1Application of the endoscope in condylar fracture man-agementBAI Xiao-feng, LU Li514-5172The epidemic study on the relationship between periodontitis and chronic obstructive pulmonary diseaseTAN Li-si, ZHAO Xue, WANG Hong-yan, PAN Ya-ping518-5223Research diagnostic criteria for temporomandibular disorders for evaluating axis diagnosis of TMD patients in ChinaCHEN Wei-sheng, ZHENG You-hua, LIN Xue-feng523-5264Short-term clinical curative effect analysis on application of flapless technique in dental implantationHE Jing, SHANG Ya-wei, CHEN Chu-wen, DENG Chun-fu, SHANG De-hao, ZHANG Chong, WANG Dan-ning, ZHAO Bao-hong527-5315Application of digital rapid process implant template in implant surgery of maxillary anterior teeth areaSHI Guang-hui, REN Chun-fu, YANG Zhong-rui, ZHU Yong-cui, ZHAI Lei532-5346Effects of glucocorticoid on osteoprotegerin expression in periodontal ligament cellCHEN Jin, LI Qiu-lan, LUO He-ping, LI Qin535-5377The research on the pathogeny of black tooth stain and the association between black tooth stain and primary dentition caries in preschool childrenSUN Jia-yi, ZHAO Xia, TENG QI, LUAN Xiao-ling, LI Hong538-5418The effect of occlusal reduction on the postoperative pain level after one-visit endodontic treatment for acute pulpitisYOU Yue-hua, LI Mei-zai542-5449Evaluation of clinical efficacy of mini-screw implant as anchorage for extruded molar intrusionHONG Shuo545-54710Influence of ultrasonic irrigation on the endodontic interappointment painJING Tie-nan, NIU Lei548-55011Application of computer-aided surgery in the treatment of diseases of temporomandibular jointLU Chuan, HE Dong-mei, YANG Chi554-55712The mechanism of calcium hydroxide in root canal disinfectionGUO Jia-jie, QIU Li-hong558-56313Research progress of SIRT1 in suppressing inflammatory responseQU Liu, QIU Li-hong564-56814The relationship between oral malodor and periodontal diseaseLV Xin, LIN Li569-572