In vitro bioactivity assessment and mechanical properties of novel calcium titanate/borosilicate glass composites

作者：Villalpando Reyna A^*; Cortes Hernandez D A; Gorokhovsky A; Almanza Robles J M; Escobedo Bocardo J C

来源：Ceramics International, 2011, 37(5): 1625-1629.

DOI：10.1016/j.ceramint.2011.01.034

• Borosilicate glasses
• Potassium titanate
• Calcium titanate
• Apatite formation
• Bioactive composites

Bioactive calcium titanate/borosilicate glass composites were developed. Powder mixtures of borosilicate glass and 10, 20 or 30 wt% of potassium polytitanate particles were uniaxially pressed and sintered at 850 degrees C for 1 h. After heat treatment the reaction between potassium polytitanate and borosilicate glass produced composites consisting of calcium titanate particles embedded in a B-rich amorphous phase. For the in vitro bioactivity assessment sintered samples were immersed in a simulated body fluid (SBF) for 21 days under physiological conditions of pH and temperature. The compressive strength of the composites was also evaluated. A homogeneous and thick apatite layer was formed on all the materials tested. Furthermore, an appropriate compressive strength was observed (68-85 MPa). These results indicate that these composites are potential materials for bone tissue replacement and regeneration.

• 出版日期2011-7