Wu Chengtie, Chang Jiang
Biomaterials and Tissue Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
J Biomater Appl. 2006 Oct;21(2):119-29. doi: 10.1177/0885328206057953. Epub 2006 Jan 27.
Akermanite (Ca(2)MgSi(2)O(7)) ceramics are prepared by sintering akermanite powder compacts at 1370 C for 6 h. The sintering behavior and mechanical properties of akermanite ceramics are investigated. The bioactivity of akermanite ceramics is evaluated by soaking in simulated body fluid (SBF), and hydroxyapatite (HAp) formation on the surface of akermanite ceramics after soaking is characterized by X-ray diffraction (XRD), energy dispersive spectrometry (EDS), and scanning electron microscopy (SEM). The results show that the bending strength of akermanite ceramics can reach 176 MPa, the fracture toughness is 1.83 MPa m(1/2), and akermanite ceramics can induce HAp formation on their surface when soaked in SBF. Our results indicate that akermanite ceramics are bioactive, and possess improved mechanical properties compared with those of HAp ceramics and may be used as bioactive implant materials.
钙镁黄长石（Ca₂MgSi₂O₇）陶瓷通过在1370℃下烧结钙镁黄长石粉末压块6小时制备而成。研究了钙镁黄长石陶瓷的烧结行为和力学性能。通过浸泡在模拟体液（SBF）中来评估钙镁黄长石陶瓷的生物活性，浸泡后利用X射线衍射（XRD）、能谱分析（EDS）和扫描电子显微镜（SEM）对钙镁黄长石陶瓷表面形成的羟基磷灰石（HAp）进行表征。结果表明，钙镁黄长石陶瓷的抗弯强度可达176MPa，断裂韧性为1.83MPa·m¹/²，浸泡在SBF中时，钙镁黄长石陶瓷表面可诱导形成HAp。我们的结果表明，钙镁黄长石陶瓷具有生物活性，与HAp陶瓷相比，其力学性能有所改善，可作为生物活性植入材料使用。
