Influence of radiopacifier additives on calcium aluminate cement properties

Materials Research

Ivone Regina De Oliveira²  Talita Luana De Andrade²  Daniele Coelho Matsuo²  Renata Martins Parreira²  Marcos Jacobovitz¹  Victor Carlos Pandolfelli¹ 

[1] ,University of Vale do Paraíba - Univap Institute for Research and Development São José dos Campos SP ,Brazil

关键词: dental cement;    radiopacity;    physical and mechanical properties;   

DOI  :  10.1590/1516-1439.282214

来源: SciELO

【 摘 要 】

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-Bi2O3 (25%) was higher than the other radiopacifying agents tested. The addition of ZnO (25%) and 15%ZnO:10%Bi2O3 increased the compressive strength of CAC, whereas for Bi2O3 (25%) containing samples the strength was lower than for the CAC. The ZnO (25%) and 15%ZnO:10%Bi2O3 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%ZnO:10%Bi2O3 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.

【 授权许可】

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