1Periodontal flap surgery: incision design and selection of valvesTAN Li-si, PAN Ya-pingSYMPOSIUM193-1972Periodontal osseous reconstructive surgeryWANG Qin-taoSYMPOSIUM197-2013Clinical diagnosis and treatment strategy in periodontal regenerative surgeryXU Li, LI yiSYMPOSIUM201-2054Crown lengthening surgeryLUAN Qing-xianSYMPOSIUM205-2075Surgical treatment for furcation-involved molars and its prognosisZHOU Qi, GE Shao-hua, YANG Pi-shanSYMPOSIUM208-2116Mucogingival surgeryLIN Chong-tao, LI Hong-yanSYMPOSIUM212-2167Factors involved in the change of gingival margin position after periodontal surgeryZHANG Fu, TANG Xiao-linEXPERT LECTURE217-2208Relationship between genetic polymorphism of MTHFE A1298C and nonsyndromic cleft lip with or without cleft palate in Shanxi provinceLIU Ming, NAN Xin-rong, YUAN Guang-huiORIGINAL CONTRIBUTIONS221-2259Maternal periodontal inflammation and IL-2 levels of gingival crevicular fluid and saliva and serum in the third trimesterZHAO Yun, XIAO Mei, SUN Guo-qiang, YANG Li, ZHAO Lei, TANG Fei, DU Min-quanORIGINAL CONTRIBUTIONS226-229,23210In vitro evaluation of antibacterial effect of self-made chlorhexidine gel on Enterococcus faecalisWANG Xue-mei, ZHU Xiao-hua, QIU Li-hong, YU Jing-taoORIGINAL CONTRIBUTIONS230-23211Epidemiological investigation of temporomandibular disorders in university students of Shanxi nationalitySHI Tao-tao, YANG Lian-ping, SUN Ying, GUO Li-chunORIGINAL CONTRIBUTIONS233-23512Clinical observation of etomidate intravenous anesthesia maintenance for the parotid tumor resectionLIU Shi-wei, LI Chuang, ZHANG QianORIGINAL CONTRIBUTIONS236-23913Chemokines in axial chemotactic effect of mesenchymal stem cells towards tumorCHANG Mao-linREVIEW242-24514Research advance of root canal sealerWANG FenREVIEW246-24915Semiconductor diode laser and its application to periodontal surgical treatmentZHANG Xin-yue, SUN Chun-yan, CHEN XueREVIEW250-253 