1The effects of naringin on the activity of collagenase from dentinLIU Zheng-ya, YU Hao-han, XU Rong-chen, YU Fan, CHEN Ji-hua, LI Fang373-3772Hyperoxia solution inhibits common pathogenic bacteria in root canalCHE Lei, LIU Rui384-3893Comparision of root canal transportation by ProTaper Next, S3 and Reciproc instruments in root canal preparationZHOU Li-bo, HAN Xiang-cui, WANG Jian-ping, DAI Xin-peng, LIU Lu-bin390-3944Comparison of bond performance between Ceramage polymerization ceramic inlay and four bonding materialsSHEN Bao-lian, DENG Jiu-peng, WANG Ji-de, YIN Hao-yue, MA Li-juan395-3995Dental caries and its related risk factors in preschool children in QingdaoJIA Song-bo, JIANG Ming, SUN Tong-zheng, CHEN Zheng-gang, YANG Fang, TENG Fei400-4046Treatment of the impacted and inverted anterior teeth by overturn in alveolar boneLIU Zhe, LIU Quan-hui405-4097Comparison of the curative effects of MRC appliance K series and Activator in the treatment of mouth breathing patientsSUN Qi, PENG Yuan410-4138The combined application of ultrastrong fibrous band, vitallium framework and periodontal splint in the fixation of free and loose teethLIU Qian, ZHANG Wei414-4179The situation and the prevention and treatment strategy of periodontal disease in military personnelYAN Jian-fei, CHEN Huo-liang, GUO Jing418-42210The impact of radiotherapy and chemotherapy on periodontium and periodontal management for patients with head and neck malignancyZHANG Jia-yu423-42611Application of TBL and CBL combined teaching method in the clinical practice teaching of endodonticsCHEN Min-min, ZHANG Jian-ying, BAI Xin-na, WANG Xiang-zhu, WANG Ya-li, SHEN Ting427-430