参考文献

[1] Chen ST, Wilson TG Jr, Hammerle CH. Immediate or early placement of implants following tooth extraction: review of biologic basis, clinical procedures, and outcomes[J]. Int J Oral Maxillofac Implants, 2004, 19(Suppl):12-25．

[2] Araújo M, Sukekava F, Wennstrom J, et al. Ridge alterations following implant placement in fresh extraction socket: an experimental study in the dog[J]. J Clin Periodontol, 2005, 32:645-652.(https://www.daowen.com)

[3] Yu B, Wang Z. Effect of concentrated growth factors on beagle periodontal ligament stem cells in vitro [J]. Mol Med Rep, 2014,9(1):235-242.