1Flapless techniques for alveolar ridge preservation after extraction of maxillary molars with severe periodonti-tis to simplify the complexity of implant treatment:a case report of 2-year follow-upWEI Yi-ping, YANG Ting, HU Wen-jieCOLUMN OF SOFT AND HARD TISSUE AUGMENTATION TECHNIQUE IMPROVING IMPLANTATION CONDITION130-1372Application of alveolar ridge preservation to improve the implant condition after extraction of mandibular sec-ond premolar with severe bone destruction:a case report of 2-year follow-upHAN Zi-yao, XU Yan-geng, XU Tao, HU Wen-jie, LIU Yun-songCOLUMN OF SOFT AND HARD TISSUE AUGMENTATION TECHNIQUE IMPROVING IMPLANTATION CONDITION138-1443Efficacy of ridge preservation to improve security of implantation in the mandibular molar extraction sockets with periodontal and endodontic lesions:a case report of 3-year follow-upSHI Yu-tong, ZHANG Hao-yun, HU Wen-jie, XU Tao, LIU Yun-songCOLUMN OF SOFT AND HARD TISSUE AUGMENTATION TECHNIQUE IMPROVING IMPLANTATION CONDITION145-1504Soft and hard tissues augmentation in mandibular molar site of a patient receiving local radiotherapy for oral cancer 5 years ago:a case reportZHANG Hao-yun, REN Yu-ying, HU Wen-jie, LIU Yun-song, XU Tao, WEI Yi-ping, HAN Zi-yaoCOLUMN OF SOFT AND HARD TISSUE AUGMENTATION TECHNIQUE IMPROVING IMPLANTATION CONDITION151-1575Effect of the implant prosthesis on radiotherapy for patients with head and neck cancer:a retrospective studyLIU Jing, WU Yi-qun, LI Jie, CAO Shu-shu, BI Fan, YE Li-juanORIGINAL CONTRIBUTION158-1606Clinical evaluation of Bio-Oss? combined with two materials in alveolar ridge preservation of posterior teethYANG Ting-ting, QIU Wei-en, CHEN Qin-yi, HU Han-tao, BAN YuORIGINAL CONTRIBUTION161-1667Application of concentrated growth factor in autogenous tooth transplantation with inflammation in recipient areaAINIWAER Ailimaierdan, KERANMU Dilinuer, WANG Ling, NUERMUHANMODE NijiatiORIGINAL CONTRIBUTION167-1728Comparative study on the remineralization effect of different bioactive glass on the demineralized dentinYUE Yang-li, HE Gui-tian, LIU Cui-li, MA Gui-xiaORIGINAL CONTRIBUTION173-1789Questionnaire survey on the treatment for fistula periapical periodontitis of deciduous teeth among pediatric dentistsDU Yang, CHEN Yu-jiang, WANG Lu-lu, SUN Shu-kai, HAN Xin-xin, WANG Jun-hui, ZHANG Bai-ze, WANG Xiao-jingORIGINAL CONTRIBUTION179-18310Investigation of sleep disordered breathing in orthodontic children and adolescent patientsKONG Rong-rong, DU Hai-yan, LIN Ting-ting, LIANG Wen-hui, WANG Li-ying, QIAO HuORIGINAL CONTRIBUTION184-18611Survey research in the influence of parental education level on caries in children aged 3 and below in TaiyuanFAN Yu-ling, CHENG Lin, LIU Qing-meiORIGINAL CONTRIBUTION187-191,19612Study of correlation between inclination angle of ectopic eruption of first permanent molars and root resorption of second deciduous molarsXU Chen, ZHOU Li-bin, SU KuiORIGINAL CONTRIBUTION192-19613A preliminary study on the effect of thermal stimulation on the regulation of NLRP3/Caspase-1 signaling path-way in human periodontal ligament cellsWANG Fei, TAO Rong, NI Long-xingORIGINAL CONTRIBUTION197-20214Study on the effect of medical ozone on condylar cartilage in rats with osteoarthritis of the temporomandibular jointZHANG Wan-xia, HEILILI Maisituremu, NUERMUHANMODE Nijiati, LIU Jiang-long, LIU Di, TUERDI MaimaitituxunORIGINAL CONTRIBUTION203-20815Analysis of serum level of anti-desmoglein 3 antibody and its influencing factors in patients with pemphigus vul-garisZHANG Miao-miao, WANG Xiang, WANG Wen-mei, DUAN Ning, JIANG Hong-liu, LIN LinORIGINAL CONTRIBUTION209-21116Application of VELscope autofluorescence examination in diagnosis and malignancy screening of erosive oral li-chen planusWANG Ying, LI Zhi-ping, WANG Hao-ran, MENG Jian, PENG SenORIGINAL CONTRIBUTION212-21517Analysis of oral clinical manifestations and serological test results of secondary syphilisWU Kai-hui, DUAN Ning, ZHOU Chong-chong, LIU Wei-ling, WANG Xiang, LIU Qin, WANG Wen-meiORIGINAL CONTRIBUTION216-21918Improving surgical competence of periodontal refresher doctors based on progressive model trainingFENG Xiang-hui, LIU Kai-ning, HU Wen-jieCOLUMN OF STOMATOLOGY EDUCATION AND RESEARCH220-22319Practice and experience in anesthesiology training in the oral and maxillofacial surgery postgraduate educationZHANG Xia, DENG Yu, BAI Xiao-fengCOLUMN OF STOMATOLOGY EDUCATION AND RESEARCH224-22620Advance in researches on sustained-release drug delivery system for periodontitisLI Yi-jun, TIAN Er-kang, XIAO Shi-meng, LI Jian-shu, ZHAO LeiREVIEW227-230 