3Weinberg MA, Bral M. Laboratory animal model in periodontology[J]. J Clinc Periodontol, 1999, 26(6): 335-340
4Wikesjo UE, Lira WH, Thomson RC, et al. Periodontal repair in dogs: Evaluation of bioabsorbable space-providing macroporous membrane with recombinant human bone morphogeneticprotein-2[J]. J Periodon, 2003, 74(5): 635- 647
5Seo BM, Miura M, Gronthos S, et al. Investigation of multipotent postnatal stem cells from human periodontal ligament[J]. Lancet, 2004, 364:149-155
6Gronthos S, Mrozik K, Shi S, et al. Ovine periodontal ligament stem cells: isolation, characterization, and differentiationpotential[J]. Calcif Tissue Int, 2006, 79: 310- 317
7Techawattanawisal W, Nakahama K, Komaki M, et al. Isolation of multipotent stem cells from adult rat periodontal ligament by neurosphere-forming culture system [J]. Biochem and Biophys Res Comm, 2007:357:917-923
8Nagatomo K, Komaki I, Sekiya Y, et al. Stem cell properities of human periodontal ligament cells [J]. J Periodontal Res, 2006, 41: 303-310
9Gay IC, Chen S, MacDougall M. Isolation and characterization of multipotent human periodontal ligament stem cells[J]. Orthod Craniofacial Res, 2007,10:149-160
10Bruder SP, Horowitz MC, Mosca JD, et.al. Monoclonal antibodies reactive with human osteogenic cell surface antigens [J1. Bone 1997: 21:225-235