1. State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institute of Ceramics Chinese Academy of Sciences No.1295 Dingxi Road Shanghai 200050 P. R. China
2. Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences No,19(A) Yuquan Road Beijing 100049 P. R. China
3. Centre for Translational BoneJoint and Soft Tissue ResearchUniversity Hospital Carl Gustav Carus and Faculty of Medicine of Technische Universität Dresden Fetscherstr. 74 01307 Dresden Germany