Three dimensional finite element analysis on the novel absorbable screw and traditional screw for fixing Lange Hansen type 1 medial malleolus fracture
BACKGROUND: Poly L lactic acid, as a novel biological material, has been used in the field of orthopedics with good histocompatibility. Poly L lactic acid can be absorbed by tissue, without secondary surgery, and do not react with the surrounding tissue. The elastic modulus of the absorbable material is close to the bone, which is more beneficial to the healing of the fracture. However, biomechanical aspects of absorbable screws have not been adequately described in the present literature. OBJECTIVE: To investigate the feasibility of novel absorbable screw fixation in repair of Lauge Hansen type 1 medial malleolus fractures using three dimensional finite element technology. METHODS: A Lange Hansen type 1 medial malleolus fracture models were established by using the CT scan data, and fixed by the novel absorbable screws, novel metal screws and traditional metal screw. Finite element analysis software was used to get the stress value and displacement. RESULTS AND CONCLUSION: (1) There were totally 36 240 units, 7 660 nodes in the novel absorbable screw fixation model under 450 N force; the maximum stress of screws was 46.78 MPa; the maximum displacement was 0.239 mm; the maximum displacement of the distal fracture was 0.248 mm. (2) There were totally 36 240 units, 7 660 nodes under 450 N force in the novel type metal screws fixation model; the maximum stress of screws was 46.49 MPa; the maximum displacement was 0.223 mm; the maximum displacement of the distal fracture was 0.214 mm. (3) There were totally 41 236 units, 8 121 nodes under 450 N force in the traditional metal screws fixation model; the maximum stress of screws was 59.08 MPa; the maximum displacement was 0.182 mm; the maximum displacement of the distal fracture was 0.207 mm. (4) The novel absorbable screws used in Lange Hansen type 1 medial malleolus fracture obtained uniform total stress distribution, and small possibility of screw breakage. (5) The experiment verifies the biomechanical feasibility of absorbable screws for simple medial malleolus fracture. For Lange Hansen type 1 medial malleolus fracture, novel absorbable screw is