1Treatment of posterior crossbite malocclusions by extraction therapyDUAN Yin-zhong, SHEN Shu-ningSYMPOSIUM449-4532Orthodontic treatment of multi-tooth scissor crossbiteLIU Lin, CHEN Wen-li, CUI YanSYMPOSIUM454-4583Scissors-bite correction with orthodontic mini-implantsLIU XinSYMPOSIUM459-461,4664Discussion of related factors on maxillary sinus elevation surgery in the elderlyZHANG Jin-jing, DAI Yong-yuEXPERT EXPERIENCE462-4665Evaluation of curative effect of initial therapy on the patients with aggressive periodontitisZHANG Peng, XIAO Jian-ping, TAN Bao-chunORIGINAL CONTRIBUTIONS467-4706The relationship between the serum level of PON-1, IL-6 and periodontal diseasesSUN Xiao-ju, LIU Xu, ZHANG Ying-kun, WANG Yun, XIE HongORIGINAL CONTRIBUTIONS471-4747The retrospective study of the treatment of bimaxillary protrusion with micro-implant anchorage techniqueYANG Yi-fan, YANG Lei, DING YinORIGINAL CONTRIBUTIONS475-4788Observation of the maxillary first molar mesiobuccal root canal system by using cone beam computed tomographyLIU Wen-fei, CUI Guang, GONG LinORIGINAL CONTRIBUTIONS479-4819Expression of BMP-1 and Noggin in periodontal tissue during tooth movementZOU Cong, LIANG Yuan, CHANG XinORIGINAL CONTRIBUTIONS482-48610Influence of psychosocial intervention on juvenile patients in psychososis and orthodontic treatmentWANG Su-qin, CHENG Zhao-ming, YAN XiangORIGINAL CONTRIBUTIONS487-48911Determination and analysis of Prevotella intermedia and Streptococcus in the infected root canals of teeth with chronic periapical periodontitisPENG Yi-chun, LI Yue, LIU Nai-yuORIGINAL CONTRIBUTIONS490-49212Analysis of craniofacial characteristics of class Ⅱ and Ⅲ malocclusion in early permanent dentitionYU Lei, YU Shan, ZHU GangORIGINAL CONTRIBUTIONS493-49513@@496-49714Research progress of how to establish ideal interface around implantSUN Dong-meiREVIEW498-50115Development history and current status of clinical denial photography in ChinaWEI Jin-qiREVIEW502-50516Factors influencing the height of peri-implant papillaeGAO Fei, LIU Zhong-haoREVIEW506-50917One case report of esthetic restoration of anterior teeth with Charisma(R) Diamond resinCASE REPORT510-512 