1Total knee arthroplasty for the treatment of bilateral knee rheumatoid arthritis in the same periodChen Rong-bo, Hou Na, Wang Ren, He Ming, Wang Er-feng, Zhang Wei-tao, Li Xiao-jian, Li Xian-zhi493-4982Evaluation and influencing factors of knee function in aged patients with osteoarthritis before and after total knee arthroplastyZhang Sheng-hai, Fu Li-ming, Ma Zhao-ji, Jiang Guo-wang499-5033Epidemiology of total knee arthroplasty：a retrospective analysis among 1 146 cases in Hefei City from 2008 to 2013Xu Peng-fei, Yin Zong-sheng, Gao Wei-lu, Ma Zhi-xiang504-5094Uncemented prosthesis revision of failed cemented hip arthroplasty：mid-term resultsLi Peng, Zhu Zhi-qi, Hou Ming, Shi Zhan-jun510-5155Total hip arthroplasty for ankylosing spondylitis：the spine-pelvis sagittal balance and quality of lifeGao Yi, Wang Bin, Xie Zi-kang, Shen Peng-fei, Xu Jian-da, Zheng Chong, Qu Yu-xing516-5216Restoration of fracture and dislocation of lower cervical spine：bone graft fusion and cervical stabilityWang Jian-yuan, Deng Qiang, Sheng Wei-bin, Lu Yong-jiang522-5307Conservative treatment of mild ossification of cervical posterior longitudinal ligament：prognostic factors and timing of surgical repairShen Cang-hai, Feng Yong-jian, Wang Li-guo, Yang Cheng, Peng Ning-ning, Wang Gui-jiang, Guo Xu531-5368Treatment for thoracolumbar spine infection without removing internal fixationLin Xu, Tan Lun, Zeng Jun, Wu Chao, Ding Yong, Guo Yong537-5429Modified transmultifidus approach and posterior central approach of vertebrae pedicle screws in the treatment of thoracolumbar vertebral fractures：vertebral stability and related indexesHu Zheng-xia, Li Kai-nan, He Zhi-yong543-54710Sextant system fixation for the repair of lumbar fracture：ratio of anterior to posterior border height of the injured vertebra and kyphosis Cobb angleLiu Cheng-jun, Gu Zu-chao, Zhang Yu548-55311External fixation associated with limited internal fixation and vacuum sealing drainage repair Gustilo II and III fracture：time effectiveness and stagingCheng Yong-tao, Wang Wei, Zhao Yan, Zhang Hai-yang, Zhang Shu-cai554-56112LISS plateversus condylar plate internal fixation for the treatment of distal femoral fractures：difference in bone healing and knee joint functional prognosisXu Li562-56713Treatment of Tossy III acromioclavicular joint dislocation：biomechanical change of anchor-reconstructed coracoclavicular ligamentHan Bing, Feng Hui, Chen Shuo, Wang De-guang, Zhang Chuan-kai568-57214Anatomical locking compression plate in the repair of olecranon fracture：6-month follow-up evaluation of elbow functionQi Yan, Tian Jun, Yao Yu, Liu Hao, Sun Lei573-57715Open release combined with hinged external fixator repairs extremely severe elbow stiffnessLiu Sheng-ping, Liu Guo-qiang578-58316Adjustable and ordinary locking compression plates for the repair of osteoporotic distal radius fractures：comparison of radial length and wrist function recoveryWang Bin, Gao Yi, Xu Jian-da, Xie Zi-kang, Shen Peng-fei, Zheng Chong, Qu Yu-xing584-58917Plaster fixationversus cannulated screw internal fixation for the wrist scaphoid bone fresh fracture：comparison of functional recoveryKayishaer ? Maimaitiming, Zhao Yan590-59518Implant fixation repairs lower extremity fractures in the elderly：effects of different anesthesia methods on hemodynamics and analgesiaZhu Zi-fu596-60019Memory alloy osteosynthesis plate fixation for flail chest injuries：1-year follow-upLi Tie-bin, Zhang Hai-qing601-60520Clinical significance of CT image digital screw channel analog measurement of C4-C6 anterior fixed parametersFu Yu, Lin Bing, Li Xiao-he606-611 