文献类型：期刊文献

英文题名：Biocompatibility and osteogenicity of degradable Ca-deficient hydroxyapatite scaffolds from calcium phosphate cement for bone tissue engineering

作者：Guo, Han[1,2];Su, Jiacan[3];Wei, Jie[1,2];Kong, Hang[4];Liu, Changsheng[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Engn Res Ctr Biomed Mat, Minist Educ, Shanghai 200237, Peoples R China;[3]Second Mil Med Univ, Changhai Hosp, Dept Orlhopaed, Shanghai 200433, Peoples R China;[4]Tongi Univ, Sch Stomatol, Dept Oral & Maxillofacial Surgd, Shanghai 200072, Peoples R China

年份：2009

卷号：5

期号：1

起止页码：268

外文期刊名：ACTA BIOMATERIALIA

收录：;EI(收录号：20215111335949);WOS:【SCI-EXPANDED(收录号:WOS:000261922400028)】；

基金：The authors appreciate financial support from the National Science Fundation for Distinguished Young Scholars of China (Grant No. 20425621), the Major State Basic Research Program of China (No. 2005CCA01000), the Basic Research Foundation of the Shanghai Science and Technology Committee (05DJ14005) and Nano special program of Science and Technology Development of Shanghai (No. 0652nm021).

语种：英文

外文关键词：Ca-deficient hydroxyapatite scaffold; Mesenchymal stem cells; Biocompatibility; Osteogenesis; Bone tissue engineering

摘要：Ca-deficient hydroxyapatite (CDHA) porous scaffolds were successfully fabricated from calcium phosphate cement (CPC) by a particle-leaching method. The morphology, porosity and mechanical strength as well as degradation of the scaffolds were characterized. The results showed that the CDHA scaffolds with a porosity of 81% showed open macropores with pore sizes of 400-500 mu m. Thirty-six per cent of these CDHA scaffolds were degraded after 12 weeks in Tris-HCl solution. Mesenchymal stem cells (MSCs) were cultured, expanded and seeded on the scaffolds, and the proliferation and differentiation of MSCs into osteoblastic phenotype were determined using MTT assay, alkaline phosphatase activity and scanning electron microscopy. The results revealed that the CDHA scaffolds were biocompatible and had no negative effects on the MSCs in vitro. The in vivo biocompatibility and osteogenicity of the scaffolds were investigated. Both CDHA scaffolds and MSC/scaffold constructs were implanted in rabbit mandibles and studied histologically. The results showed that CDHA scaffolds exhibited good biocompatibility and osteoconductivity. Moreover, the introduction of MSCs into the scaffolds dramatically enhanced the efficiency of new bone formation, especially at the initial stage after implantation (from 2 to 4 weeks). However, the CDHA scaffolds showed as good biocompatibility and osteogenicity as the hybrid ones at 8 weeks. These results indicate that the CDHA scaffolds fulfill the basic requirements of bone tissue engineering scaffold. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.