1Clinical application and future prospects of dynamic navigation system in oral implantologyGE Yan-jun, LIU Xiao-qiang, WANG YongSYMPOSIUM449-4552Application of digital technologies in periodontal soft tissue augmentationMIAO Li-li, HAN Ye, ZHAN Ya-lin, HOU Jian-xiaSYMPOSIUM456-4603Construction of course system for digital dentistryWANG Yong, ZHAO Yi-jiaoSYMPOSIUM461-4664Digital technology assists clinical research in stomatologyZHAO Yi-jiao, WANG YongSYMPOSIUM467-4725Study on the effect of new non-abrasive toothpaste on the surface properties of polymethyl methacrylate resinLI Miao, YU Fei-yan, WANG Qian-qian, ZHANG Bing, ZHANG Zhi-jun, REN Xiu-yun, ZHAO Bin, WANG Lu, CHENG YanORIGINAL CONTRIBUTIONS473-4786Influence of miR-424 on the biological activity of ameloblastomaDING Zhen-jiang, LIU Jie, ZHONG MingORIGINAL CONTRIBUTIONS479-482,4897Study on the position and morphological characteristics of the tongue and hyoid bones of patients with skeletal class Ⅱ malocclusion based on cone-beam CTMOU Hong-en, QIAN Yu-fenORIGINAL CONTRIBUTIONS483-4898Effect of age on biological behavior of human periodontal ligament stem cellsZHANG Kai, DU Ting-ting, ZHANG Yi, WU Ying-taoORIGINAL CONTRIBUTIONS490-4959Research progress in transient receptor potential channel and dental painMA Yu-qi, LIANG Yu-hongREVIEW496-50010Research advances in mechanism of the implant with hydrophilic surface to promote osseointegrationLI Xue-jing, QIU Xiao-hai, ZHAO Bao-hongREVIEW501-50511Application and prospect of augmented reality in oral and maxillofacial surgeryCHENG Jie, TANG WeiNATION HEALTH ASSISTING ALL-ROUND-WELL-OFF COLUMN506-509