substrate. D: EndoBinder+ZnO: In this group, a smaller quantity of dispersed particles could be observed (arrows). In the graph, note the main chemical elements detected, but element Ca was not identified, differently from the other EndoBinder groups. E: EndoBinder+ZrO2: Cement residues (circle). Within the cement components, the authors were able to detect the presence of C, O, Na, Al, P, S, Cl, K and Ca (graph). F: White MTA: In this group, note the small quantity of particles dispersed and deposited on the silicon substrate (arrow), in comparison with the EndoBinder groups. In the graph, note the main chemical elements detected. open_in_new

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