1The relationship between temporomandibular joint ankylosis and condylar fracturesLONG XingSYMPOSIUM129-1322Prevention of traumatic temporomandibular joint ankylosisJIANG Xin, HU Kai-jinSYMPOSIUM132-1353Classification and treatment of temporomandibular joint ankylosisZHOU QingSYMPOSIUM136-1394Complications after treatment for the condylar fracture and analysis of their causesCAI Yi-hua, HE Dong-meiEXPERTS LECTURE140-1435Three-dimensional finite element analysis of the different crown-root ratio of implant-borne prothesis in repairing the first molar of mandibularORIGINAL CONTRIBUTIONS144-1476Variation analysis of miRNA expression during osteogenic differentiation of human periodontal ligament stem cellsZHANG Yan, ZHEN Lei, GUO Jiang-liORIGINAL CONTRIBUTIONS148-1527Pancherz analysis in evaluating the hard tissue change of Class Ⅱ 1 malocclusion treated by Twin-block applianceWANG Qian, ZUO Yan-ping, DONG Fu-shengORIGINAL CONTRIBUTIONS153-1578Study on the changes of subgingival Prevotella intermedia of dental implant within one yearWANG Jue, JIAO Yan-jun, JIN En-long, YAN LiangORIGINAL CONTRIBUTIONS158-1619Clinical appliance of ball-socket attachment at distal-extended tooth missing: evaluation of the effect in 18 casesWANG Wei, LI Jia-jia, HONG Yan-song, AI Hong-junORIGINAL CONTRIBUTIONS162-16410Prevalence of deciduous tooth caries in 5-year-old children in Changyang Tujia Autonomous District of Hubei provinceFANG Ji-rong, CHEN Bo, ZHENG Chun-yu, LIU Jian-jun, LV Juan-juan, LU Xu-yangORIGINAL CONTRIBUTIONS165-16711Analysis on pathogenic bacteria of oral and maxillofacial multiple space infections: a retrospective study of 46 patientsPANG Bao-xing, FENG Yuan-yong, LI Feng-meiORIGINAL CONTRIBUTIONS168-17012Comparative study of three temporary restorative materials on crown sealingZHAO Xu-dong, WANG Xin, ZHOU Yu-caiORIGINAL CONTRIBUTIONS171-17313Expression and correlation of PTEN, MMP-7 and VEGF in oral squamous cell carcinomaSUN Xiao-ju, ZUO Hai-yan, XIE Hong, DENG WeiORIGINAL CONTRIBUTIONS174-17614Research progress of oral physiological function changes after orthognathic surgeryYI XinREVIEW179-18215Research progress of the soft tissue changes following skeletal crossbite surgeryDUAN Yong-huaREVIEW183-18616Research progress of crown lengthening surgery and orthodontic traction in retaining residual rootsMA Chun-liangREVIEW187-190 