METHODS: In this article, the authors review the active field of research into new cell sources that are being investigated for use in bone tissue engineering. These include adipogenic, muscle, intraoral, dermal, and peripheral blood stem cells. The concept of "cell guidance," where cells are induced to home into a scaffold without the need for prior cell seeding, is also discussed. RESULTS: These new cell sources have the advantages of decreased morbidity during harvesting from patients and increased availability compared with traditional sources of cells for bone tissue engineering, such as end organ-derived osteoblasts, bone marrow mesenchymal stem cells, and periosteal progenitor cells. CONCLUSION: The move beyond common sources of cells is perhaps the single most important recent development in bone tissue engineering research

试验方法：在这篇文章中，作者们回顾了正用于骨组织探究的关于新细胞源的研究的积极方面。这当中包括成脂细胞，肌细胞，表皮细胞，外周血干细胞。关于“细胞引导”的概念，即细胞在没有前体细胞的条件下被诱导成细胞骨架在本文中已有所讨论。
试验结果：从病人方面获得的资料显示，这些新的细胞源较之传统细胞源在骨组织研究中的作用，具有降低发病和增加有效性的优点，比如终止器官衍生的格根包尔氏细胞，骨髓间质干细胞，和骨膜祖细胞。
结论：在通常的细胞源之外的细胞运动（理解成转换）也许是新近骨组织研究的发展中最重要的独立因素。

有些句子翻译过来总觉得别扭，不是很好理解~~
凑合看吧o(∩_∩)o...