1Evolution analysis of cytolethal distending toxin in A.actinomycetemcomitansSUN Jing-hua, ZHANG Chen, YU Gang, HOU Ben-xiang493-498,5352HMGB1 induced by mechanical stress promotes the migration of human periodontal ligament cells through regulating matrix metalloproteinasesYU Xiao-qin, GAO Jin-yu, LIU Hua499-5053The effects of additional fluoride on the osmotic pressure of DMEM and its influence on the morphology of ameloblastsZHANG Le, CAO Wei-jing, GAO Jiang-hong, DONG Ning, RUAN Jian-ping506-5124The effects of inorganic filler content on the double bonds conversion of n-HA composite resinWANG Shuang, WANG Qing-shan, LIU Guang-yan513-515,5205An in vitro study on wear properties of zirconia ceramicRUAN Jian-yong, ZHANG Shao-feng, ZHANG Zhen-zhen, WU Wei-liang, YE Xiao-ang516-5206Micro-CT analysis of the morphology of root canal systems of the mandibular third molarsYUAN Dong-ying, TANG Ying, GU Yong-chun521-5247Clinical observation of platelet rich fibrin in periodontal bone graft surgeryLEI Chao-feng, WANG Ying-bo, XU Yi525-5288Comparison of theoperation time and clinical efficacy of SureFil SDR, glass ionomer cement and 3M composite resin in repairingClass Ⅰ cavityof Deciduous Molars cariesZHANG Cui-mei, WEI Mei-rong, BAI Jian-wen529-5319Clinical effects of Nickel titanium instrument combined with ultrasonic irrigation in root canal retreatmentWANG Xiao-hua, WANG Xia532-53510The role of signaling network in tooth developmentLIU Hao536-54011Advance of the study on cold flowable gutta perchaHU Cheng541-544,50512The progress of the study on psychological and health prevention of oral patientsREN Yu-shu545-550,52813Study on the reform for the education and test of Prosthodontics for the improvement of the abilities of practicing dentistsZHANG Ling, TIAN Min, YU Hao-han, LI Fang, ZHANG Yu-mei, ZHANG Shao-feng, CHEN Ji-hua551-55414@@封3