an alternative choice for clinical doctors. Subject headings: Finite Element Analysis; Biomechanics; Ankle; Fractures, Bone; Stress, Mechanical; Tissue Engineering Funding: a grant from the Health and Family Planning Commission of Shanghai City, No. 201440062, ZK2015B17 0 Yin Yan Introduction Yi Yong Ke Xi Shou Cai Liao Zhu Yao Shi Zhi Ju L Ru Suan Deng Yi Lei Zai Ti Nei Zhi Ru Yi Duan Shi Jian Ke Bei Zu Zhi Xi Shou De Sheng Wu Cai Liao Zai 20Shi Ji 80Nian Dai Fen Lan De RokkanenJiao Shou Shou Ci Bao Dao Jiang Ke Xi Shou Cai Liao Yong Yu Gu Ke Nei Gu Ding Qi Jie Zhi Hou ,Zhe Chong Xin Xing Cai Liao Yi Qi Ke Xi Shou Xing Bi Mian Er Ci Shou Zhu De You Shi Xun Su De Dao Liao Lin Chuang De Ying Yong Zai Yi Xie Bao Dao Zhong Xian Shi ,Ke Xi Shou Luo Ding De Lin Chuang Sheng Wu Xue Xiao Guo Yu Chuan Tong Luo Ding Bi Jiao ,Zai Huan Zhe Yu Hou Fang Mian Mei You Fa Xian You Jiao Wei Ming Xian De Chai Bie Ke Xi Shou Luo Ding Wang Wang Zai Zhi Ru De 48 hNei Zi Shen Fa Sheng Peng Zhang ,Bing Ke Bao Chi Qiang Du Da 6Ge Yue De Shi Jian Zhe Yang De Sheng Wu Xue Te Xing Shi De Ke Xi Shou Cai Liao Zai Lin Chuang Shang De Nei Gu Ding Xiao Guo Geng Wei Man Yi Ci Wai ,You Yu Qi Ju You Liang Hao De Zu Zhi Xiang Rong Xing ,Wan Quan Jiang Jie Hou De Chan Wu Wei Shui Yu Er Yang Hua Tan ,Bu Hui Zai Ti Nei Can Liu ,Yin Ci Zai Lin Chuang Shang Huo De Liao Yan Fan De Yun Yong Ran Er ,Mu Qian De Wen Xian Zhong Shang Wei Dui Ke Xi Shou Luo Ding De Sheng Wu Li Xue Fang Mian Zuo Jiao Wei Chong Zu De Chan Shu You Xian Yuan Fa Zuo Wei Yi Chong Ji Suan Ji Fu Zhu Li Xue Fen Xi Fang Fa ,20Shi Ji 40Nian Dai You CourantTi Chu Hou ,Zai Da Xing Ji Jie She Ji Gong Cheng Fen Xi Sheng Wu Li Xue Fang Mian De Dao Liao Yan Fan De Yun Yong You Xian Yuan Fa De Ji Ben Yuan Li Shi Tong Guo Ji Suan Ji Yong Fu Zhi Hou De You Xian Ge Dan Yuan ,Yong Jie Dian Jia Yi Lian Jie Zhi Hou Shi Jia Li De Zai He Yi Ji She Zhi Bian Jie Yue Shu ,Mo Ni Xian Shi Zhong Mu Biao Wu Ti De Shou Li Huan Jing ,Yu Ce Shi Ji Shou Li De Qing Kuang Zai Yi Xue Ling Yu ,You Xian Yuan Fa Ye Bei Yan Fan Yun Yong Yu Gu Ge ,Kou Qiang Yi Ji Xin Xie Guan Fang Mian De Shou Li Fen Xi Wen Zhang Jiang Jie Zhu Xian Dai You Xian Yuan Fang Fa ,Tong Guo Fen Xi Xin Xing Ke Xi Shou Luo Ding Yi Ji Chuan Tong Luo Ding De Shou Li Qing Kuang ,Fen Xi Liang Zhe Zai Gu Ding Lauge Hansen 1Xing Nei Huai Gu Zhe Zhong De Sheng Wu Li Xue Qing Kuang ,Yan Jiu Zai Sheng Wu Li Xue Fang Mian Liang Zhe De Chai Bie ,Wei Lin Chuang Shi Yong Xin Xing Ke Xi Shou Luo Ding Ti Gong Geng Hao De Sheng Wu Li Xue Yi Ju 1 Dui Xiang He Fang Fa Subjects and methods 1.1 She Ji Ji Suan Ji Mo Ni Sheng Wu Li Xue Shi Yan 1.2 Shi Jian Ji Di Dian Yu 2017Nian 5Yue Zai Shang Hai Shi Pu Dong Yi Yuan Gu Ke Sheng Wu Li Xue Shi Yan Shi Wan Cheng 1.3 Dui Xiang Tiao Xuan 1Ming 23Sui Jian Kang Nan Xing Zhi Yuan Zhe ,Shen Gao 172 cm, Ti Zhi Liang 76 kg,Pai Chu Xiang Guan Huai Guan Jie Sun Shang Ji Xing Zhong Liu Deng Ji Bing Chong Fen Gao Zhi Zhi Yuan Zhe Gai Shi Yan De Xiang Guan Yan Jiu Nei Rong ,Bing Qian Shu Zhi Qing Tong Yi Shu 1.4 Fang Fa 1.4.1 Huo Qu CTTu Xiang Zhu Zhi Yuan Zhe Yang Wo Wei ,Cai Yong 64Ceng Luo Xuan CT Yi Ceng Hou 1.25 mmSao Miao Jing Gu Zhong Xia 1/3Duan Yi Ji Huai Guan Jie ,Huo De CT Tu Xiang Zi Liao Sao Miao Can Shu :120 kV,240 mA,Gong Huo De Sao Miao Tu Xiang 120Zhang 1.4.2 Zhong Jian San Wei Mo Xing Jiang CTTu Xiang Shu Ju Yi DICOMGe Shi Dao Ru Mimics 15.0Ruan Jian (Bi Li Shi MaterialiseGong Si ,She Ding Hui Du Yu Zhi Wei 160 6 000 Hu,Huo Qu Gu Ge Bian Jie Lun Kuo Zhi Hou Li Yong Qu Yu Zeng Chang Yi Ji Shou Dong Tu Xiang Bian Ji Gong Neng ,Dui Zuo Xia Zhi Jing Gu Zhong Xia Bu Fen Jin Xing Tian Chong Bing Huo Qu Li Yong Ruan Jian Zi Dai De San Wei Zhong Jian Gong Neng ,Sheng Cheng Jing Gu Zhong Xia Duan Wang Ge Mo Xing ,Cai Yong STLGe Shi Bao Cun Li Yong CADRuan Jian Hui Zhi Chu Chuan Tong Luo Ding Yi Ji Xin Xing Luo Ding Mo Xing ,Tong Yang Yi STLGe Shi Bao Cun 1.4.3 Mo Xing Xiu Shi Yu Zhuang Da Jiang Jing Gu Mo Xing Dao Ru Geomagic StudioRuan Jian (Mei Guo GeomagicGong Si Jin Xing Jian Dan De Song Chi Yi Ji Qu Chu Ding Zhuang Wu Chu Li ,Chu Qu Bu Bi Yao De Xi Jie Te Zheng ,Jian Shao Hou Xu Ji Suan Ji De Yun Suan Liang Bing Dao Ru Luo Ding De STLMo Xing ,Dui Luo Ding Yi Ji Jing Gu Jin Xing Chen FC, Yu BQ, Shi JF, Ao RG, Zhang X, Li DJ, Qian Z. Three dimensional finite element analysis on the novel absorbable screw and traditional screw for fixing Lange Hansen type 1 medial malleolus fracture. Zhongguo Zuzhi Gongcheng Yanjiu. 