1Review of research progress and related issues of finite element modeling in surgical treatment of lumbar degenerative diseasesSUN Xiang-yao, LU Shi-bao, ZHANG Qing-ming, CAO li, WANG Ju-yong, HUANG Jiang, LIU Yu-qi, SONG Ze-long, TANG Wei, CHEN Yun-qiangEditorial241-2472Analysis of risk factors of adjacent segment degeneration after lumbar fusion based on 5-year follow-upLIU Qing-tao, WANG Hui, XU Xing-zhu, YANG Pu-xin, XU Jia-xin, DING Wen-yuanSpine surgery248-2533The influence of structural characteristics of pedicle screw - rod system on upper instrumented vertebra fracture after surgical treatment of adult degenerative scoliosisSUN Xiang-yao, ZHANG Qing-ming, CAO Li, WANG Ju-yong, HUANG Jiang, HU Hai-liang, SUN Wen-zhi, KONG Chao, LU Shi-baoSpine surgery254-2594The efficiency of preoperative Halo-gravity traction in the treatment of severe spinal deformity on radiology, pulmonary functionWANG Jian-qiang, ZHANG Yang-pu, HAI Yong, HAN Bo, ZHOU Li-jin, ZHANG Yi-qiSpine surgery260-2655Predictive value of Hounsfield units measurement for nonviolent fracture of the new vertebral body after percutaneous vertebroplastyYANG Pu-xin, WANG Hui, XU Jia-xin, XU Xing-zhu, LIU Qing-tao, DING Wen-yuanOriginal article266-2706Development and validation of a predictive model for femoral head necrosis after femoral neck fracture based on machine learning algorithmsYAN Chun, CAO Yong, CHEN Yin-bing, PAN Ya-qiangOriginal article271-2777Effects of DDR2 regulation of LncRNA UCA1 / miR-590-3p axis on the release of inflammatory factors and the expression of MMPs in osteoarthritis chondrocytesSUN Qiang, ZHANG Da-wei, CHEN Yong-feng, WANG Hua-yi, WANG Yuan-rui, WANG Peng, SONG He-qiang, JIA HongOriginal article278-2848Correlation analysis between psoas muscle index and prognosis of conservative treatment of osteoporotic vertebral compression fractureMA Sai, ZHANG Ning, JIANG Wen, WANG Qian, HE DaClinical research and practice285-2899Comparison of unilateral biportal endoscopic and fenestration in the treatment of migrated disc herniationZHOU Jin-song, LI Ye-chengClinical research and practice290-29510Risk factors of secondary fracture of adjacent vertebra after percutaneous vertebroplastyLIAO Zhi-fu, KUANG Zhong-qiang, QU Shi-yan, SONG Liu-hongClinical research and practice296-30111Risk factor analysis of myeloid hypertension after transforaminal and interlaminar endoscopic lumbar spine surgeryLYU You, DONG Zhao-rui, LIU YueClinical research and practice302-30512Advances in epidemiology, influencing factors and related mechanisms of osteoporosisYANG Cheng, WU Dou, LIU QiangReview306-31013Research progress of gut microbes and osteoporosisLI Zhi-qiang, YANG Qian-zi, SU An-ping, MA Hai-taoReview311-31514Adalimumab combined with doxycycline in the treatment of SAPHO syndrome: a case reportXIANG Bei, HOU Yu-ting, SHEN Yun, XIE Dong-hao, ZHOU Wen-shen, HE Dong-yi, SUN Hong-mei, TANG Xiao-rong, BIAN Yan-qinCase report316-320 