Morejón Lizette, Mendizábal Alonso Eduardo, García-Menocal José Angel Delgado, Ginebra María Pau, Aparicio Conrado, Mur Francisco Javier Gil, Marsal Montserrat, Davidenko Natalia, Ballesteros María E, Planell Josep Anton
Centro de Biomateriales, Universidad de La Habana, Habana, Cuba.
J Biomed Mater Res B Appl Biomater. 2005 Feb 15;72(2):345-52. doi: 10.1002/jbm.b.30166.
This work reports on the effect of the amount (0, 10, and 30 wt %) and type of HA powder incorporated into an acrylic bone cement on the tensile properties, compression properties, and fracture toughness. The three different types of HA powders used were synthesized in the laboratory and coated with a silane agent prior to incorporation into the cement powder, and differed in particle size, water content, surface area, and crystallinity. It was found that the inclusion of any type of HA powder led to an increase in the tensile modulus (ET), but all the other mechanical properties of the cement decreased (relative to the values of the unfilled cement). The increase in ET is attributed to the good adhesion between the filler and the cement matrix, which is due to the silane coating agent. The decrease in the other mechanical properties may be a consequence of HA powder agglomeration and porosity. Hydroxyapatite morphology and crack-growth mechanisms were analyzed by scanning electronic microscopy (SEM).
本研究报告了掺入丙烯酸骨水泥中的羟基磷灰石（HA）粉末的量（0、10和30 wt%）及类型对拉伸性能、压缩性能和断裂韧性的影响。所使用的三种不同类型的HA粉末是在实验室合成的，并在掺入水泥粉末之前用硅烷剂进行了包覆，它们在粒径、含水量、表面积和结晶度方面存在差异。研究发现，掺入任何类型的HA粉末都会导致拉伸模量（ET）增加，但水泥的所有其他力学性能均下降（相对于未填充水泥的值）。ET的增加归因于填料与水泥基体之间的良好粘附，这是由硅烷包覆剂导致的。其他力学性能的下降可能是HA粉末团聚和孔隙率造成的结果。通过扫描电子显微镜（SEM）分析了羟基磷灰石的形态和裂纹扩展机制。