2018;22(19):3027 3032. DOI:10.3969/j.issn.2095 4344.0793 P.O. Box 10002, Shenyang 110180 www.CRTER.org 3029 Kong Jian Wei Zhi De Zheng Que Bai Fang Tong Shi Gu Zhe Xian De Gou Jian Ye Zai Ci Jie Duan Jin Xing Shi Yan Fen Zu She Zhi :Jiang Shi Yan Fen Wei 3Zu ,Fen Bie Wei Xin Xing Ke Xi Shou Luo Ding Gu Ding Zu Xin Xing Jin Shu Luo Ding Gu Ding Zu Yi Ji Chuan Tong Jin Shu Luo Ding Gu Ding Zu Fen Bie Yi Xiang Tong De Fang Shi Dui Lange Hansen 1Xing Nei Huai Gu Zhe Mo Xing Jin Xing Gu Ding ,Ru Tu 1Suo Shi Jing Ci Jie Duan Chu Li Wan Bi Hou ,Yi STLGe Shi Fen Bie Dao Chu Ge Ge Mo Xing 1.4.4 Wang Ge You Hua Jiang Ge Ge Mo Xing Fen Bie Dao Ru 3 maticRuan Jian Jin Xing Wang Ge Jian Cha ,Yi Ji Zhong Hua Fen You Hua ,Bi Mian Hou Qi Yun Suan Zhong Yin Wang Ge Zhi Liang Wen Ti Chu Xian De Bu Shou Lian Qing Kuang ,Yi STLGe Shi Dao Chu 1.4.5 Cai Liao Shu Xing Can Shu Fu Zhi Jiang You Hua Hou De STLWang Ge Mo Xing Fen Bie Dao Ru HypermeshRuan Jian (Fa Guo AltairGong Si ,Li Yong Tetramesh Gong Neng Jiang Qi Hua Fen Wei You Xian Yuan Ti Wang Ge ,Bing She Zhi Dan Yuan Shu Xing Wei solid185. An Bu Tong Cai Zhi Fu Yu Ti Wang Ge Cai Liao Can Shu ,Jian Biao 1. 1.4.6 Bian Jie Yue Shu She Zhi Yi Ji Zai He Jia Zai Jiang Jing Gu Jin Duan Duan Mian Shang De Suo You Jie Dian Ge Fang Xiang Shang Jin Xing Yue Shu ,Mo Ni Jin Duan Jing Gu Bei Jian Gu Di Gu Ding She Zhi Gu Yu Gu Zhi Jian Yi Ji Gu Yu Luo Ding Zhi Jian Wei Mo Ca Xi Shu 0.3De Hua Dong Mo Ca She Ding 450 NDe Li ,Qi Zhong 300 NJun Yun Shi Jia Zai Jing Ju Guan Jie Mian ,Ling Wai 150 NJun Yun Shi Jia Yu Nei Huai Guan Jie Mian ,Ru Tu 2Suo Shi 1.4.7 Ji Suan Qiu Jie Li Yong HypermeshZhong De ANSYS(Mei Guo ANSYSGong Si Jie Kou Gong Neng ,She Zhi Ji Suan Kong Zhi Qia Pian ,Bing Yi cdbGe Shi Bao Cun Bing Dao Ru ANSYSZhong Ji Suan Qiu Jie 1.5 Zhu Yao Guan Cha Zhi Biao 1Bu Tong Luo Ding Gu Ding Shi Luo Ding De Ying Li Fen Bu Zui Da Von MisesYing Li Ying Li Ji Zhong Qing Kuang Yi Ji Ying Li Fen Bu Yun Tu ;2Bu Tong Luo Ding Gu Ding Shi Gu Zhe Duan Duan De Zui Da Wei Yi Qing Kuang ,Bing Jin Xing Bi Jiao 2 Jie Guo Results Gou Jian Bao Han Jing Gu De Jian Dan Nei Huai Gu Zhe Mo Xing :Shi Yan Zhong Bao Han Xin Xing Ke Xi Shou Luo Ding Gu Ding Yi Ji Chuan Tong Luo Ding Gu Ding Zu ,Guan Cha Bing Bi Jiao Ge Shi Yan Zu De Ying Li Ji Zhong Bu Wei Yi Ji Wei Yi Bian Hua 2.1 Xin Xing Ke Xi Shou Luo Ding Gu