1Risk of tooth extraction and its prevention in patients with neurological diseases and psychiatric diseasesZHENG Xue-ni, XUE Yang, MA Yang, HU Wen-yan, HU Kai-jinSYMPOSIUM513-5172Risk of tooth extraction and its prevention in old people and childrenLIU Ping, XUE Yang, HU Kai-jin, DENG Tian-ge, DING Yu-xiangSYMPOSIUM518-5213Risk of tooth extraction and its prevention in patients with long-term medicationsMO Jing-zhen, HU Kai-jin, XUE Yang, LIU Chuan, ZHANG Yu, ZHANG Shu-yinSYMPOSIUM522-5254Risk of tooth extraction and its prevention in female patients during special physiological periodsLI Guo-wei, HU Kai-jin, ZHENG Xue-ni, ZHANG Lin-lin, XUE YangSYMPOSIUM526-5295Effects of transforming growth factor-β1 on the osteogenic differentiation of human dental pulp stem cellsJIANG Li-ming, SONG Ge, XIA Shang, CHEN XuORIGINAL CONTRIBUTIONS530-5336Evaluation on the related factors of swallowing functions in patients with tongue defects after surgery for oral cancer or oropharyngeal cancerLU Huan-zi, LIANG Yu-jie, YANG Le, XIAO Yu-dong, LIAO Gui-qingORIGINAL CONTRIBUTIONS534-5377Evaluation of clinical effect of articular disc repositioning combined with orthodontic functional appliance in the treatment of juvenile bilateral temporomandibular joint anterior disc displacement and skeletal class Ⅱ malocclusionZHU Hui-min, HE Dong-mei, YANG Zhi, SONG Xin-yuORIGINAL CONTRIBUTIONS538-5438Effects of upper airway obstruction on prevalence of malocclusion and craniomaxillofacial development in childrenZHAO Rui, LU Shu-juan, ZHAO Zhen-jin, TIAN Yu-lou, LIU Shuai, WANG Jun-yan, TANG Ru-pingORIGINAL CONTRIBUTIONS544-5519A sampling survey of permanent crown caries and periodontal diseases in 35-74-year-old population in Liaoning Province (2015-2016)ZHANG Kai-qiang, CHENG Rui-bo, LI Jian, LU Zhen-fuEPIDEMIOLOGICAL SURVEY OF ORAL HEALTH552-55610Research progress of physical and pharmacological therapies for temporomandibular joint osteoarthrosisQIAO Qi-hui, ZHOU QingREVIEW557-56311Research progress in laser treatment for oral leukoplakiaMA Rui, LIU Yao-ran, ZHAO Ji-zhiREVIEW564-56812Research progress in the application of platelet-rich fibrinogen as a graft material in maxillary sinus liftLIU Rui-min, WU Dong, CHEN JiangREVIEW569-573 