SOL-GEL SYNTHESIS OF WHITE MINERAL TRIOXIDE AGGREGATE WITH POTENTIAL USE AS BIOCEMENT

作者：Voicu G^*; Badanoiu A I; Ghitulica C D; Andronescu E

来源：Digest Journal of Nanomaterials and Biostructures, 2012, 7(4): 1639-1646.

• White mineral trioxide aggregate
• Biocement
• Sol-gel synthesis
• In-vitro test

White mineral trioxide aggregate (WMTA) for dental applications was synthesised by sol-gel route due to the advantages of this method as compared with the conventional one i.e. lower thermal treatment temperatures and higher purity of the product. Tetraethylorthosilicate (C6H16O3Si - TEOS) and soluble salts i.e. Ca(NO3)(2)center dot 4H(2)O and Al(NO3)(3)center dot 9H(2)O were used as precursors for WMTA synthesis. The material was obtained by a single step thermal treatment at 1200 degrees C and 1350 degrees C, for 30 minutes. Thermal analysis (DTA/TG/DTG), X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to investigate the WMTA synthesis. The biocompatibility was assessed in vitro, by soaking of WMTA powder in simulated body fluid (SBF) for 14 days. The XRD results indicated that one of the main mineralogical phases formed was hydroxyapatite, compound with good bioactivity.

• 出版日期2012-12