Ding Zu Xin Xing Ke Xi Shou Luo Ding Gu Ding Zu Gong You 36 240Ge Dan Yuan ,7 660Ge Jie Dian Dang Zai Chui Zhi Yu Jing Ju Guan Jie Yu Nei Huai Guan Jie Fang Xiang Shang Gong Tong Shi Jia 450 NDe Li Shi ,Ke Xi Shou Luo Ding Cheng Shou De Zui Da Ying Li Wei 46.78 MPa,Yuan Duan Zui Da Wei Yi Shi 0.239 mm; Gu Zhe Yuan Duan Cheng Shou De Zui Da Ying Li Shi 19.15 MPa,Zui Da Wei Yi Wei 0.248 mm. 2.2 Xin Xing Jin Shu Luo Ding Gu Ding Zu Chuan Tong Luo Ding Gu Ding Zu Gong You 36 240 Ge Dan Yuan ,7 660Ge Jie Dian Dang You Jing Ju Guan Jie Yu Nei Huai Guan Jie Gong Tong Jun Yun Shi Jia 450 NDe Li Shi ,Xin Xing Jin Shu Luo Ding Suo Shou De Zui Da Ying Li Wei 46.49 MPa,Luo Ding Yuan Duan Zui Da Wei Yi Shi 0.223 mm,Gu Zhe Yuan Duan Cheng Shou De Zui Da Ying Li Shi 10.46 MPa,Zui Da Wei Yi Shi 0.214 mm. 2.3 Chuan Tong Jin Shu Luo Ding Gu Ding Zu Chuan Tong Luo Ding Gu Ding Zu Gong You 41 236 Ge Dan Yuan ,8 121Ge Jie Dian Dang You Jing Ju Guan Jie Yu Nei Huai Guan Jie Gong Tong Jun Yun Shi Jia 450 NDe Li Shi ,Chuan Tong Jin Shu Luo Ding Suo Shou De Zui Da Ying Li Wei 59.08 MPa,Luo Ding Yuan Duan Zui Da Wei Yi Shi 0.182 mm,Gu Zhe Yuan Duan Cheng Shou De Zui Da Ying Li Shi 13.50 MPa,Zui Da Wei Yi Shi 0.207 mm,Ru Biao 2Ji Tu 3Suo Shi 3Ge Shi Yan Zu Zai Shou Dao Xiang Tong De 450 NLai Zi Jing Ju Guan Jie Yu Nei Huai Guan Jie De Ya Li Shi ,Luo Ding Biao Xian Chu Wei Yi Cong Jin Duan Dao Yuan Duan Zhu Jian Zeng Da Ying Li Yu Luo Ding Liang Duan Xiang Zhong Yang Zhu Jian Zeng Da ;Ji Zhong Wei Zhi Du Xian Shi Shi Zai Luo Ding Yu Gu Zhe Mian Jie Hong Chu ,Zui Da Wei Yi Chu Xian Zai Luo Ding De Yuan Duan ,Luo Ding Jun Wei Chu Xian Ming Xian De Hua Yi Xin Xing Ke Xi Shou Luo Ding Yong Yu Lauge Hansen 1 Xing Nei Huai Gu Zhe De Gu Ding Zhong ,Ying Li Zong Ti Fen Bu Jun Yun ,Fa Sheng Duan Ding Ke Neng Xing Xiao 3 Tao Lun Discussion Gai Pian Wen Zhang Zhu Yao Tao Lun Xin Xing Ke Xi Shou Cai Liao Yong Yu Gu Ke Lin Chuang De Sheng Wu Li Xue Ke Xing Xing Yan Jiu Sui Zhao Sheng Wu Ke Xi Shou Cai Liao Zai Lin Chuang Shang Yun Yong De Zhu Jian Yan Fan ,Qi You Shi Ye Yu Jia Tu Xian ,Zhu Ru Wu Xu Er Ci Shou Zhu Qu Chu Sheng Wu Xiang Rong Xing Qiang ,Zu Zhi Fan Ying Shao ,Zhi Yu Ti Nei Shi Bu Ying Xiang MRIDeng Shou Jin Shu Ying Xiang De Cao Zuo Ling Wai ,Ke Xi Shou Sheng Wu Cai Liao