1Basic principles on preventing tooth extraction complicationsLI Yong-feng, ZHOU Hong-zhi, HU Kai-jinSYMPOSIUM513-5162Causes and prevention of mental nerve, buccal nerve and the nasopalatine nerve injuryDENG Tian-ge, ZHOU Hong-zhi, HU Kai-jin, QIN Rui-fengSYMPOSIUM517-5203Causes and prevention of lingual nerve injury.WU Di, HU Kai-jin, ZHOU Hong-zhi, DING Yu-xiangSYMPOSIUM521-5234Causes and prevention of inferior alveolar nerve injuryZHANG Zong-min, HU Kai-jin, ZHOU Hong-zhiSYMPOSIUM523-5275Ultrastructural and Ca, P changes of the regenerated bone after alveolar distraction osteogenesis in canine modelZHOU Miao, CHE Yue-juan, HUANG Dai-ying, PIAO Zheng-guo, YU Xiao-wei, CHEN Song-lingORIGINAL CONTRIBUTIONS528-5316Effect of periodontal initial therapy on IL-1β and RANKL-OPG in gingival crevicular fluid of patients with chronic periodontitis and secondary occlusal traumaZHANG Ming-ye, WANG Feng, YANG Rui-hua, WANG Peng-cheng, LIN Song-shanORIGINAL CONTRIBUTIONS532-5377Study on expression of Caspase-3 in the tissue of labial glands of patients with primary Sjogren's syndromeBAO Hui-qi, ZHANG Ying, PENG Chuan-yang, KANG Yuan-yuanORIGINAL CONTRIBUTIONS538-5408Expression of PTTG1 in oral squamous cell carcinoma and its promotion for EMTYING Xiao-xia, XIANG Bin, DONG HuiORIGINAL CONTRIBUTIONS541-5449The efficacy of treatment of intralesional injection of pingyangmycin with different concentrations for lymphatic malformations in oral and maxillofacial regionXU Da-peng, XUE Lei, TONG Shuang, CHENG Chen, GONG He, WANG Hong-wei, WANG Xu-kaiORIGINAL CONTRIBUTIONS545-54810Study on the clinical effect of the treatment of extracting the impacted third molar for college students with temporomandibular disordersGE Guang-hua, LI Jin-fang, JIANG Xiao-ping, LI Man-wenORIGINAL CONTRIBUTIONS549-55111Quantitative analysis of matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-2 in gingival crevicular fluid of replanted avulsed toothHU Bi-bo, REN Xue-rui, WEI Li-min, WANG Jian-fengORIGINAL CONTRIBUTIONS552-55412The diagnostic value of salivary ECT in patients with non-neoplastic salivary gland diseasesCHANG Meng-zu, XI Hong, WU Chuan-bin, ZHOU QingORIGINAL CONTRIBUTIONS555-55813@@559-56014Recent research progress of the correlation between HMGB1 and periodontal disease, HMGB1 and diabetes-associated periodontitisSHAN WeiREVIEW561-56515Advances on the biomechanical evaluation methods of dental implantZHANG BoREVIEW566-57116Research progress in infected root canalsHUANG Yan-hua, GE Jiu-yuREVIEW572-576 