author = "Oliveira, Ivone Regina de and Vieira, Gabriela do Vale and Santos, 
                         Kennedy Wallace dos and Raniero, Leandro Jos{\'e} and 
                         Castro-Raucci, Larissa Moreira and Oliveira, Paulo Tambasco de and 
                         Fornari, Celso Israel and Pandolfell, Victor Carlos",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade de S{\~a}o Paulo (USP)} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal de S{\~a}o Carlos 
                title = "Improving the radiopacity of calcium aluminate cement based 
              journal = "Materials Research",
                 year = "2018",
               volume = "21",
               number = "2",
                pages = "e20170599",
             keywords = "calcium aluminate blends, bioactivity, osteoblastic cell 
                         viability, radiopacity.",
             abstract = "The radiopacity of CAC-based compositions containing additives 
                         (ZnO, Ag and Bi2O3) was evaluated by optical density measurements, 
                         cold crushing strength, apparent porosity, pore size distribution, 
                         in vitro apatite-formation ability (bioactivity) and cell 
                         viability. The bioactivity was assessed via pH and calcium 
                         concentration measurements in simulated body fluid (SBF) for 
                         samples previously treated or not with sodium silicate (SS) 
                         solution. The surface of the samples after treatment was analyzed 
                         by scanning electron microscopy, energy dispersive X-ray analysis 
                         and confocal Raman spectroscopy. Cell viability was evaluated by 
                         MTT and alkaline phosphatase (ALP) activity Radiopacity results 
                         confirmed that compositions containing ZnO-Ag (25:1 wt%) and 
                         ZnO-Bi2O3 (15:10 wt%) presented suitable values of radiopacity (> 
                         3 mmAl) The identification of calcium and mainly phosphorus by 
                         EDX, highlighted the generation of an apatite-like layer on the 
                         compositions' surface after immersion in SBF or SBF/SS. CAC-blend 
                         containing 25 wt% ZnO, ZnO-Ag and ZnO-Bi2O3 presented slightly 
                         lower cell viability compared to the positive control.",
                  doi = "10.1590/1980-5373-MR-2017-0599",
                  url = "http://dx.doi.org/10.1590/1980-5373-MR-2017-0599",
                 issn = "1516-1439",
             language = "en",
           targetfile = "oliveira_improving.pdf",
        urlaccessdate = "13 jun. 2021"