1Apical transportation during root canal preparationYU Xiao-qing, XUE MingSYMPOSIUM641-6442Matched-taper single cone obturation techniqueWANG Chu-yu, XUE MingSYMPOSIUM645-6483Analysis of obturation to lateral canalLIU Yu-fei, XUE MingSYMPOSIUM648-6514Application of ultrasonic irrigation in root canal therapyWANG Xing-bo, ZHAN Fu-liangSYMPOSIUM651-6565Method and effectiveness of intracanal gutta-percha removingKANG Guo-peng, YU Jing-taoSYMPOSIUM656-6596Evaluation and analysis of orthodontic treatment effect in BeijingZHANG Hai-ping, LI Yue, LI Song, FANG Dong-yu, WANG Hong-mei, SU Jing, MA Lin-shaORIGINAL CONTRIBUTIONS660-6637Expression and clinical significance of p15 protein, mRNA in oral squamous cell carcinomaCHEN Yue-lai, LIU Cheng-minORIGINAL CONTRIBUTIONS664-6678Comparison of the effects between FR Ⅱ appliance and activator in the treatment of children's Angle class Ⅱ division 1 malocclusionJIN Jie, CHEN Yu-wen, ZHU Yu, WANG Jian, YAN Xiu-linORIGINAL CONTRIBUTIONS668-6719Clinical effect of residual root on removable partial denture adding artificial toothLIU Wei-li, ZHANG Ying-qiORIGINAL CONTRIBUTIONS672-67410Reduction of zygomatic arch M-shaped fracture with computer-assisted navigation system by intraoral approachYANG Rong-tao, LI Zhi, LI Zu-bingORIGINAL CONTRIBUTIONS675-67811Detection and significance of changes of IL-8, IL-10 level in serum and gingival crevicular fluid in patients with chronic periodontitis and coronary heart disease before and after basic periodontal therapyLI Feng, SUN Xiao-ju, SHEN Guo-han, XIE HongORIGINAL CONTRIBUTIONS679-68212Relatively close anode distance projection of the posterior maxillary teethGUO Xiao-long, WANG Jia-zhu, SHI Xiao-wei, WANG Zhao-wu, GUO BinORIGINAL CONTRIBUTIONS683-68613Research progress in medium storage artificial aging test of resin composite and the influencing factorsYU Jian, GONG Hai-huan, FENG Dan, SONG Ai-yang, JIN JieREVIEW687-69014Periodontal attachment loss during orthodontic treatment in adultsSHAO Yi-tingREVIEW691-69315Treatment methods for Angle class Ⅱ 2 malocclusionJIANG Yang-yangREVIEW694-69816The application of nano antibacterial materials in orthodontic treatmentPAN Ying, SUN Teng, LU Ming-xingREVIEW699-70117One case report of internal root resorption of maxillary central incisorCASE REPORT702-70418@@671,686,704 