1Dental Ecofilm and Caries(2)A review of caries research in last centuryYUE Song-ling543-5492Construction and identification of proeukaryotic expression plasmid of L type calcium channel α1 D subunit specific gene of human odontoblast550-5533A study of recombinant dunaliella salina vaccine against dental caries Ⅱ——Comparison of effect of two promoters in transformation ofDunaliella salina with the chimera gene encoding SBR-CT△A1LIU Hong-yan, LING Jun-qi, MAI Sui554-5584Role of Hertwig's epithelial root sheath in the developing cementumYU Xi-jiao, LI Shu, XIAO Chang-jie, LIU Zong-xia, YU Lan559-5625Scanning electron microscopic observation of permanent dentine surface aftercarisolv chemo-mechanical caries removalHU Ming, WU You-nong, LIANG Rui-zhen563-5666Effects of electromagnetic radiation and bad habits on periodontal healthLI Feng-hua, LIU Hong567-5697Measurement of pre- and post bite-opening cast with inclined biteplateWANG Feng, ZHANG Zhao-fen, DUAN Yin-zhong, LIN Song-shan570-5728Therapeutic effect of Endomethasone root canal sealer in one-off root canal therapy and pulpectomy in short termXU Min, ZOU Xiao-xian573-5759Clinic analysis of avulsed permanent incisors: A report of 18 casesYI Fei-zhou, LI Xiao-fang576-57810An experimental study of PDLLA-β-TCP membrane in guiding tissue regenerationWEI Shu-sheng, WANG Shuo-zhi, LI Yuan579-58111Value of bleeding on probing marginal gingiva method in clinicLI Peng, SHA Yue-Qin, HE Lu582-58512Action of fibroblast growth factors in tooth development592-59513Main points of study on Hertwig's epithelial root sheath596-599