Gu Ding De Dan Xing Mo Liang Geng Jie Jin Ren Ti Gu Ge De Dan Xing Mo Liang ,Shi De Suo Zhi Ru De Luo Ding Neng Geng Hao Di Ni He Gu Zhe Duan Duan De Huo Dong ,Cu Jin Gu Zhe De Yu He Xue Zhe Men Dui Yu Ke Xi Shou Luo Ding Zai Lin Chuang De Liao Xiao Zuo Liao Da Liang De Yan Jiu Su Yu Xi Deng Yan Jiu Bi Jiao Liao Ke Xi Shou Luo Ding Zhi Liao Er Tong Gong Gu Wai Ke Gu Zhe De Zhong Qi Liao Xiao Zai Tiao Xuan De Er Tong Gong Gu Wai Ke Gu Zhe Huan Er Lin Chuang Zi Liao Zhong ,Qi Zhong 56Li Zuo Wei Shi Yan Zu Cai Yong Ke Xi Shou Luo Ding Zhi Liao ,32Li Zuo Wei Dui Zhao Zu Cai Yong Chuan Tong Ke Shi Zhen Zhi Liao Jie Guo Fa Xian Ke Xi Shou Luo Ding Zhi Liao Er Tong Gong Gu Wai Ke Gu Zhe Yuan Qi Liao Xiao Yu Ke Shi Zhen Xiang Bi ,Zai Zhou Guan Jie Gong Neng Gu Zhe Yu He Gu Gou Fa Yu Gu Zhi Yi Chang Zeng Sheng Dui Bi Chai Yi Bing Wu Xian Zhu Xing Yi Yi Zhang Bin Deng Dui Ke Xi Shou Luo Ding Ti Dai Jin Shu Luo Ding Zhi Liao Xia Jing Fei Lian He Sun Shang De Ke Xing Xing Ji Liao Xiao Jin Xing Liao Yan Jiu Qi Zhong Ke Xi Shou Luo Ding Gu Ding 38Li ,Jin Shu Luo Ding Gu Ding 31Li ,Zhu Hou 6Ge Yue Cai Yong Baird Jackson Ping Ding Biao Zhun Ping Jie Huai Guan Jie Gong Neng Jie Guo Fa Xian Zhu Hou Qie Kou Gan Ran Ji Pi Fu Pi Si Fa Sheng Lu Xia Di Fu Zhong Shi Jian Yu He Shi Jian ,Bi Jiao Chai Yi Wu Xian Zhu Xing Yi Yi 2Zu Jun Wu Nei Gu Ding Shi Xiao Ji Luo Ding Song Dong Duan Lie Deng Bing Fa Zheng Fa Sheng Zhu Hou 6Ge Yue An Baird JacksonPing Ding Biao Zhun Ping Jie Huai Guan Jie Gong Neng 2Zu Chai Yi Tong Yang Wu Xian Zhu Xing Yi Yi Jie Guo Xian Shi ,Cai Yong Ke Xi Shou Luo Ding Nei Gu Ding Neng You Xiao Zhi Liao Xia Jing Fei Lian He Sun Shang ,Liao Xiao Yu Jin Shu Luo Ding Nei Gu Ding Xiang Si ,Qie Wu Xu Er Ci Shou Zhu Qu Chu Dang Ran Lin Chuang Ye Chu Xian Bu Fen Shi Yong Ke Xi Shou Luo Ding Chu Xian Bing Fa Zheng De Bing Li BarberDeng Fen Xi Bi Jiao Liao Ke Xi Shou Luo Ding Gu Ding Bing Fa Zheng De Fa Sheng Lu Yuan Yin He Yu Fang Cuo Shi Zheng Li Yan Jiu Liao 13Pian Gong Ji 668Li Huan Zhe De Guan Yu Ke Xi Shou Sheng Wu Cai Liao De Yan Jiu ,Jie Guo Fa Xian Ke Xi Shou Luo Ding Gu Ding Bing Fa Zheng Yu Ke Xi Shou Cai Liao Cheng Fen Gua Ying Zheng Xuan Ze Bu Dang Wei An Shou Zhu Gui Fan Cao Zuo He Zhu Hou Huo Dong Guo Zao Guo Duo Deng Duo Chong Yin Su You