1Artificial intelligence in knee surgery:status and prospectZHANG Yuan, GU Wen-huaFORUM FOR EXPERTS81-862A survey on the current status of trauma care in China and the training effect of China Trauma Care Training-Leader ( CTCT?-L) courseXU Yong-an, ZHANG Mao, ZHAO Xiao-gang, LI Zhan-fei, BAI Xiang-jun, JIAN Ting-xu, ZHANG Lian-yangORIGINAL ARTICLES87-933The role of continuous optimization program in damage control of perioperative blood loss during primary total knee arthroplastyLIU Zai-yang, ZHANG Jun, LI Jie, HE Kai-qi, ZHANG Yu-mei, ZHANG YuanORIGINAL ARTICLES94-1004Retrograde femoral intramedullary nail for treatment of Kim ⅠB supracondylar fracture of femur after total knee arthroplastyYAN Yu, JIANG Hua, ZENG Yong, MA Hong-bing, XU Bing, WANG Jun-rui, JIANG Dian-ming, LIU Xiao-yanORIGINAL ARTICLES101-1045The effect of pedicle screw fixation via Wiltse approach in the treatment of multilevel noncontiguous thoracolumbar fracturesYIN Xiang, WANG Ying-bo, LIU Bai-yi, WANG Chen-xu, XIANG Yu, ZHAO Jian-hua, LIU PengORIGINAL ARTICLES105-107,1206Clinical study of percutaneous transpedicular screw-rod internal fixation for thoracolumbar fractureLIANG Hong-zhi, ZHOU Li, YAO Shu-jun, LIU Zhao-shu, ZHANG Xiao, ZHAO Han-chengORIGINAL ARTICLES108-1127Clinical observation of IN-FIX for treatment of the anterior pelvic ring injuriesDING Ming-cong, WEI Pan-deng, HU Xu-chang, WANG Zhen-shan, CHEN Bao, ZHANG Cang-yu, YANG Tong-qun, WAN Lin, ZHANG QianORIGINAL ARTICLES113-1158Relevant risk factors of DVT after operation for intercondylar fracture of femur and the establishment of prediction modelGU Zaliayi, XIE Zeng-ruORIGINAL ARTICLES116-1209Application research of chest physical intervention in prevention of ventilators associated pneumonia in severe traumatic brain injuryWANG Hui, YUAN Xi, ZHUO Hong-xia, LI Yan-li, JIANG MinORIGINAL ARTICLES121-12510Endoscopic surgery and curative effect analysis of traumatic cerebrospinal fluid rhinorrheaSONG Yue, QIAO Liang, ZHANG An, XUE Jin, DING Hui, DONG Guo-junORIGINAL ARTICLES126-12811A comparative study of the treatment of femoral shaft fractures with femoral trochanteric nail insertion point and piriform fossa incision interlocking intramedullary nailXIA Xi-shang, FANG Xuan-cheng, QIU Xin-jian, LIU Tao, HE LiuORIGINAL ARTICLES129-13212Clinical comparison of proximal intramedullary nail-screw blade internal fixation and artificial joint replacement in elderly hip fractureJIN Zhong-jun, SHEN Zhao, LIU Bei-ni, LIU Shu-jiang, HAO Yu-shengORIGINAL ARTICLES133-13713Decompression and non-decompression for the treatment of thoracolumbar burst fractures without neurological symptomsWANG Jun, FANG Xiao-wen, XU Yi-liang, WANG WeiORIGINAL ARTICLES138-14014Clinical analysis of distal third tibia-fibula fractures treated by tibia intramedullary nail without fibular fixationZONG Shuang-le, SU Li-xin, LIANG Wei-dong, LI Li-dong, WANG Ai-jun, HU Qi-fengORIGINAL ARTICLES141-14415Plate versus screw internal fixation for posterior malleolus fractureMA Bao-zhong, ZHANG Zheng, CHEN Hai-mingORIGINAL ARTICLES145-14716Development of external fixation techniques for calcaneal fracturesXIA Shen, ZHAO Ze-yu, LV Qian, ZHU Yue-liangREVIEWS148-15017Comparison of cemented and bioprosthetic femoral head replacement in elderly patients with femoral neck fracture151-15218Clinical comparison of different surgical methods for tibial plateau posterior condyle fracture153-15519Vascular crisis at 4 weeks after replantation of digital amputation:a case report and literature review156-15720Research progress on trauma complicated with multidrug-resistant bacterial infection in peacetime and wartimeWANG Xiao-qian, HONG LiuLECTURE158-161 