1Ejeil AL, Igondjo-Tchen S, Ghomrasseni S,et al. Expression of matrix metalloproteinases(MMPs) and tissue inhibitors of metalloproteinases(TIMPs) in healthy and diseased human gingiva. J Periodontol,2003,74:188-195.
2Nishikawa M, Yamaguchi Y, Yoshitake K, et al. Effects of TNF alpha and prostaglandin E2 on the expression of MMPs in human periodontal ligament fibroblasts. J Periodontal Res,2002,37:167-176.