Guan Ji Shi Ru Ci ,Ke Xi Shou Cai Liao Yong Yu Lin Chuang Yi Ran Cun Zai Bu Ke Biao 1 Cai Liao Xiang Guan Shu Xing Table 1 Mechanical properties of materials Xiang Mu Pi Zhi Gu Song Zhi Gu Ke Xi Shou Sheng Wu Cai Liao Jin Shu Cai Liao Dan Xing Mo Liang (GPa) 17.0 5.0 14.0 110.0 Bo Song Bi 0.33 0.33 0.3 0.3 Chen Fan Cheng ,Yu Bao Qing ,Shi Ji Fei ,Ao Rong Yan ,Zhang Xu ,Li De Jian ,Qian Zhi Xin Xing Ke Xi Shou Luo Ding Yu Chuan Tong Luo Ding Gu Ding Lauge Hansen 1Xing Nei Huai Gu Zhe De San Wei You Xian Yuan Fen Xi [J] Zhong Guo Zu Zhi Gong Cheng Yan Jiu ,2018,22(19):3027 3032. DOI:10.3969/j.issn.2095 4344.0793 ISSN 2095 4344 CN 21 1581/R CODEN: ZLKHAH 3030 Bi Mian De Wen Ti ,Zhu Ru Wu Fa Zai Ping Pian Zhong Xian Ying ,Shi De Zhu Hou Yu Huan Zhe Gou Tong Shi Cun Zai Kun Nan ,Zai Zhe Fang Mian ,Zuo Zhe Suo Zai Ke Ti Zu Cai Yong Zai Ke Xi Shou Luo Ding Zhong Tian Jia Yi Ding Bi Li Te Shu Ke Xi Shou Xian Ying Wu Zhi ,Ke Zai Huan Zhe Zhu Hou Fu Zhen Shi Tong Guo Guan Ce Xian Ying Wu Zhi De Sheng Yu Liang Lai Pan Duan Gu Ding De Xi Shou Qing Kuang ,Cong Er Jin Yi Bu Yong Yu Jie Jue Lin Chuang Yi Huan Gou Tong Fang Mian De Wen Ti Huai Guan Jie Gu Zhe Shu Yu Lin Chuang Shang Jiao Wei Chang Jian De Gu Zhe Zhi Yi ,Shu Yu Guan Jie Nei Gu Zhe Ju Gu You Yu Jing Gu Nei Huai Bu Fen Xiang Jie De Nei Ce Mian Guan Jie Yi Ji He Wai Huai Jie Hong De Wai Ce Mian Guan Jie Jiao Huai Gu Zhe Shi Zui Chang Jian De Ji Rou Gu Ge Sun Shang ,Sun Shang Dao Zhi Gu Zhe Duan Duan Fa Sheng Yan Zhong Wei Yi Jin Guan Bu Fa Sheng Wei Yi De Nei Ce Huai Gu Zhe Gua He Bao Shou Zhi Liao ,Dan Zai Jue Da Duo Shu Qing Kuang Xia ,Gu Zhe Xu Yao Tong Guo Shou Zhu Jia Yi Fu Wei Zhi Liao Yi Da Dao Jie Pou Fu Wei Lauge Hansen 1Xing Nei Huai Gu Zhe Shi Yi Lei Jian Dan De Huai Guan Jie Gu Zhe ,Zai Ci Ci Yan Jiu Zhong Jian Li Lauge Hansen 1Xing Nei Huai Gu Zhe Mo Xing ,Tong Guo Bu Tong De Luo Ding Gu Ding Lai Bi Jiao Luo Ding Zhi Jian De You Lie Xin Xing Luo Ding Zai She Ji Shang Jia Kuan Liao Zheng Ti Luo Wen De Kuan Du Yi Ti Sheng Luo Ding Yu Gu Mian De Jie Hong Mian Ji ,Zeng Jia Luo Ding De Kang Ba Chu Neng Li ,Tong Shi Ye Fen Dan Liao Suo Shou Ying Li ,Jiang Di Luo Ding Cheng Shou De Zui Da Dian Ying Li ,Jian Shao Lin Chuang Gu Ding Zhong Fa Sheng Duan Ding De Feng Xian Ling Wai Luo Ding De Cong Jie Guo Zhong Ke Yi Kan Chu ,Luo Ding Suo Shou Ying Li Zui Da Chu Jun Ji Zhong Zai Luo Ding Wei Yu Gu Zhe Jiao Hui De Wei Zhi ,Cheng Xian Liang Bian Xiang Zhong Yang Zeng Jia De Qu Shi Zhe Yu Qi Ta Yan Jiu Zhong Luo Ding Li Xue Fen Bu Yan Jiu Suo Fa Xian De Te Dian Jie Jin ,Ke Neng Shi You Yu Luo Ding De Kang Ba Chu Xiao Ying Yi Ji Wai Liang Ge Gu Kuai Ti Gong Zhi Cheng Er Qie 3Ge Gu Ding Zu Zhong ,You Jin Shu Cai Zhi De Xin Xing She Ji Luo Ding ,Suo Shou De Zui Da Ying Li Wei 46.49 MPa,Zai 3Zu Zhong Zui Xiao ;Ke Xi Shou Cai Zhi De Xin Xing She Ji Luo Ding ,Zui Da Ying Li Wei 46.78 MPa;Jin Shu Cai Zhi De Chuan Tong Wai Xing Luo Ding Shou Dao 59.08 MPa,3 Zu Zhong Zui Da Qi Zhong Yuan Yin Ke Neng Shi Xin Xing She Ji Luo Ding Jia Kuan Liao Luo Wen Yu Gu Mian De Jie Hong Mian Ji ,Fen Tan Geng Duo De Ya Li ,Jiang Di Liao Zui Da Ying Li ,Jiang Ying Li Geng Jia Jun Heng Di Fen San Zai Luo Ding Shang ,Jiang Di Liao Fa Sheng Duan Ding De Feng Xian Mu Qian Lin Chuang Shang Zui Chang Yong De Ke Xi Shou Luo Ding Wei Biofix(Zi Shen Zeng Qiang Ju Ru Suan SRPLLA),Gai Luo Ding Kang Wan Qiang 220 400 MPa,Kang Jian Qie Qiang Du Wei 180 250 MPa,Gai Shi Yan Zhong De Luo Ding Suo Shou Ying Li Xiao Yu Luo Ding De Zui Da Ke Neng Cheng Shou Ying Li ,Yin Ci Fa Sheng Duan Ding De Ke Neng Xing Jiao Xiao Luo Ding De Zui Da Wei Yi Jun Chu Xian Zai Luo Ding De Wei Bu ,Bing Qie Cong Wei Duan Dao Tou Duan Yi Ci Di Jian ,Zhe Yu Hen Duo Yan Jiu De Fa Xian Xiang Lei Si Xin Xing Ke Xi Shou Luo Ding Gu Ding Zu Xin Xing Jin Shu Luo Ding Gu Ding Zu Ji Chuan Tong Jin Shu Luo Ding Gu Ding Zu 3Zu De Luo Ding Zui Da Wei Yi Fen Bie Shi 0.239 mm,0.223 mmYi Ji 0.182 mm,Qi Zhong Chuan Tong Jin Shu Luo Ding Gu Ding Zu De Zui Da Wei Yi Zai 3Zu Zhong Tu 1 Zai Geomagic Zhong Yong Bu Tong Luo Ding Dui Gou Jian De Nei Huai Gu Zhe Mo Xing Jin Xing Zhuang Da Figure 1 Medial malleolus fracture models fixd by different screws in Geomagic software Tu Zhu :Tu A Wei Xin Xing Ke Xi Shou Luo Ding Gu Ding ;B Wei Xin Xing Jin Shu Luo Ding Gu Ding ;CWei Chuan Tong Jin Shu Luo Ding Gu Ding A B C Tu 2 Zai Hypermesh Zhong She Zhi Bian Jie Tiao Jian Yue Shu Yi Ji Zai He Tiao Jian De Mo Xing Zheng Ti Figure 2 Setting boundary conditions, constraint conditions and loading conditions in Hypermesh software A B C